[EMAIL PROTECTED] wrote on 09/25/2008 05:30:04 AM:
> On Thu, 2008-09-25 at 12:07 +0200, [EMAIL PROTECTED] wrote:
> > On Thu, Sep 25, 2008 at 11:43:51AM +0200, Nils Goroll wrote:
>
> > Storage Checkpoints in Veritas software has this feature (removing
> > the oldest checkpoint in case of 100% filesystem usage) by default.
> > Why not add such option to ZFS ?
>
> - because we shouldn't assume a user's intentions - some would consider
> automatic destruction of data (even historical data) a p1 bug.
>
> nv_100 will have the ZFS Automatic Snapshot service in it, disabled by
> default[1]
>
> The GUI side of this, ("Time Slider") has exactly this functionality -
> it'll start deleting snapshots that it has taken when the filesystem
> reaches a certain threshold.
>
> More details at:
> http://opensolaris.org/os/community/arc/caselog/2008/571/mail
>
> cheers,
> tim
>
> [1] actually while I'm here, quick poll - the schedules for retaining
> snapshots currently are:
>
> - Frequent snapshots, taken every 15 minutes, keeping the 4 most recent
> - Hourly snapshots taken once every hour, keeping 24
> - Daily snapshots taken once every 24 hours, keeping 7
> - Weekly snapshots taken once every 7 days, keeping 4
> - Monthly snapshots taken on the first day of every month, keeping 12
>
> I'm arguing that we should be keeping 31 daily snapshots, and not just
> 7. There's some overlap with the weekly ones yes, but the extra
> granularity over the past month could be useful, anyone else have an
> opinion?
Tim,
That snap schedule seems reasonable to me. Relate to the cleanup part
of the doc linked, do you know the rational for killing off the most recent
(15 minute and hourly) snaps vs the oldest (monthly) first?
To me, it seems like the biggest bang for the buck (snapshot held data)
would be killing off (oldest) monthly, weekly, hourly, daily, hourly, 15 in
that order. Also I guess user case in my mind would leave a desktop user
more likely to need access to a few minutes, hours or days ago then 12
months ago.
-Wade
>
>
> _______________________________________________
> zfs-discuss mailing list
> zfs-discuss@opensolaris.org
> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
