On 04/01/2015 05:22 AM, Simon Barrett wrote:
Hi all,
Is there any reason why I should not create snapshot a ploop-backed
container each day (or hour, for that matter) then merge all
outstanding snapshots at the end of the week (vzctl snapshot-delete)
and compact it? This would allow me to do efficient incremental
backups to back up (using bacula, in this case) and I would imagine
it's a core use case.
Are there any potential risks to be aware of (performance issues,
storage usage, corruption exposure)?
I am not aware of any, except a limitation of no more than 126 deltas
mounted
(i.e. the distance from top to base delta should be < 127). If you try
to hit the limit,
snapshot won't be created. So, hourly snapshots with weekly delete won't
work, as
24*7 > 127.
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