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| author | Markus Armbruster <armbru@redhat.com> | 2023-04-28 12:54:29 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2023-05-10 10:01:01 +0200 |
| commit | a937b6aa739f65f2cae2ad9a7eb65a309ad2a359 (patch) | |
| tree | c11a2c7b6fc5b850ef4dd6b613902759824779a5 /qapi/migration.json | |
| parent | 059d341a67bb660a7957cb62a6a860c92c2fb64a (diff) | |
| download | qemu-a937b6aa739f65f2cae2ad9a7eb65a309ad2a359.zip qemu-a937b6aa739f65f2cae2ad9a7eb65a309ad2a359.tar.gz qemu-a937b6aa739f65f2cae2ad9a7eb65a309ad2a359.tar.bz2 | |
qapi: Reformat doc comments to conform to current conventions
Change
# @name: Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed
# do eiusmod tempor incididunt ut labore et dolore magna aliqua.
to
# @name: Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed
# do eiusmod tempor incididunt ut labore et dolore magna aliqua.
See recent commit "qapi: Relax doc string @name: description
indentation rules" for rationale.
Reflow paragraphs to 70 columns width, and consistently use two spaces
to separate sentences.
To check the generated documentation does not change, I compared the
generated HTML before and after this commit with "wdiff -3". Finds no
differences. Comparing with diff is not useful, as the reflown
paragraphs are visible there.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230428105429.1687850-18-armbru@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Lukas Straub <lukasstraub2@web.de>
[Straightforward conflicts in qapi/audio.json qapi/misc-target.json
qapi/run-state.json resolved]
Diffstat (limited to 'qapi/migration.json')
| -rw-r--r-- | qapi/migration.json | 1173 |
1 files changed, 579 insertions, 594 deletions
diff --git a/qapi/migration.json b/qapi/migration.json index 11c0980..952d3e2 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -16,7 +16,8 @@ # # @transferred: amount of bytes already transferred to the target VM # -# @remaining: amount of bytes remaining to be transferred to the target VM +# @remaining: amount of bytes remaining to be transferred to the +# target VM # # @total: total amount of bytes involved in the migration process # @@ -28,37 +29,39 @@ # # @normal-bytes: number of normal bytes sent (since 1.2) # -# @dirty-pages-rate: number of pages dirtied by second by the -# guest (since 1.3) +# @dirty-pages-rate: number of pages dirtied by second by the guest +# (since 1.3) # -# @mbps: throughput in megabits/sec. (since 1.6) +# @mbps: throughput in megabits/sec. (since 1.6) # -# @dirty-sync-count: number of times that dirty ram was synchronized (since 2.1) +# @dirty-sync-count: number of times that dirty ram was synchronized +# (since 2.1) # -# @postcopy-requests: The number of page requests received from the destination -# (since 2.7) +# @postcopy-requests: The number of page requests received from the +# destination (since 2.7) # # @page-size: The number of bytes per page for the various page-based -# statistics (since 2.10) +# statistics (since 2.10) # # @multifd-bytes: The number of bytes sent through multifd (since 3.0) # # @pages-per-second: the number of memory pages transferred per second -# (Since 4.0) +# (Since 4.0) # # @precopy-bytes: The number of bytes sent in the pre-copy phase -# (since 7.0). +# (since 7.0). # # @downtime-bytes: The number of bytes sent while the guest is paused -# (since 7.0). +# (since 7.0). # # @postcopy-bytes: The number of bytes sent during the post-copy phase -# (since 7.0). +# (since 7.0). +# +# @dirty-sync-missed-zero-copy: Number of times dirty RAM +# synchronization could not avoid copying dirty pages. This is +# between 0 and @dirty-sync-count * @multifd-channels. (since +# 7.1) # -# @dirty-sync-missed-zero-copy: Number of times dirty RAM synchronization could -# not avoid copying dirty pages. This is between -# 0 and @dirty-sync-count * @multifd-channels. -# (since 7.1) # Since: 0.14 ## { 'struct': 'MigrationStats', @@ -105,7 +108,8 @@ # # @pages: amount of pages compressed and transferred to the target VM # -# @busy: count of times that no free thread was available to compress data +# @busy: count of times that no free thread was available to compress +# data # # @busy-rate: rate of thread busy # @@ -134,26 +138,29 @@ # # @active: in the process of doing migration. # -# @postcopy-active: like active, but now in postcopy mode. (since 2.5) +# @postcopy-active: like active, but now in postcopy mode. (since +# 2.5) # -# @postcopy-paused: during postcopy but paused. (since 3.0) +# @postcopy-paused: during postcopy but paused. (since 3.0) # -# @postcopy-recover: trying to recover from a paused postcopy. (since 3.0) +# @postcopy-recover: trying to recover from a paused postcopy. (since +# 3.0) # # @completed: migration is finished. # # @failed: some error occurred during migration process. # -# @colo: VM is in the process of fault tolerance, VM can not get into this -# state unless colo capability is enabled for migration. (since 2.8) +# @colo: VM is in the process of fault tolerance, VM can not get into +# this state unless colo capability is enabled for migration. +# (since 2.8) # -# @pre-switchover: Paused before device serialisation. (since 2.11) +# @pre-switchover: Paused before device serialisation. (since 2.11) # -# @device: During device serialisation when pause-before-switchover is enabled -# (since 2.11) +# @device: During device serialisation when pause-before-switchover is +# enabled (since 2.11) # -# @wait-unplug: wait for device unplug request by guest OS to be completed. -# (since 4.2) +# @wait-unplug: wait for device unplug request by guest OS to be +# completed. (since 4.2) # # Since: 2.3 ## @@ -167,7 +174,8 @@ # # Detailed VFIO devices migration statistics # -# @transferred: amount of bytes transferred to the target VM by VFIO devices +# @transferred: amount of bytes transferred to the target VM by VFIO +# devices # # Since: 5.2 ## @@ -180,67 +188,67 @@ # Information about current migration process. # # @status: @MigrationStatus describing the current migration status. -# If this field is not returned, no migration process -# has been initiated +# If this field is not returned, no migration process has been +# initiated # -# @ram: @MigrationStats containing detailed migration -# status, only returned if status is 'active' or -# 'completed'(since 1.2) +# @ram: @MigrationStats containing detailed migration status, only +# returned if status is 'active' or 'completed'(since 1.2) # -# @disk: @MigrationStats containing detailed disk migration -# status, only returned if status is 'active' and it is a block -# migration +# @disk: @MigrationStats containing detailed disk migration status, +# only returned if status is 'active' and it is a block migration # # @xbzrle-cache: @XBZRLECacheStats containing detailed XBZRLE -# migration statistics, only returned if XBZRLE feature is on and -# status is 'active' or 'completed' (since 1.2) +# migration statistics, only returned if XBZRLE feature is on and +# status is 'active' or 'completed' (since 1.2) # # @total-time: total amount of milliseconds since migration started. -# If migration has ended, it returns the total migration -# time. (since 1.2) +# If migration has ended, it returns the total migration time. +# (since 1.2) # -# @downtime: only present when migration finishes correctly -# total downtime in milliseconds for the guest. -# (since 1.3) +# @downtime: only present when migration finishes correctly total +# downtime in milliseconds for the guest. (since 1.3) # -# @expected-downtime: only present while migration is active -# expected downtime in milliseconds for the guest in last walk -# of the dirty bitmap. (since 1.3) +# @expected-downtime: only present while migration is active expected +# downtime in milliseconds for the guest in last walk of the dirty +# bitmap. (since 1.3) # # @setup-time: amount of setup time in milliseconds *before* the -# iterations begin but *after* the QMP command is issued. This is designed -# to provide an accounting of any activities (such as RDMA pinning) which -# may be expensive, but do not actually occur during the iterative -# migration rounds themselves. (since 1.6) +# iterations begin but *after* the QMP command is issued. This is +# designed to provide an accounting of any activities (such as +# RDMA pinning) which may be expensive, but do not actually occur +# during the iterative migration rounds themselves. (since 1.6) # # @cpu-throttle-percentage: percentage of time guest cpus are being -# throttled during auto-converge. This is only present when auto-converge -# has started throttling guest cpus. (Since 2.7) +# throttled during auto-converge. This is only present when +# auto-converge has started throttling guest cpus. (Since 2.7) # # @error-desc: the human readable error description string, when -# @status is 'failed'. Clients should not attempt to parse the -# error strings. (Since 2.7) +# @status is 'failed'. Clients should not attempt to parse the +# error strings. (Since 2.7) # -# @postcopy-blocktime: total time when all vCPU were blocked during postcopy -# live migration. This is only present when the postcopy-blocktime -# migration capability is enabled. (Since 3.0) +# @postcopy-blocktime: total