Hi folks,
I have been reading through the earlier thread entitled 'accelerating
"cp -al" under nfs', and although it's not quite our use case, it does
discuss the same issue which we are facing: speed.
In brief, our set up involves a backup machine running rsnapshot pulling
backups together from various other machines into one place. We have a
post-exec script which then rsyncs the whole rsnapshot backup tree to an
external, encrypted RDX cartridge.
The problem is that rsync of the whole tree is quite time consuming
(rsnapshot part of the backup takes ~ 1 hour in total, rsync to
encrypted media, ~ 7 hours).
My initial thoughts were to effectively replay the rsnapshot commands
(cp/mv/rm) to the RDX cartridge, followed by a final rsync of just
daily.0, which should then be somewhat faster.
However, short of parsing the logfile, there doesn't appear to be a way
to do this. All of the internal commands can be wrapped in scripts,
except there is no cmd_mv option, so going the wrapper route is out.
Another possibility might be to have the external cartridge managed by a
separate rsnapshot process which backs up from daily.0? Would this be
reliable and give good data consistency? If so, would this work well for
remote/off-site backups of the primary backup tree too?
Thanks in advance!
--
Miah Gregory
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