An incremental backup is useful to reduce backup data size. This
series adds support for vdi backup and restore commands. With theses
patches, we can create incremental backup files between snapshots as
follows.
$ collie vdi create test 4G
$ echo snap1 | collie vdi write test 0 512
$ collie vdi snapshot test -s snap1
$ echo snap2 | collie vdi write test 0 512
$ collie vdi snapshot test -s snap2
(create an incremental backup between snap1 and snap2)
$ collie vdi backup test -F snap1 -s snap2 /tmp/backup
$ collie vdi list
Name Id Size Used Shared Creation time VDI id Copies Tag
s test 1 4.0 GB 4.0 MB 0.0 MB 2012-09-10 01:27 7c2b25 1 snap1
s test 2 4.0 GB 4.0 MB 0.0 MB 2012-09-10 01:28 7c2b26 1 snap2
test 3 4.0 GB 0.0 MB 4.0 MB 2012-09-10 01:28 7c2b27 1
(restore vdi with the backup file)
$ collie vdi restore test -s snap1 /tmp/backup
restoring /tmp/backup... done
(restored image is created as a new snapshot [id=3])
$ collie vdi tree
test---[2012-09-10 01:27]-+-[2012-09-10 01:28]---(you are here)
`-[2012-09-10 01:29]
$ collie vdi list
Name Id Size Used Shared Creation time VDI id Copies Tag
s test 1 4.0 GB 4.0 MB 0.0 MB 2012-09-10 01:27 7c2b25 1 snap1
s test 2 4.0 GB 4.0 MB 0.0 MB 2012-09-10 01:28 7c2b26 1 snap2
s test 3 4.0 GB 4.0 MB 0.0 MB 2012-09-10 01:29 7c2b28 1
test 4 4.0 GB 0.0 MB 4.0 MB 2012-09-10 01:29 7c2b29 1
$ collie vdi read test 0 512 -s 3
snap2
Thanks,
Kazutaka
MORITA Kazutaka (4):
collie: add helper function to read vdi objects
collie: add vdi backup support
collie: vdi restore support
tests: add test to check vdi backup and restore
collie/common.c | 2 +
collie/vdi.c | 516 +++++++++++++++++++++++++++++++++++++++++++------------
man/collie.8 | 6 +
tests/041 | 72 ++++++++
tests/041.out | 64 +++++++
tests/group | 1 +
6 files changed, 549 insertions(+), 112 deletions(-)
create mode 100755 tests/041
create mode 100644 tests/041.out
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1.7.2.5
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