time when all vCPU were blocked during +# postcopy live migration. This is only present when the +# postcopy-blocktime migration capability is enabled. (Since 3.0) # -# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU. This is -# only present when the postcopy-blocktime migration capability -# is enabled. (Since 3.0) +# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU. +# This is only present when the postcopy-blocktime migration +# capability is enabled. (Since 3.0) # -# @compression: migration compression statistics, only returned if compression -# feature is on and status is 'active' or 'completed' (Since 3.1) +# @compression: migration compression statistics, only returned if +# compression feature is on and status is 'active' or 'completed' +# (Since 3.1) # -# @socket-address: Only used for tcp, to know what the real port is (Since 4.0) +# @socket-address: Only used for tcp, to know what the real port is +# (Since 4.0) # -# @vfio: @VfioStats containing detailed VFIO devices migration statistics, -# only returned if VFIO device is present, migration is supported by all -# VFIO devices and status is 'active' or 'completed' (since 5.2) +# @vfio: @VfioStats containing detailed VFIO devices migration +# statistics, only returned if VFIO device is present, migration +# is supported by all VFIO devices and status is 'active' or +# 'completed' (since 5.2) # -# @blocked-reasons: A list of reasons an outgoing migration is blocked. -# Present and non-empty when migration is blocked. -# (since 6.0) +# @blocked-reasons: A list of reasons an outgoing migration is +# blocked. Present and non-empty when migration is blocked. +# (since 6.0) # # Since: 0.14 ## @@ -264,7 +272,7 @@ ## # @query-migrate: # -# Returns information about current migration process. If migration +# Returns information about current migration process. If migration # is active there will be another json-object with RAM migration # status and if block migration is active another one with block # migration status. @@ -381,7 +389,6 @@ # } # } # } -# ## { 'command': 'query-migrate', 'returns': 'MigrationInfo' } @@ -390,95 +397,98 @@ # # Migration capabilities enumeration # -# @xbzrle: Migration supports xbzrle (Xor Based Zero Run Length Encoding). -# This feature allows us to minimize migration traffic for certain work -# loads, by sending compressed difference of the pages -# -# @rdma-pin-all: Controls whether or not the entire VM memory footprint is -# mlock()'d on demand or all at once. Refer to docs/rdma.txt for usage. -# Disabled by default. (since 2.0) -# -# @zero-blocks: During storage migration encode blocks of zeroes efficiently. This -# essentially saves 1MB of zeroes per block on the wire. Enabling requires -# source and target VM to support this feature. To enable it is sufficient -# to enable the capability on the source VM. The feature is disabled by -# default. (since 1.6) -# -# @compress: Use multiple compression threads to accelerate live migration. -# This feature can help to reduce the migration traffic, by sending -# compressed pages. Please note that if compress and xbzrle are both -# on, compress only takes effect in the ram bulk stage, after that, -# it will be disabled and only xbzrle takes effect, this can help to -# minimize migration traffic. The feature is disabled by default. -# (since 2.4 ) -# -# @events: generate events for each migration state change -# (since 2.4 ) -# -# @auto-converge: If enabled, QEMU will automatically throttle down the guest -# to speed up convergence of RAM migration. (since 1.6) -# -# @postcopy-ram: Start executing on the migration target before all of RAM has -# been migrated, pulling the remaining pages along as needed. The -# capacity must have the same setting on both source and target -# or migration will not even start. NOTE: If the migration fails during -# postcopy the VM will fail. (since 2.6) -# -# @x-colo: If enabled, migration will never end, and the state of the VM on the -# primary side will be migrated continuously to the VM on secondary -# side, this process is called COarse-Grain LOck Stepping (COLO) for -# Non-stop Service. (since 2.8) -# -# @release-ram: if enabled, qemu will free the migrated ram pages on the source -# during postcopy-ram migration. (since 2.9) +# @xbzrle: Migration supports xbzrle (Xor Based Zero Run Length +# Encoding). This feature allows us to minimize migration traffic +# for certain work loads, by sending compressed difference of the +# pages +# +# @rdma-pin-all: Controls whether or not the entire VM memory +# footprint is mlock()'d on demand or all at once. Refer to +# docs/rdma.txt for usage. Disabled by default. (since 2.0) +# +# @zero-blocks: During storage migration encode blocks of zeroes +# efficiently. This essentially saves 1MB of zeroes per block on +# the wire. Enabling requires source and target VM to support +# this feature. To enable it is sufficient to enable the +# capability on the source VM. The feature is disabled by default. +# (since 1.6) +# +# @compress: Use multiple compression threads to accelerate live +# migration. This feature can help to reduce the migration +# traffic, by sending compressed pages. Please note that if +# compress and xbzrle are both on, compress only takes effect in +# the ram bulk stage, after that, it will be disabled and only +# xbzrle takes effect, this can help to minimize migration +# traffic. The feature is disabled by default. (since 2.4 ) +# +# @events: generate events for each migration state change (since 2.4 +# ) +# +# @auto-converge: If enabled, QEMU will automatically throttle down +# the guest to speed up convergence of RAM migration. (since 1.6) +# +# @postcopy-ram: Start executing on the migration target before all of +# RAM has been migrated, pulling the remaining pages along as +# needed. The capacity must have the same setting on both source +# and target or migration will not even start. NOTE: If the +# migration fails during postcopy the VM will fail. (since 2.6) +# +# @x-colo: If enabled, migration will never end, and the state of the +# VM on the primary side will be migrated continuously to the VM +# on secondary side, this process is called COarse-Grain LOck +# Stepping (COLO) for Non-stop Service. (since 2.8) +# +# @release-ram: if enabled, qemu will free the migrated ram pages on +# the source during postcopy-ram migration. (since 2.9) # # @block: If enabled, QEMU will also migrate the contents of all block -# devices. Default is disabled. A possible alternative uses -# mirror jobs to a builtin NBD server on the destination, which -# offers more flexibility. -# (Since 2.10) +# devices. Default is disabled. A possible alternative uses +# mirror jobs to a builtin NBD server on the destination, which +# offers more flexibility. (Since 2.10) # # @return-path: If enabled, migration will use the return path even -# for precopy. (since 2.10) +# for precopy. (since 2.10) # -# @pause-before-switchover: Pause outgoing migration before serialising device -# state and before disabling block IO (since 2.11) +# @pause-before-switchover: Pause outgoing migration before +# serialising device state and before disabling block IO (since +# 2.11) # # @multifd: Use more than one fd for migration (since 4.0) # # @dirty-bitmaps: If enabled, QEMU will migrate named dirty bitmaps. -# (since 2.12) +# (since 2.12) # # @postcopy-blocktime: Calculate downtime for postcopy live migration -# (since 3.0) +# (since 3.0) # -# @late-block-activate: If enabled, the destination will not activate block -# devices (and thus take locks) immediately at the end of migration. -# (since 3.0) +# @late-block-activate: If enabled, the destination will not activate +# block devices (and thus take locks) immediately at the end of +# migration. (since 3.0) # -# @x-ignore-shared: If enabled, QEMU will not migrate shared memory (since 4.0) +# @x-ignore-shared: If enabled, QEMU will not migrate shared memory +# (since 4.0) # # @validate-uuid: Send the UUID of the source to allow the destination -# to ensure it is the same. (since 4.2) -# -# @background-snapshot: If enabled, the migration stream will be a snapshot -# of the VM exactly at the point when the migration -# procedure starts. The VM RAM is saved with running VM. -# (since 6.0) -# -# @zero-copy-send: Controls behavior on sending memory pages on migration. -# When true, enables a zero-copy mechanism for sending -# memory pages, if host supports it. -# Requires that QEMU be permitted to use locked memory -# for guest RAM pages. -# (since 7.1) -# @postcopy-preempt: If enabled, the migration process will allow postcopy -# requests to preempt precopy stream, so postcopy requests -# will be handled faster. This is a performance feature and -# should not affect the correctness of postcopy migration. -# (since 7.1) +# to ensure it is the same. (since 4.2) +# +# @background-snapshot: If enabled, the migration stream will be a +# snapshot of the VM exactly at the point when the migration +# procedure starts. The VM RAM is saved with running VM. (since +# 6.0) +# +# @zero-copy-send: Controls behavior on sending memory pages on +# migration. When true, enables a zero-copy mechanism for sending +# memory pages, if host supports