On Sat, 01/30 13:56, Vladimir Sementsov-Ogievskiy wrote:
> Hi all.
>
> These series which aims to add external backup api. This is needed to allow
> backup software use our dirty bitmaps.
>
> Vmware and Parallels Cloud Server have this feature.
What is the advantage of this appraoch over "drive-backup sync=incremental
..."?
>
> There are three things are done:
> - add query-block-dirty-bitmap-ranges qmp command
> - add qmp commands for dirty-bitmap functions: create_successor, abdicate,
> reclaim.
> - make create-successor command transaction-able
>
> Then, external backup should be done like this:
>
> 1. qmp transaction {
> external-snapshot
> bitmap-create-successor
> }
>
> 2. qmp query frozen bitmap, not acquiring aio context.
What do you do with the query response, read the snapshot image with an
external tool?
Fam
>
> 3. do external backup, using snapshot and bitmap
>
>
> 4. if (success backup)
> qmp bitmap-abdicate
> else
> qmp bitmap-reclaime
>
> 5. qmp merge snapshot
>
>
> v2: a lot of additions and changes, no sense to compare with v1
>
>
> Vladimir Sementsov-Ogievskiy (6):
> block dirty bitmap: add next_zero function
> qmp: add query-block-dirty-bitmap-ranges
> iotests: test query-block-dirty-bitmap-ranges
> qapi: add qmp commands for some dirty bitmap functions
> qapi: make block-dirty-bitmap-create-successor transaction-able
> iotests: test external backup api
>
> block/dirty-bitmap.c | 60 ++++++++++++++++++++++
> blockdev.c | 113 +++++++++++++++++++++++++++++++++++++++++
> include/block/dirty-bitmap.h | 9 ++++
> include/qemu/hbitmap.h | 8 +++
> qapi-schema.json | 4 +-
> qapi/block-core.json | 90 +++++++++++++++++++++++++++++++++
> qmp-commands.hx | 118
> +++++++++++++++++++++++++++++++++++++++++++
> tests/qemu-iotests/150 | 88 ++++++++++++++++++++++++++++++++
> tests/qemu-iotests/150.out | 21 ++++++++
> tests/qemu-iotests/151 | 77 ++++++++++++++++++++++++++++
> tests/qemu-iotests/151.out | 7 +++
> tests/qemu-iotests/group | 2 +
> util/hbitmap.c | 26 ++++++++++
> 13 files changed, 622 insertions(+), 1 deletion(-)
> create mode 100755 tests/qemu-iotests/150
> create mode 100644 tests/qemu-iotests/150.out
> create mode 100755 tests/qemu-iotests/151
> create mode 100644 tests/qemu-iotests/151.out
>
> --
> 1.8.3.1
>
