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Christopher Derr wrote:
> We're a mid-sized university academic department and are fairly happy
> with our current BackupPC setup. We currently backup an 800 GB
> fileserver (which has an iSCSI-attached drive), a few other sub-300 GB
> fileservers, a bunch of XP desktops. The 800 GB fileserver takes a long
> time to back up...almost a full day, and I think this is normal for
> BackupPC. We'd like to use BackupPC to backup some of our heftier linux
> servers -- moving into the multiple terabyte range (5-10 TB). We're
> considering a ZFS filesystem over gigabit for our backup target, but
> obviously are concerned that backing up 5 TB of data would take a week.
>
> Is this where we should consider multiple BackupPC servers to break up
> the backup time? Should we move to a solution with less overhead (if
> there is one)? Thanks for any input or experiences.
You haven't specified your backup method, but I'll make a couple of
assumptions:
* you are using rsync over SSH
If your 800G file server is taking 24 hours per backup, there are
probably some optimisations you can make. Firstly, check if either your
backup server or file server are consuming all available memory and
swapping during the backup. Adding some extra RAM will drastically
reduce the backup time. The other issue is the size of the files on your
fileserver, lots of small files will take longer than lots of small files.
Other than that, you can look at IO etc on both fileserver and backup
server. Probably your bigger fileservers are faster, but you backup
server is only so fast... Examine where the bottlenecks are, and then
you can either remove/improve those bottlenecks, or else add additional
backuppc servers (if the backup server is the bottleneck and removing it
is too costly).
Gotta go, hopefully someone else will add some other suggestions.
Regards,
Adam
Adam Goryachev
Website Managers
Ph: +61 2 8304 0000 adam AT websitemanagers.com DOT
au
Fax: +61 2 8304 0001 www.websitemanagers.com.au
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