it. Requires that QEMU be +# permitted to use locked memory for guest RAM pages. (since 7.1) +# +# @postcopy-preempt: If enabled, the migration process will allow +# postcopy requests to preempt precopy stream, so postcopy +# requests will be handled faster. This is a performance feature +# and should not affect the correctness of postcopy migration. +# (since 7.1) # # Features: +# # @unstable: Members @x-colo and @x-ignore-shared are experimental. # # Since: 1.2 @@ -522,7 +532,6 @@ # -> { "execute": "migrate-set-capabilities" , "arguments": # { "capabilities": [ { "capability": "xbzrle", "state": true } ] } } # <- { "return": {} } -# ## { 'command': 'migrate-set-capabilities', 'data': { 'capabilities': ['MigrationCapabilityStatus'] } } @@ -549,7 +558,6 @@ # {"state": false, "capability": "postcopy-ram"}, # {"state": false, "capability": "x-colo"} # ]} -# ## { 'command': 'query-migrate-capabilities', 'returns': ['MigrationCapabilityStatus']} @@ -559,7 +567,9 @@ # An enumeration of multifd compression methods. # # @none: no compression. +# # @zlib: use zlib compression method. +# # @zstd: use zstd compression method. # # Since: 5.0 @@ -571,8 +581,8 @@ ## # @BitmapMigrationBitmapAliasTransform: # -# @persistent: If present, the bitmap will be made persistent -# or transient depending on this parameter. +# @persistent: If present, the bitmap will be made persistent or +# transient depending on this parameter. # # Since: 6.0 ## @@ -587,10 +597,10 @@ # @name: The name of the bitmap. # # @alias: An alias name for migration (for example the bitmap name on -# the opposite site). +# the opposite site). # -# @transform: Allows the modification of the migrated bitmap. -# (since 6.0) +# @transform: Allows the modification of the migrated bitmap. (since +# 6.0) # # Since: 5.2 ## @@ -609,8 +619,8 @@ # # @node-name: A block node name. # -# @alias: An alias block node name for migration (for example the -# node name on the opposite site). +# @alias: An alias block node name for migration (for example the node +# name on the opposite site). # # @bitmaps: Mappings for the bitmaps on this node. # @@ -628,156 +638,149 @@ # # Migration parameters enumeration # -# @announce-initial: Initial delay (in milliseconds) before sending the first -# announce (Since 4.0) +# @announce-initial: Initial delay (in milliseconds) before sending +# the first announce (Since 4.0) # -# @announce-max: Maximum delay (in milliseconds) between packets in the -# announcement (Since 4.0) +# @announce-max: Maximum delay (in milliseconds) between packets in +# the announcement (Since 4.0) # -# @announce-rounds: Number of self-announce packets sent after migration -# (Since 4.0) +# @announce-rounds: Number of self-announce packets sent after +# migration (Since 4.0) # -# @announce-step: Increase in delay (in milliseconds) between subsequent -# packets in the announcement (Since 4.0) +# @announce-step: Increase in delay (in milliseconds) between +# subsequent packets in the announcement (Since 4.0) # -# @compress-level: Set the compression level to be used in live migration, -# the compression level is an integer between 0 and 9, where 0 means -# no compression, 1 means the best compression speed, and 9 means best -# compression ratio which will consume more CPU. +# @compress-level: Set the compression level to be used in live +# migration, the compression level is an integer between 0 and 9, +# where 0 means no compression, 1 means the best compression +# speed, and 9 means best compression ratio which will consume +# more CPU. # -# @compress-threads: Set compression thread count to be used in live migration, -# the compression thread count is an integer between 1 and 255. +# @compress-threads: Set compression thread count to be used in live +# migration, the compression thread count is an integer between 1 +# and 255. # -# @compress-wait-thread: Controls behavior when all compression threads are -# currently busy. If true (default), wait for a free -# compression thread to become available; otherwise, -# send the page uncompressed. (Since 3.1) +# @compress-wait-thread: Controls behavior when all compression +# threads are currently busy. If true (default), wait for a free +# compression thread to become available; otherwise, send the page +# uncompressed. (Since 3.1) # -# @decompress-threads: Set decompression thread count to be used in live -# migration, the decompression thread count is an integer between 1 -# and 255. Usually, decompression is at least 4 times as fast as -# compression, so set the decompress-threads to the number about 1/4 -# of compress-threads is adequate. +# @decompress-threads: Set decompression thread count to be used in +# live migration, the decompression thread count is an integer +# between 1 and 255. Usually, decompression is at least 4 times as +# fast as compression, so set the decompress-threads to the number +# about 1/4 of compress-threads is adequate. # -# @throttle-trigger-threshold: The ratio of bytes_dirty_period and bytes_xfer_period -# to trigger throttling. It is expressed as percentage. -# The default value is 50. (Since 5.0) +# @throttle-trigger-threshold: The ratio of bytes_dirty_period and +# bytes_xfer_period to trigger throttling. It is expressed as +# percentage. The default value is 50. (Since 5.0) # -# @cpu-throttle-initial: Initial percentage of time guest cpus are throttled -# when migration auto-converge is activated. The -# default value is 20. (Since 2.7) +# @cpu-throttle-initial: Initial percentage of time guest cpus are +# throttled when migration auto-converge is activated. The +# default value is 20. (Since 2.7) # # @cpu-throttle-increment: throttle percentage increase each time -# auto-converge detects that migration is not making -# progress. The default value is 10. (Since 2.7) -# -# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage -# At the tail stage of throttling, the Guest is very -# sensitive to CPU percentage while the @cpu-throttle -# -increment is excessive usually at tail stage. -# If this parameter is true, we will compute the ideal -# CPU percentage used by the Guest, which may exactly make -# the dirty rate match the dirty rate threshold. Then we -# will choose a smaller throttle increment between the -# one specified by @cpu-throttle-increment and the one -# generated by ideal CPU percentage. -# Therefore, it is compatible to traditional throttling, -# meanwhile the throttle increment won't be excessive -# at tail stage. -# The default value is false. (Since 5.1) -# -# @tls-creds: ID of the 'tls-creds' object that provides credentials for -# establishing a TLS connection over the migration data channel. -# On the outgoing side of the migration, the credentials must -# be for a 'client' endpoint, while for the incoming side the -# credentials must be for a 'server' endpoint. Setting this -# will enable TLS for all migrations. The default is unset, -# resulting in unsecured migration at the QEMU level. (Since 2.7) -# -# @tls-hostname: hostname of the target host for the migration. This is -# required when using x509 based TLS credentials and the -# migration URI does not already include a hostname. For -# example if using fd: or exec: based migration, the -# hostname must be provided so that the server's x509 -# certificate identity can be validated. (Since 2.7) -# -# @tls-authz: ID of the 'authz' object subclass that provides access control -# checking of the TLS x509 certificate distinguished name. -# This object is only resolved at time of use, so can be deleted -# and recreated on the fly while the migration server is active. -# If missing, it will default to denying access (Since 4.0) -# -# @max-bandwidth: to set maximum speed for migration. maximum speed in -# bytes per second. (Since 2.8) -# -# @downtime-limit: set maximum tolerated downtime for migration. maximum -# downtime in milliseconds (Since 2.8) -# -# @x-checkpoint-delay: The delay time (in ms) between two COLO checkpoints in -# periodic mode. (Since 2.8) +# auto-converge detects that migration is not making progress. +# The default value is 10. (Since 2.7) +# +# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At +# the tail stage of throttling, the Guest is very sensitive to CPU +# percentage while the @cpu-throttle -increment is excessive +# usually at tail stage. If this parameter is true, we will +# compute the ideal CPU percentage used by the Guest, which may +# exactly make the dirty rate match the dirty rate threshold. +# Then we will choose a smaller throttle increment between the one +# specified by @cpu-throttle-increment and the one generated by +# ideal CPU percentage. Therefore, it is compatible to +# traditional throttling, meanwhile the throttle increment won't +# be excessive at tail stage. The default value is false. (Since +# 5.1) +# +# @tls-creds: ID of the 'tls-creds' object that provides credentials +# for establishing a TLS connection over the migration data +# channel. On the outgoing side of the migration, the credentials +# must be for a 'client' endpoint, while for the incoming side the +# credentials must be for a 'server' endpoint. Setting this will +# enable TLS for all migrations. The default is unset, resulting +# in unsecured migration