Re: disk-disk-tape best practices
2007-03-01 13:25:52
On Thu, Mar 01, 2007 at 12:53:43PM -0500, Alastair Neil enlightened us:
> My experience with amanda in the past is that it will not write level 0
> dumps only to holding space - is this incorrect? If this is the case then
> indeed my configuration is overly complicated. I have in the past
> maintained a 9 months backup history - that would be about 270 tapes - a lot
> of LTO2 media. I didn't mention but we are an academic environment so this
> starts to become cost prohibitive, as it is I was looking at only providing
> a semester ~ 3month backup window going forward.
>
It most certainly does store level 0's to holding disk. I also am
educational and have an LTO2 setup. My weekly backups are currently about
150GB, so I let them spool on a RAID1 holding disk for a week, then put a
tape in and let them autoflush on the 7th day. I have a rotating set of
tapes for 20 weeks, and do an archival dump quarterly.
You probably just need to adjust your reserve parameter properly in
amanda.conf. The default is 100% is reserved for degraded-mode backups. Set
it to something smaller to allow fulls to fit.
Matt
--
Matt Hyclak
Department of Mathematics
Department of Social Work
Ohio University
(740) 593-1263
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