DragonFly users List (threaded) for 2010-04
Re: Snapshots ordering on slave and pfs according to freequency for snapshot management
:> Yeah, I'm in full agreement with you.
:> I think I was a bit misanderstood: Hammer performance is *much better* than
:> rsnapshot (obviously) but there is no way to easily tell it to keep its
:> snapshot distribution in different intervals for archiving purposes.
:> This is the one thing rsnapshot does extremely well; I was just trying to say
:> this is a good idea we should steal :-)
:hope Matt will agree ;-)
A more complex snapshot retention scheme would be a nice project for
someone. The hammer config file is just a block of text so it is
possible to add pretty much whatever we want to it, with accompanying
If someone wants to take on this project I think it could be integrated
into the hammer cleanup code fairly easily by having the hammer cleanup
field classify the snapshots it makes itself using the comment field,
and then parsing that field to figure out cleanup intervals.
This is the kind of format I would recommend for the config entry:
snapshots 5m 5d
snapshots 1d 60d
snapshots 1w 2y
e.g. the above would mean: Keep 5-minute snapshots for 5 days,
daily snapshots for 60 days, and weekly snapshots for two years.
(NOTE: This might not actually be viable, it is just an example,
as you would have to have quite a bit of storage to keep weekly's
hammer could track the snapshots independently, even if they overlap,
by using the comment field to distinguish them. It could then use the
comment field when doing the prune to figure out which snapshots line