at the QEMU level. (Since 2.7) +# +# @tls-hostname: hostname of the target host for the migration. This +# is required when using x509 based TLS credentials and the +# migration URI does not already include a hostname. For example +# if using fd: or exec: based migration, the hostname must be +# provided so that the server's x509 certificate identity can be +# validated. (Since 2.7) +# +# @tls-authz: ID of the 'authz' object subclass that provides access +# control checking of the TLS x509 certificate distinguished name. +# This object is only resolved at time of use, so can be deleted +# and recreated on the fly while the migration server is active. +# If missing, it will default to denying access (Since 4.0) +# +# @max-bandwidth: to set maximum speed for migration. maximum speed +# in bytes per second. (Since 2.8) +# +# @downtime-limit: set maximum tolerated downtime for migration. +# maximum downtime in milliseconds (Since 2.8) +# +# @x-checkpoint-delay: The delay time (in ms) between two COLO +# checkpoints in periodic mode. (Since 2.8) # # @block-incremental: Affects how much storage is migrated when the -# block migration capability is enabled. When false, the entire -# storage backing chain is migrated into a flattened image at -# the destination; when true, only the active qcow2 layer is -# migrated and the destination must already have access to the -# same backing chain as was used on the source. (since 2.10) +# block migration capability is enabled. When false, the entire +# storage backing chain is migrated into a flattened image at the +# destination; when true, only the active qcow2 layer is migrated +# and the destination must already have access to the same backing +# chain as was used on the source. (since 2.10) # # @multifd-channels: Number of channels used to migrate data in -# parallel. This is the same number that the -# number of sockets used for migration. The -# default value is 2 (since 4.0) +# parallel. This is the same number that the number of sockets +# used for migration. The default value is 2 (since 4.0) # # @xbzrle-cache-size: cache size to be used by XBZRLE migration. It -# needs to be a multiple of the target page size -# and a power of 2 -# (Since 2.11) +# needs to be a multiple of the target page size and a power of 2 +# (Since 2.11) # -# @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. -# Defaults to 0 (unlimited). In bytes per second. -# (Since 3.0) +# @max-postcopy-bandwidth: Background transfer bandwidth during +# postcopy. Defaults to 0 (unlimited). In bytes per second. +# (Since 3.0) # -# @max-cpu-throttle: maximum cpu throttle percentage. -# Defaults to 99. (Since 3.1) +# @max-cpu-throttle: maximum cpu throttle percentage. Defaults to 99. +# (Since 3.1) # -# @multifd-compression: Which compression method to use. -# Defaults to none. (Since 5.0) +# @multifd-compression: Which compression method to use. Defaults to +# none. (Since 5.0) # # @multifd-zlib-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 9, where 0 means no compression, 1 means the best -# compression speed, and 9 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) +# migration, the compression level is an integer between 0 and 9, +# where 0 means no compression, 1 means the best compression +# speed, and 9 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @multifd-zstd-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 20, where 0 means no compression, 1 means the best -# compression speed, and 20 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) -# +# migration, the compression level is an integer between 0 and 20, +# where 0 means no compression, 1 means the best compression +# speed, and 20 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @block-bitmap-mapping: Maps block nodes and bitmaps on them to -# aliases for the purpose of dirty bitmap migration. Such -# aliases may for example be the corresponding names on the -# opposite site. -# The mapping must be one-to-one, but not necessarily -# complete: On the source, unmapped bitmaps and all bitmaps -# on unmapped nodes will be ignored. On the destination, -# encountering an unmapped alias in the incoming migration -# stream will result in a report, and all further bitmap -# migration data will then be discarded. -# Note that the destination does not know about bitmaps it -# does not receive, so there is no limitation or requirement -# regarding the number of bitmaps received, or how they are -# named, or on which nodes they are placed. -# By default (when this parameter has never been set), bitmap -# names are mapped to themselves. Nodes are mapped to their -# block device name if there is one, and to their node name -# otherwise. (Since 5.2) +# aliases for the purpose of dirty bitmap migration. Such aliases +# may for example be the corresponding names on the opposite site. +# The mapping must be one-to-one, but not necessarily complete: On +# the source, unmapped bitmaps and all bitmaps on unmapped nodes +# will be ignored. On the destination, encountering an unmapped +# alias in the incoming migration stream will result in a report, +# and all further bitmap migration data will then be discarded. +# Note that the destination does not know about bitmaps it does +# not receive, so there is no limitation or requirement regarding +# the number of bitmaps received, or how they are named, or on +# which nodes they are placed. By default (when this parameter +# has never been set), bitmap names are mapped to themselves. +# Nodes are mapped to their block device name if there is one, and +# to their node name otherwise. (Since 5.2) # # Features: +# # @unstable: Member @x-checkpoint-delay is experimental. # # Since: 2.4 @@ -802,151 +805,142 @@ ## # @MigrateSetParameters: # -# @announce-initial: Initial delay (in milliseconds) before sending the first -# announce (Since 4.0) +# @announce-initial: Initial delay (in milliseconds) before sending +# the first announce (Since 4.0) # -# @announce-max: Maximum delay (in milliseconds) between packets in the -# announcement (Since 4.0) +# @announce-max: Maximum delay (in milliseconds) between packets in +# the announcement (Since 4.0) # -# @announce-rounds: Number of self-announce packets sent after migration -# (Since 4.0) +# @announce-rounds: Number of self-announce packets sent after +# migration (Since 4.0) # -# @announce-step: Increase in delay (in milliseconds) between subsequent -# packets in the announcement (Since 4.0) +# @announce-step: Increase in delay (in milliseconds) between +# subsequent packets in the announcement (Since 4.0) # # @compress-level: compression level # # @compress-threads: compression thread count # -# @compress-wait-thread: Controls behavior when all compression threads are -# currently busy. If true (default), wait for a free -# compression thread to become available; otherwise, -# send the page uncompressed. (Since 3.1) +# @compress-wait-thread: Controls behavior when all compression +# threads are currently busy. If true (default), wait for a free +# compression thread to become available; otherwise, send the page +# uncompressed. (Since 3.1) # # @decompress-threads: decompression thread count # -# @throttle-trigger-threshold: The ratio of bytes_dirty_period and bytes_xfer_period -# to trigger throttling. It is expressed as percentage. -# The default value is 50. (Since 5.0) +# @throttle-trigger-threshold: The ratio of bytes_dirty_period and +# bytes_xfer_period to trigger throttling. It is expressed as +# percentage. The default value is 50. (Since 5.0) # # @cpu-throttle-initial: Initial percentage of time guest cpus are -# throttled when migration auto-converge is activated. -# The default value is 20. (Since 2.7) +# throttled when migration auto-converge is activated. The +# default value is 20. (Since 2.7) # # @cpu-throttle-increment: throttle percentage increase each time -# auto-converge detects that migration is not making -# progress. The default value is 10. (Since 2.7) -# -# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage -# At the tail stage of throttling, the Guest is very -# sensitive to CPU percentage while the @cpu-throttle -# -increment is excessive usually at tail stage. -# If this parameter is true, we will compute the ideal -# CPU percentage used by the Guest, which may exactly make -# the dirty rate match the dirty rate threshold. Then we -# will choose a smaller throttle increment between the -# one specified by @cpu-throttle-increment and the one -# generated by ideal CPU percentage. -# Therefore, it is compatible to traditional throttling, -# meanwhile the throttle increment won't be excessive -# at tail stage. -# The default value is false. (Since 5.1) +# auto-converge detects that migration is not making progress. +# The default value is 10. (Since 2.7) +# +# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At +# the tail stage of throttling, the Guest is very sensitive to CPU +# percentage while the @cpu-throttle -increment is excessive +# usually at tail stage. If this parameter is true, we will +# compute the ideal CPU percentage used by the Guest, which may +# exactly make the dirty rate match the dirty rate threshold. +# Then we will choose a smaller throttle