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authorPaolo Bonzini <pbonzini@redhat.com>2013-01-21 17:09:46 +0100
committerKevin Wolf <kwolf@redhat.com>2013-01-25 18:18:34 +0100
commiteee13dfe302833944d1176677d12a6ea421a94ea (patch)
tree53581a0a6c022df243eabdf32cf8e03232113c1c /qapi-schema.json
parent50717e941b9f306a45292621999eeafbaa954418 (diff)
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mirror: allow customizing the granularity
The desired granularity may be very different depending on the kind of operation (e.g. continuous replication vs. collapse-to-raw) and whether the VM is expected to perform lots of I/O while mirroring is in progress. Allow the user to customize it, while providing a sane default so that in general there will be no extra allocated space in the target compared to the source. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi-schema.json')
-rw-r--r--qapi-schema.json8
1 files changed, 7 insertions, 1 deletions
diff --git a/qapi-schema.json b/qapi-schema.json
index ce4f901..fd5ec93 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1636,6 +1636,11 @@
# (all the disk, only the sectors allocated in the topmost image, or
# only new I/O).
#
+# @granularity: #optional granularity of the dirty bitmap, default is 64K
+# if the image format doesn't have clusters, 4K if the clusters
+# are smaller than that, else the cluster size. Must be a
+# power of 2 between 512 and 64M (since 1.4).
+#
# @on-source-error: #optional the action to take on an error on the source,
# default 'report'. 'stop' and 'enospc' can only be used
# if the block device supports io-status (see BlockInfo).
@@ -1652,7 +1657,8 @@
{ 'command': 'drive-mirror',
'data': { 'device': 'str', 'target': 'str', '*format': 'str',
'sync': 'MirrorSyncMode', '*mode': 'NewImageMode',
- '*speed': 'int', '*on-source-error': 'BlockdevOnError',
+ '*speed': 'int', '*granularity': 'uint32',
+ '*on-source-error': 'BlockdevOnError',
'*on-target-error': 'BlockdevOnError' } }
##