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Nils Breunese (Lemonbit) wrote:
> It might be because BackupPC doesn't run the equivalent of rsync
> -auv. See $Conf{RsyncArgs} in your config.pl for the options used
> and remember rsync is talking to BackupPC's rsync interface, not a
> stock rsync.
The RsyncArgs do about the same as rsync -auH --numeric-ids, so that's
not much difference.
> There's much more going on: the compression, the checksumming, the
> pooling, the nightly jobs
AFAIK is that server side stuff, and not network stuff.
> (if your backup job really needs two days then it probably gets in
> the way of the nightly jobs), that's all not happening when you run
> a plain rsync -auv. The traffic shouldn't be much higher though
> (after the initial backup of course), I think.
Nightly jobs rarely run, as 5 backups run continuously (and 75 run
normally).
> Could you give us some numbers? How much traffic are you seeing for
> a BackupPC backup compared to a 'plain rsync'?
Full backup, run for the 2nd time today (no changes in files):
- - BackupPC full dump : killed it after 30mins, as it pulled all data
again (2.8GB)
- - rsync -auvH --numeric-ids : 15s (as nothing changed)
Total backup size on disk: 2800MB
> P.S. You might want to check out rdiff-backup
> (http://www.nongnu.org/rdiff-backup/) if you're looking for an
> rsync style incremental backup tool and don't need the compression,
> pooling, rotation and web interface that BackupPC gets you out of
> the box.
Well, we need the web interface of BackupPC, we need the reporting
functionality of BackupPC, but we like to to be more bandwidth efficient.
Maybe I'll write an Xfer module that uses plain rsync ...
- --
Toni Van Remortel
Linux System Engineer @ Precision Operations NV
+32 3 451 92 26 - [EMAIL PROTECTED]
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