increment between the one +# specified by @cpu-throttle-increment and the one generated by +# ideal CPU percentage. Therefore, it is compatible to +# traditional throttling, meanwhile the throttle increment won't +# be excessive at tail stage. The default value is false. (Since +# 5.1) # # @tls-creds: ID of the 'tls-creds' object that provides credentials -# for establishing a TLS connection over the migration data -# channel. On the outgoing side of the migration, the credentials -# must be for a 'client' endpoint, while for the incoming side the -# credentials must be for a 'server' endpoint. Setting this -# to a non-empty string enables TLS for all migrations. -# An empty string means that QEMU will use plain text mode for -# migration, rather than TLS (Since 2.9) -# Previously (since 2.7), this was reported by omitting -# tls-creds instead. -# -# @tls-hostname: hostname of the target host for the migration. This -# is required when using x509 based TLS credentials and the -# migration URI does not already include a hostname. For -# example if using fd: or exec: based migration, the -# hostname must be provided so that the server's x509 -# certificate identity can be validated. (Since 2.7) -# An empty string means that QEMU will use the hostname -# associated with the migration URI, if any. (Since 2.9) -# Previously (since 2.7), this was reported by omitting -# tls-hostname instead. -# -# @max-bandwidth: to set maximum speed for migration. maximum speed in -# bytes per second. (Since 2.8) -# -# @downtime-limit: set maximum tolerated downtime for migration. maximum -# downtime in milliseconds (Since 2.8) -# -# @x-checkpoint-delay: the delay time between two COLO checkpoints. (Since 2.8) +# for establishing a TLS connection over the migration data +# channel. On the outgoing side of the migration, the credentials +# must be for a 'client' endpoint, while for the incoming side the +# credentials must be for a 'server' endpoint. Setting this to a +# non-empty string enables TLS for all migrations. An empty +# string means that QEMU will use plain text mode for migration, +# rather than TLS (Since 2.9) Previously (since 2.7), this was +# reported by omitting tls-creds instead. +# +# @tls-hostname: hostname of the target host for the migration. This +# is required when using x509 based TLS credentials and the +# migration URI does not already include a hostname. For example +# if using fd: or exec: based migration, the hostname must be +# provided so that the server's x509 certificate identity can be +# validated. (Since 2.7) An empty string means that QEMU will use +# the hostname associated with the migration URI, if any. (Since +# 2.9) Previously (since 2.7), this was reported by omitting +# tls-hostname instead. +# +# @max-bandwidth: to set maximum speed for migration. maximum speed +# in bytes per second. (Since 2.8) +# +# @downtime-limit: set maximum tolerated downtime for migration. +# maximum downtime in milliseconds (Since 2.8) +# +# @x-checkpoint-delay: the delay time between two COLO checkpoints. +# (Since 2.8) # # @block-incremental: Affects how much storage is migrated when the -# block migration capability is enabled. When false, the entire -# storage backing chain is migrated into a flattened image at -# the destination; when true, only the active qcow2 layer is -# migrated and the destination must already have access to the -# same backing chain as was used on the source. (since 2.10) +# block migration capability is enabled. When false, the entire +# storage backing chain is migrated into a flattened image at the +# destination; when true, only the active qcow2 layer is migrated +# and the destination must already have access to the same backing +# chain as was used on the source. (since 2.10) # # @multifd-channels: Number of channels used to migrate data in -# parallel. This is the same number that the -# number of sockets used for migration. The -# default value is 2 (since 4.0) +# parallel. This is the same number that the number of sockets +# used for migration. The default value is 2 (since 4.0) # # @xbzrle-cache-size: cache size to be used by XBZRLE migration. It -# needs to be a multiple of the target page size -# and a power of 2 -# (Since 2.11) +# needs to be a multiple of the target page size and a power of 2 +# (Since 2.11) # -# @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. -# Defaults to 0 (unlimited). In bytes per second. -# (Since 3.0) +# @max-postcopy-bandwidth: Background transfer bandwidth during +# postcopy. Defaults to 0 (unlimited). In bytes per second. +# (Since 3.0) # -# @max-cpu-throttle: maximum cpu throttle percentage. -# The default value is 99. (Since 3.1) +# @max-cpu-throttle: maximum cpu throttle percentage. The default +# value is 99. (Since 3.1) # -# @multifd-compression: Which compression method to use. -# Defaults to none. (Since 5.0) +# @multifd-compression: Which compression method to use. Defaults to +# none. (Since 5.0) # # @multifd-zlib-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 9, where 0 means no compression, 1 means the best -# compression speed, and 9 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) +# migration, the compression level is an integer between 0 and 9, +# where 0 means no compression, 1 means the best compression +# speed, and 9 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @multifd-zstd-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 20, where 0 means no compression, 1 means the best -# compression speed, and 20 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) +# migration, the compression level is an integer between 0 and 20, +# where 0 means no compression, 1 means the best compression +# speed, and 20 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @block-bitmap-mapping: Maps block nodes and bitmaps on them to -# aliases for the purpose of dirty bitmap migration. Such -# aliases may for example be the corresponding names on the -# opposite site. -# The mapping must be one-to-one, but not necessarily -# complete: On the source, unmapped bitmaps and all bitmaps -# on unmapped nodes will be ignored. On the destination, -# encountering an unmapped alias in the incoming migration -# stream will result in a report, and all further bitmap -# migration data will then be discarded. -# Note that the destination does not know about bitmaps it -# does not receive, so there is no limitation or requirement -# regarding the number of bitmaps received, or how they are -# named, or on which nodes they are placed. -# By default (when this parameter has never been set), bitmap -# names are mapped to themselves. Nodes are mapped to their -# block device name if there is one, and to their node name -# otherwise. (Since 5.2) +# aliases for the purpose of dirty bitmap migration. Such aliases +# may for example be the corresponding names on the opposite site. +# The mapping must be one-to-one, but not necessarily complete: On +# the source, unmapped bitmaps and all bitmaps on unmapped nodes +# will be ignored. On the destination, encountering an unmapped +# alias in the incoming migration stream will result in a report, +# and all further bitmap migration data will then be discarded. +# Note that the destination does not know about bitmaps it does +# not receive, so there is no limitation or requirement regarding +# the number of bitmaps received, or how they are named, or on +# which nodes they are placed. By default (when this parameter +# has never been set), bitmap names are mapped to themselves. +# Nodes are mapped to their block device name if there is one, and +# to their node name otherwise. (Since 5.2) # # Features: +# # @unstable: Member @x-checkpoint-delay is experimental. # # TODO: either fuse back into MigrationParameters, or make -# MigrationParameters members mandatory +# MigrationParameters members mandatory # # Since: 2.4 ## @@ -992,7 +986,6 @@ # -> { "execute": "migrate-set-parameters" , # "arguments": { "compress-level": 1 } } # <- { "return": {} } -# ## { 'command': 'migrate-set-parameters', 'boxed': true, 'data': 'MigrateSetParameters' } @@ -1002,149 +995,140 @@ # # The optional members aren't actually optional. # -# @announce-initial: Initial delay (in milliseconds) before sending the -# first announce (Since 4.0) +# @announce-initial: Initial delay (in milliseconds) before sending +# the first announce (Since 4.0) # -# @announce-max: Maximum delay (in milliseconds) between packets in the -# announcement (Since 4.0) +# @announce-max: Maximum delay (in milliseconds) between packets in +# the announcement (Since 4.0) # -# @announce-rounds: Number of self-announce packets sent after migration -# (Since 4.0) +# @announce-rounds: Number of self-announce packets sent after +# migration (Since 4.0) # -# @announce-step: Increase in delay (in milliseconds) between subsequent -# packets in the announcement (Since 4.0) +# @announce-step: Increase in delay (in milliseconds) between +# subsequent packets in the announcement (Since 4.0) # # @compress-level: compression level # # @compress-threads: compression thread count # -# @compress-wait-thread: Controls behavior when all compression threads are -# currently busy. If true (default), wait for a free -# compression thread to become available; otherwise, -# send the page uncompressed. (Since 3.1) +# @compress-wait-thread: Controls behavior when all compression +# threads are currently busy. If true (default), wait for a free +# compression thread to become available; otherwise, send the page +# uncompressed. (Since 3.1) # # @decompress-threads: decompression thread count # -# @throttle-trigger-threshold: The ratio of bytes_dirty_period and bytes_xfer_period -# to trigger throttling. It is expressed as percentage. -# The default value is 50. (Since 5.0) +# @throttle-trigger-threshold: The ratio of bytes_dirty_period and +# bytes_xfer_period to trigger throttling. It is expressed as +# percentage. The default value is 50. (Since 5.0) # # @cpu-throttle-initial: Initial percentage of time guest cpus are -# throttled when migration auto-converge is activated. -# (Since 2.7) +# throttled when migration auto-converge is activated. (Since +# 2.7) # # @cpu-throttle-increment: throttle percentage increase each time -# auto-converge detects that migration is not making -# progress. (Since 2.7) -# -# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage -# At the tail stage of throttling, the Guest is very -# sensitive to CPU percentage while the @cpu-throttle -# -increment is excessive usually at tail stage. -# If this parameter is true, we will compute the ideal -# CPU percentage used by the Guest, which may exactly make -# the dirty rate match the dirty rate threshold. Then we -# will choose a smaller throttle increment between the -# one specified by @cpu-throttle-increment and the one -# generated by ideal CPU percentage. -# Therefore, it is compatible to traditional throttling, -# meanwhile the throttle increment won't be excessive -# at tail stage. -# The default value is false. (Since 5.1) +# auto-converge detects that migration is not making progress. +# (Since 2.7) +# +# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At +# the tail stage of throttling, the Guest is very sensitive to CPU +# percentage while the @cpu-throttle -increment is excessive +# usually at tail stage. If this parameter is true, we will +# compute the ideal CPU percentage used by the Guest, which may +# exactly make the dirty rate match the dirty rate threshold. +# Then we will choose a smaller throttle increment between the one +# specified by @cpu-throttle-increment and the one generated by +# ideal CPU percentage. Therefore, it is compatible to +# traditional throttling, meanwhile the throttle increment won't +# be excessive at tail stage. The default value is false. (Since +# 5.1) # # @tls-creds: ID of the 'tls-creds' object that provides credentials -# for establishing a TLS connection over the migration data -# channel. On the outgoing side of the migration, the credentials -# must be for a 'client' endpoint, while for the incoming side the -# credentials must be for a 'server' endpoint. -# An empty string means that QEMU will use plain text mode for -# migration, rather than TLS (Since 2.7) -# Note: 2.8 reports this by omitting tls-creds instead. -# -# @tls-hostname: hostname of the target host for the migration. This -# is required when using x509 based TLS credentials and the -# migration URI does not already include a hostname. For -# example if using fd: or exec: based migration, the -# hostname must be provided so that the server's x509 -# certificate identity can be validated. (Since 2.7) -# An empty string means that QEMU will use the hostname -# associated with the migration URI, if any. (Since 2.9) -# Note: 2.8 reports this by omitting tls-hostname instead. -# -# @tls-authz: ID of the 'authz' object subclass that provides access control -# checking of the TLS x509 certificate distinguished name. (Since -# 4.0) -# -# @max-bandwidth: to set maximum speed for migration. maximum speed in -# bytes per second. (Since 2.8) -# -# @downtime-limit: set maximum tolerated downtime for migration. maximum -# downtime in milliseconds (Since 2.8) -# -# @x-checkpoint-delay: the delay time between two COLO checkpoints. (Since 2.8) +# for establishing a TLS connection over the migration data +# channel. On the outgoing side of the migration, the credentials +# must be for a 'client' endpoint, while for the incoming side the +# credentials must be for a 'server' endpoint. An empty string +# means that QEMU will use plain text mode for migration, rather +# than TLS (Since 2.7) Note: 2.8 reports this by omitting +# tls-creds instead. +# +# @tls-hostname: hostname of the target host for the migration. This +# is required when using x509 based TLS credentials and the +# migration URI does not already include a hostname. For example +# if using fd: or exec: based migration, the hostname must be +# provided so that the server's x509 certificate identity can be +# validated. (Since 2.7) An empty string means that QEMU will use +# the hostname associated with the migration URI, if any. (Since +# 2.9) Note: 2.8 reports this by omitting tls-hostname instead. +# +# @tls-authz: ID of the 'authz' object subclass that provides access +# control checking of the TLS x509 certificate distinguished name. +# (Since 4.0) +# +# @max-bandwidth: to set maximum speed for migration. maximum speed +# in bytes per second. (Since 2.8) +# +# @downtime-limit: set maximum tolerated downtime for migration. +# maximum downtime in milliseconds (Since 2.8) +# +# @x-checkpoint-delay: the delay time between two COLO checkpoints. +# (Since 2.8) # # @block-incremental: Affects how much storage is migrated when the -# block migration capability is enabled. When false, the entire -# storage backing chain is migrated into a flattened image at -# the destination; when true, only the active qcow2 layer is -# migrated and the destination must already have access to the -# same backing chain as was used on the source. (since 2.10) +# block migration capability is enabled. When false, the entire +# storage backing chain is migrated into a flattened image at the +# destination; when true, only the active qcow2 layer is migrated +# and the destination must already have access to the same backing +# chain as was used on the source. (since 2.10) # # @multifd-channels: Number of channels used to migrate data in -# parallel. This is the same number that the -# number of sockets used for migration. -# The default value is 2 (since 4.0) +# parallel. This is the same number that the number of sockets +# used for migration. The default value is 2 (since 4.0) # # @xbzrle-cache-size: cache size to be used by XBZRLE migration. It -# needs to be a multiple of the target page size -# and a power of 2 -# (Since 2.11) +# needs to be a multiple of the target page size and a power of 2 +# (Since 2.11) # -# @max-postcopy-bandwidth: Background transfer bandwidth during postcopy. -# Defaults to 0 (unlimited). In bytes per second. -# (Since 3.0) +# @max-postcopy-bandwidth: Background transfer bandwidth during +# postcopy. Defaults to 0 (unlimited). In bytes per second. +# (Since 3.0) # -# @max-cpu-throttle: maximum cpu throttle percentage. -# Defaults to 99. -# (Since 3.1) +# @max-cpu-throttle: maximum cpu throttle percentage. Defaults to 99. +# (Since 3.1) # -# @multifd-compression: Which compression method to use. -# Defaults to none. (Since 5.0) +# @multifd-compression: Which compression method to use. Defaults to +# none. (Since 5.0) # # @multifd-zlib-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 9, where 0 means no compression, 1 means the best -# compression speed, and 9 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) +# migration, the compression level is an integer between 0 and 9, +# where 0 means no compression, 1 means the best compression +# speed, and 9 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @multifd-zstd-level: Set the compression level to be used in live -# migration, the compression level is an integer between 0 -# and 20, where 0 means no compression, 1 means the best -# compression speed, and 20 means best compression ratio which -# will consume more CPU. -# Defaults to 1. (Since 5.0) +# migration, the compression level is an integer between 0 and 20, +# where 0 means no compression, 1 means the best compression +# speed, and 20 means best compression ratio which will consume +# more CPU. Defaults to 1. (Since 5.0) # # @block-bitmap-mapping: Maps block nodes and bitmaps on them to -# aliases for the purpose of dirty bitmap migration. Such -# aliases may for example be the corresponding names on the -# opposite site. -# The mapping must be one-to-one, but not necessarily -# complete: On the source, unmapped bitmaps and all bitmaps -# on unmapped nodes will be ignored. On the destination, -# encountering an unmapped alias in the incoming migration -# stream will result in a report, and all further bitmap -# migration data will then be discarded. -# Note that the destination does not know about bitmaps it -# does not receive, so there is no limitation or requirement -# regarding the number of bitmaps received, or how they are -# named, or on which nodes they are placed. -# By default (when this parameter has never been set), bitmap -# names are mapped to themselves. Nodes are mapped to their -# block device name if