24 Mar
2011
24 Mar
'11
11:38 a.m.
Hi Adam,
On Thu, Mar 24, 2011 at 11:26:53AM +0000, Adam Spiers wrote:
This is great - thanks! However I'm struggling to
understand the
numbers shown. On my VPS I see hourly snapshots consuming 2.5GB -
what does this mean exactly? Presumably not that my VPS is churning
that much data per hour, because it should be idle most of the time
AFAIK.
You refer to the differential report, so there are ~2.5GiB of diffs
per snapshot. Since the per-snapshot report shows each snapshot
coming in at ~9.5GiB that means you have the same amount of files
but with ~2.5GiB changing content every time.
Bear in mind that any time a file changes (even if it's just
metadata), a copy of both the old and new version will be stored in
their entirety.
I can have a look and see what I can make of it if you like. I'd
rather not look at customer data without permission.
If you want to look yourself, look for files that change metadata
(mtime, ownership) all the time, like if they're being checked out
of version control or downloaded from somewhere without preserving
mtimes. Something like that.
Normally you'd use rsnapshot-diff on two of the snapshot directories
to see what has changed, but I don't think that'll work with NFS
since it probably relies on detecting the hardlinks.
Cheers,
Andy
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