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Which order of snapshots to safely delet

Posted by Anonymous 
Which order of snapshots to safely delet
August 24, 2007 07:45AM
On Fri, Aug 24, 2007 at 11:57:03AM +0100, Dan Hawker wrote:
[quote]So, in which order can I kill off backups??? I presume in reverse obvious
order (monthly.2 downwards, weekly.3 downwards and daily.4 downwards),
however am just checking really as I don't want to go deleting older
snapshots to later find that some are used by newer snapshots hard-linking
back. Am pretty sure this won't happen, but thought I'd check before doing
the dirty deed.
[/quote]
At the filesystem level there is no hierarchy of hard links. Every link
to a file has equal "ownership" of it, and as long as a single link exists
the file is accessible.

Rich

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Which order of snapshots to safely delet
August 24, 2007 03:45AM
Hi All,
Am sure I&#39;m missing something easy here, but here goes anyway...
I backup around 8 servers to a separate backup server via rsnapshot. Works fine, no problems.
I&#39;m running out of diskspace and as such need to ammend my schedule accordingly. Presently my schedule is 5xdaily, 4xweekly and 3xmonthly. They run every mon-fri, every sat and 1st sun respectively.
Unfortunately, its about to hit the limits of my 2.3TB disk on my backup server, so need to prune some existing snapshots whilst I re-examine the schedule (probably cut down the number of weekly and monthly snaps)
So, in which order can I kill off backups??? I presume in reverse obvious order (monthly.2 downwards, weekly.3 downwards and daily.4 downwards), however am just checking really as I don&#39;t want to go deleting older snapshots to later find that some are used by newer snapshots hard-linking back. Am pretty sure this won&#39;t happen, but thought I&#39;d check before doing the dirty deed.
TIA
Dan
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Dan Hawker
Linux System Administrator
Astrium
[url=http://www.astrium.eads.net/]http://www.astrium.eads.net[/url]
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