On 6/13/23 01:43, Randy Dunlap wrote:
>> +config BLKSNAP
>> + tristate "Block Devices Snapshots Module (blksnap)"
>> + help
>> + Allow to create snapshots and track block changes for block devices.
>> + Designed for creating backups for simple block devices. Snapshots are
>> + temporary and are released then backup is completed. Change block
> when backup is completed.
>
> or is the order of operations as listed: release snapshots and then backup
> can be completed?
>
>> + tracking allows to create incremental or differential backups.
"when backup is completed." - it will be more correct.
Normal backup process:
Take snapshot Release snapshot
| Start backup Finish backup |
| | Copy data from snapshot images | |
------------------------------------------------------------------------->
t
In case of failure, for example, when the snapshot is overflowing:
The snapshot is corrupted
Take snapshot | Release snapshot
| Start backup | | Finish failed backup
| | Copy data from snapshot images | | |
------------------------------------------------------------------------->
t
