diff options
| author | John Snow <jsnow@redhat.com> | 2019-07-29 16:35:53 -0400 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2019-08-16 16:28:02 -0400 |
| commit | c23909e5301b506bc9a59d178129cfdf6b75bda7 (patch) | |
| tree | 1e4de90868d45d33c854e92a5817e20a7a27f04d /qapi | |
| parent | 62aa1fbeac5922240fedd22b435024a3b96cbc8f (diff) | |
| download | qemu-c23909e5301b506bc9a59d178129cfdf6b75bda7.zip qemu-c23909e5301b506bc9a59d178129cfdf6b75bda7.tar.gz qemu-c23909e5301b506bc9a59d178129cfdf6b75bda7.tar.bz2 | |
block/backup: add 'always' bitmap sync policy
This adds an "always" policy for bitmap synchronization. Regardless of if
the job succeeds or fails, the bitmap is *always* synchronized. This means
that for backups that fail part-way through, the bitmap retains a record of
which sectors need to be copied out to accomplish a new backup using the
old, partial result.
In effect, this allows us to "resume" a failed backup; however the new backup
will be from the new point in time, so it isn't a "resume" as much as it is
an "incremental retry." This can be useful in the case of extremely large
backups that fail considerably through the operation and we'd like to not waste
the work that was already performed.
Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190709232550.10724-13-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index 06e3448..8344fbe 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1149,10 +1149,13 @@ # @never: The bitmap is never synchronized with the operation, and is # treated solely as a read-only manifest of blocks to copy. # +# @always: The bitmap is always synchronized with the operation, +# regardless of whether or not the operation was successful. +# # Since: 4.2 ## { 'enum': 'BitmapSyncMode', - 'data': ['on-success', 'never'] } + 'data': ['on-success', 'never', 'always'] } ## # @MirrorCopyMode: |