there is one, and to their node name -# otherwise. (Since 5.2) +# aliases for the purpose of dirty bitmap migration. Such aliases +# may for example be the corresponding names on the opposite site. +# The mapping must be one-to-one, but not necessarily complete: On +# the source, unmapped bitmaps and all bitmaps on unmapped nodes +# will be ignored. On the destination, encountering an unmapped +# alias in the incoming migration stream will result in a report, +# and all further bitmap migration data will then be discarded. +# Note that the destination does not know about bitmaps it does +# not receive, so there is no limitation or requirement regarding +# the number of bitmaps received, or how they are named, or on +# which nodes they are placed. By default (when this parameter +# has never been set), bitmap names are mapped to themselves. +# Nodes are mapped to their block device name if there is one, and +# to their node name otherwise. (Since 5.2) # # Features: +# # @unstable: Member @x-checkpoint-delay is experimental. # # Since: 2.4 @@ -1201,7 +1185,6 @@ # "downtime-limit": 300 # } # } -# ## { 'command': 'query-migrate-parameters', 'returns': 'MigrationParameters' } @@ -1209,9 +1192,9 @@ ## # @migrate-start-postcopy: # -# Followup to a migration command to switch the migration to postcopy mode. -# The postcopy-ram capability must be set on both source and destination -# before the original migration command. +# Followup to a migration command to switch the migration to postcopy +# mode. The postcopy-ram capability must be set on both source and +# destination before the original migration command. # # Since: 2.5 # @@ -1219,7 +1202,6 @@ # # -> { "execute": "migrate-start-postcopy" } # <- { "return": {} } -# ## { 'command': 'migrate-start-postcopy' } @@ -1237,7 +1219,6 @@ # <- {"timestamp": {"seconds": 1432121972, "microseconds": 744001}, # "event": "MIGRATION", # "data": {"status": "completed"} } -# ## { 'event': 'MIGRATION', 'data': {'status': 'MigrationStatus'}} @@ -1245,8 +1226,8 @@ ## # @MIGRATION_PASS: # -# Emitted from the source side of a migration at the start of each pass -# (when it syncs the dirty bitmap) +# Emitted from the source side of a migration at the start of each +# pass (when it syncs the dirty bitmap) # # @pass: An incrementing count (starting at 1 on the first pass) # @@ -1256,7 +1237,6 @@ # # <- { "timestamp": {"seconds": 1449669631, "microseconds": 239225}, # "event": "MIGRATION_PASS", "data": {"pass": 2} } -# ## { 'event': 'MIGRATION_PASS', 'data': { 'pass': 'int' } } @@ -1268,7 +1248,8 @@ # # @checkpoint-ready: Secondary VM (SVM) is ready for checkpointing # -# @checkpoint-request: Primary VM (PVM) tells SVM to prepare for checkpointing +# @checkpoint-request: Primary VM (PVM) tells SVM to prepare for +# checkpointing # # @checkpoint-reply: SVM gets PVM's checkpoint request # @@ -1316,7 +1297,8 @@ # # @completed: finish the process of failover # -# @relaunch: restart the failover process, from 'none' -> 'completed' (Since 2.9) +# @relaunch: restart the failover process, from 'none' -> 'completed' +# (Since 2.9) # # Since: 2.8 ## @@ -1339,7 +1321,6 @@ # # <- { "timestamp": {"seconds": 2032141960, "microseconds": 417172}, # "event": "COLO_EXIT", "data": {"mode": "primary", "reason": "request" } } -# ## { 'event': 'COLO_EXIT', 'data': {'mode': 'COLOMode', 'reason': 'COLOExitReason' } } @@ -1349,9 +1330,9 @@ # # The reason for a COLO exit. # -# @none: failover has never happened. This state does not occur -# in the COLO_EXIT event, and is only visible in the result of -# query-colo-status. +# @none: failover has never happened. This state does not occur in +# the COLO_EXIT event, and is only visible in the result of +# query-colo-status. # # @request: COLO exit is due to an external request. # @@ -1367,12 +1348,14 @@ ## # @x-colo-lost-heartbeat: # -# Tell qemu that heartbeat is lost, request it to do takeover procedures. -# If this command is sent to the PVM, the Primary side will exit COLO mode. -# If sent to the Secondary, the Secondary side will run failover work, -# then takes over server operation to become the service VM. +# Tell qemu that heartbeat is lost, request it to do takeover +# procedures. If this command is sent to the PVM, the Primary side +# will exit COLO mode. If sent to the Secondary, the Secondary side +# will run failover work, then takes over server operation to become +# the service VM. # # Features: +# # @unstable: This command is experimental. # # Since: 2.8 @@ -1381,7 +1364,6 @@ # # -> { "execute": "x-colo-lost-heartbeat" } # <- { "return": {} } -# ## { 'command': 'x-colo-lost-heartbeat', 'features': [ 'unstable' ] } @@ -1393,7 +1375,8 @@ # # Returns: nothing on success # -# Notes: This command succeeds even if there is no migration process running. +# Notes: This command succeeds even if there is no migration process +# running. # # Since: 0.14 # @@ -1401,7 +1384,6 @@ # # -> { "execute": "migrate_cancel" } # <- { "return": {} } -# ## { 'command': 'migrate_cancel' } @@ -1435,8 +1417,8 @@ # # @inc: incremental disk copy migration # -# @detach: this argument exists only for compatibility reasons and -# is ignored by QEMU +# @detach: this argument exists only for compatibility reasons and is +# ignored by QEMU # # @resume: resume one paused migration, default "off". (since 3.0) # @@ -1446,19 +1428,19 @@ # # Notes: # -# 1. The 'query-migrate' command should be used to check migration's progress -# and final result (this information is provided by the 'status' member) +# 1. The 'query-migrate' command should be used to check migration's +# progress and final result (this information is provided by the +# 'status' member) # # 2. All boolean arguments default to false # -# 3. The user Monitor's "detach" argument is invalid in QMP and should not -# be used +# 3. The user Monitor's "detach" argument is invalid in QMP and should +# not be used # # Example: # # -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } } # <- { "return": {} } -# ## { 'command': 'migrate', 'data': {'uri': 'str', '*blk': 'bool', '*inc': 'bool', @@ -1467,11 +1449,11 @@ ## # @migrate-incoming: # -# Start an incoming migration, the qemu must have been started -# with -incoming defer +# Start an incoming migration, the qemu must have been started with +# -incoming defer # # @uri: The Uniform Resource Identifier identifying the source or -# address to listen on +# address to listen on # # Returns: nothing on success # @@ -1479,12 +1461,12 @@ # # Notes: # -# 1. It's a bad idea to use a string for the uri, but it needs to stay -# compatible with -incoming and the format of the uri is already exposed -# above libvirt. +# 1. It's a bad idea to use a string for the uri, but it needs +# to stay compatible with -incoming and the format of the uri +# is already exposed above libvirt. # -# 2. QEMU must be started with -incoming defer to allow migrate-incoming to -# be used. +# 2. QEMU must be started with -incoming defer to allow +# migrate-incoming to be used. # # 3. The uri format is the same as for -incoming # @@ -1493,22 +1475,21 @@ # -> { "execute": "migrate-incoming", # "arguments": { "uri": "tcp::4446" } } # <- { "return": {} } -# ## { 'command': 'migrate-incoming', 'data': {'uri': 'str' } } ## # @xen-save-devices-state: # -# Save the state of all devices to file. The RAM and the block devices -# of the VM are not saved by this command. +# Save the state of all devices to file. The RAM and the block +# devices of the VM are not saved by this command. # # @filename: the file to save the state of the devices to as binary -# data. See xen-save-devices-state.txt for a description of the binary -# format. +# data. See xen-save-devices-state.txt for a description of the +# binary format. # -# @live: Optional argument to ask QEMU to treat this command as part of a live -# migration. Default to true. (since 2.11) +# @live: Optional argument to ask QEMU to treat this command as part +# of a live migration. Default to true. (since 2.11) # # Returns: Nothing on success # @@ -1519,7 +1500,6 @@ # -> { "execute": "xen-save-devices-state", # "arguments": { "filename": "/tmp/save" } } # <- { "return": {} } -# ## { 'command': 'xen-save-devices-state', 'data': {'filename': 'str', '*live':'bool' } } @@ -1540,19 +1520,18 @@ # -> { "execute": "xen-set-global-dirty-log", # "arguments": { "enable": true } } # <- { "return": {} } -# ## { 'command': 'xen-set-global-dirty-log', 'data': { 'enable': 'bool' } } ## # @xen-load-devices-state: # -# Load the state of all devices from file. The RAM and the block devices -# of the VM are not loaded by this command. +# Load the state of all devices from file. The RAM and the block +# devices of the VM are not loaded by this command. # # @filename: the file to load the state of the devices from as binary -# data. See xen-save-devices-state.txt for a description of the binary -# format. +# data. See xen-save-devices-state.txt for a description of the +# binary format. # # Since: 2.7 # @@ -1561,7 +1540,6 @@ # -> { "execute": "xen-load-devices-state", # "arguments": { "filename": "/tmp/resume" } } # <- { "return": {} } -# ## { 'command': 'xen-load-devices-state', 'data': {'filename': 'str'} } @@ -1574,8 +1552,8 @@ # # @primary: true for primary or false for secondary. # -# @failover: true to do failover, false to stop. but cannot be -# specified if 'enable' is true. default value is false. +# @failover: true to do failover, false to stop. but cannot be +# specified if 'enable' is true. default value is false. # # Returns: nothing. # @@ -1598,8 +1576,8 @@ # # @error: true if an error happened, false if replication is normal. # -# @desc: the human readable error description string, when -# @error is 'true'. +# @desc: the human readable error description string, when @error is +# 'true'. # # Since: 2.9 ## @@ -1647,12 +1625,12 @@ # # The result format for 'query-colo-status'. # -# @mode: COLO running mode. If COLO is running, this field will return -# 'primary' or 'secondary'. +# @mode: COLO running mode. If COLO is running, this field will +# return 'primary' or 'secondary'. # -# @last-mode: COLO last running mode. If COLO is running, this field -# will return same like mode field, after failover we can -# use this field to get last colo mode. (since 4.0) +# @last-mode: COLO last running mode. If COLO is running, this field +# will return same like mode field, after failover we can use this +# field to get last colo mode. (since 4.0) # # @reason: describes the reason for the COLO exit. # @@ -1720,9 +1698,9 @@ # @UNPLUG_PRIMARY: # # Emitted from source side of a migration when migration state is -# WAIT_UNPLUG. Device was unplugged by guest operating system. -# Device resources in QEMU are kept on standby to be able to re-plug it in case -# of migration failure. +# WAIT_UNPLUG. Device was unplugged by guest operating system. Device +# resources in QEMU are kept on standby to be able to re-plug it in +# case of migration failure. # # @device-id: QEMU device id of the unplugged device # @@ -1733,7 +1711,6 @@ # <- { "event": "UNPLUG_PRIMARY", # "data": { "device-id": "hostdev0" }, # "timestamp": { "seconds": 1265044230, "microseconds": 450486 } } -# ## { 'event': 'UNPLUG_PRIMARY', 'data': { 'device-id': 'str' } } @@ -1761,7 +1738,8 @@ # # @measuring: the dirtyrate thread is measuring. # -# @measured: the dirtyrate thread has measured and results are available. +# @measured: the dirtyrate thread has measured and results are +# available. # # Since: 5.2 ## @@ -1789,24 +1767,24 @@ # # Information about current dirty page rate of vm. # -# @dirty-rate: an estimate of the dirty page rate of the VM in units of -# MB/s, present only when estimating the rate has completed. +# @dirty-rate: an estimate of the dirty page rate of the VM in units +# of MB/s, present only when estimating the rate has completed. # # @status: status containing dirtyrate query status includes -# 'unstarted' or 'measuring' or 'measured' +# 'unstarted' or 'measuring' or 'measured' # # @start-time: start time in units of second for calculation # # @calc-time: time in units of second for sample dirty pages # -# @sample-pages: page count per GB for sample dirty pages -# the default value is 512 (since 6.1) +# @sample-pages: page count per GB for sample dirty pages the default +# value is 512 (since 6.1) # # @mode: mode containing method of calculate dirtyrate includes -# 'page-sampling' and 'dirty-ring' (Since 6.2) +# 'page-sampling' and 'dirty-ring' (Since 6.2) # -# @vcpu-dirty-rate: dirtyrate for each vcpu if dirty-ring -# mode specified (Since 6.2) +# @vcpu-dirty-rate: dirtyrate for each vcpu if dirty-ring mode +# specified (Since 6.2) # # Since: 5.2 ## @@ -1826,11 +1804,11 @@ # # @calc-time: time in units of second for sample dirty pages # -# @sample-pages: page count per GB for sample dirty pages -# the default value is 512 (since 6.1) +# @sample-pages: page count per GB for sample dirty pages the default +# value is 512 (since 6.1) # -# @mode: mechanism of calculating dirtyrate includes -# 'page-sampling' and 'dirty-ring' (Since 6.1) +# @mode: mechanism of calculating dirtyrate includes 'page-sampling' +# and 'dirty-ring' (Since 6.1) # # Since: 5.2 # @@ -1839,7 +1817,6 @@ # -> {"execute": "calc-dirty-rate", "arguments": {"calc-time": 1, # 'sample-pages': 512} } # <- { "return": {} } -# ## { 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64', '*sample-pages': 'int', @@ -1862,12 +1839,11 @@ # @cpu-index: index of a virtual CPU. # # @limit-rate: upper limit of dirty page rate (MB/s) for a virtual -# CPU, 0 means unlimited. +# CPU, 0 means unlimited. # # @current-rate: current dirty page rate (MB/s) for a virtual CPU. # # Since: 7.1 -# ## { 'struct': 'DirtyLimitInfo', 'data': { 'cpu-index': 'int', @@ -1879,9 +1855,9 @@ # # Set the upper limit of dirty page rate for virtual CPUs. # -# Requires KVM with accelerator property "dirty-ring-size" set. -# A virtual CPU's dirty page rate is a measure of its memory load. -# To observe dirty page rates, use @calc-dirty-rate. +# Requires KVM with accelerator property "dirty-ring-size" set. A +# virtual CPU's dirty page rate is a measure of its memory load. To +# observe dirty page rates, use @calc-dirty-rate. # # @cpu-index: index of a virtual CPU, default is all. # @@ -1895,7 +1871,6 @@ # "arguments": { "dirty-rate": 200, # "cpu-index": 1 } } # <- { "return": {} } -# ## { 'command': 'set-vcpu-dirty-limit', 'data': { '*cpu-index': 'int', @@ -1907,7 +1882,7 @@ # Cancel the upper limit of dirty page rate for virtual CPUs. # # Cancel the dirty page limit for the vCPU which has been set with -# set-vcpu-dirty-limit command. Note that this command requires +# set-vcpu-dirty-limit command. Note that this command requires # support from dirty ring, same as the "set-vcpu-dirty-limit". # # @cpu-index: index of a virtual CPU, default is all. @@ -1919,7 +1894,6 @@ # -> {"execute": "cancel-vcpu-dirty-limit"}, # "arguments": { "cpu-index": 1 } } # <- { "return": {} } -# ## { 'command': 'cancel-vcpu-dirty-limit', 'data': { '*cpu-index': 'int'} } @@ -1927,7 +1901,8 @@ ## # @query-vcpu-dirty-limit: # -# Returns information about virtual CPU dirty page rate limits, if any. +# Returns information about virtual CPU dirty page rate limits, if +# any. # # Since: 7.1 # @@ -1937,7 +1912,6 @@ # <- {"return": [ # { "limit-rate": 60, "current-rate": 3, "cpu-index": 0}, # { "limit-rate": 60, "current-rate": 3, "cpu-index": 1}]} -# ## { 'command': 'query-vcpu-dirty-limit', 'returns': [ 'DirtyLimitInfo' ] } @@ -1977,20 +1951,24 @@ # Save a VM snapshot # # @job-id: identifier for the newly created job +# # @tag: name of the snapshot to create +# # @vmstate: block device node name to save vmstate to +# # @devices: list of block device node names to save a snapshot to # # Applications should not assume that the snapshot save is complete -# when this command returns. The job commands / events must be used -# to determine completion and to fetch details of any errors that arise. +# when this command returns. The job commands / events must be used +# to determine completion and to fetch details of any errors that +# arise. # -# Note that execution of the guest CPUs may be stopped during the -# time it takes to save the snapshot. A future version of QEMU -# may ensure CPUs are executing continuously. +# Note that execution of the guest CPUs may be stopped during the time +# it takes to save the snapshot. A future version of QEMU may ensure +# CPUs are executing continuously. # -# It is strongly recommended that @devices contain all writable -# block device nodes if a consistent snapshot is required. +# It is strongly recommended that @devices contain all writable block +# device nodes if a consistent snapshot is required. # # If @tag already exists, an error will be reported # @@ -2047,20 +2025,24 @@ # Load a VM snapshot # # @job-id: identifier for the newly created job +# # @tag: name of the snapshot to load. +# # @vmstate: block device node name to load vmstate from +# # @devices: list of block device node names to load a snapshot from # # Applications should not assume that the snapshot load is complete -# when this command returns. The job commands / events must be used -# to determine completion and to fetch details of any errors that arise. +# when this command returns. The job commands / events must be used +# to determine completion and to fetch details of any errors that +# arise. # # Note that execution of the guest CPUs will be stopped during the # time it takes to load the snapshot. # -# It is strongly recommended that @devices contain all writable -# block device nodes that can have changed since the original -# @snapshot-save command execution. +# It is strongly recommended that @devices contain all writable block +# device nodes that can have changed since the original @snapshot-save +# command execution. # # Returns: nothing # @@ -2115,12 +2097,15 @@ # Delete a VM snapshot # # @job-id: identifier for the newly created job +# # @tag: name of the snapshot to delete. +# # @devices: list of block device node names to delete a snapshot from # # Applications should not assume that the snapshot delete is complete -# when this command returns. The job commands / events must be used -# to determine completion and to fetch details of any errors that arise. +# when this command returns. The job commands / events must be used +# to determine completion and to fetch details of any errors that +# arise. # # Returns: nothing # |