Re: [BackupPC-users] Performance reference (linux --(rsync)-> linux)

Hi Cassiano

On Tue, 6 Nov 2012 10:03:44 +0000
Cassiano Surek <cass AT surek.co DOT uk> wrote:

> Of course, how could I have missed that! I did find it now, thanks
> Michał.
> 
> Last full backup (of 100 odd Gb) took slightly north of 10 days to
> complete. Incremental, just over 5 days.

That seems rather slow. I have BackupPC 3.2.1
runing on Centos 5.8 (rsync 3.0.6) that is backing up 18 hosts most of
which are backed up over a 300 mbps wireless link. The largest of these
hosts is a linux file server (Ubuntu 10.04 rsync 3.0.7) with about 1 TB
of files that are backed up. The last full backup for this server had a
speed of 22.28 MB/s and a duration of 772 minutes new files was 61 GB
in size probably about 60 GB of this would have been a single exchange
ntbackup file with about 1.3 GB worth of other files from the various
user shares. As a result of the large ntbackup files the incrementals
can take nearly as long as a full backup. The last one for example had a
duration of 757 minutes speed 1.58 MB/s and new files size of 71 GB

The specs for the Backup Server are:
2.5 Ghz Xeon X3320, 4 GB Ram, file system is ext3
with /var/lib/BackupPC on its own partition a 6 TB lvm volume made up
of 3 2 TB raid1 pairs. rsync 3.0.6

The specs for the client are:
2.93 Ghz Intel i3, 4 GB ram, filesystem ext3 with the main data
partition being a 4 disk 3 TB raid10 partition.

Have you tried doing a normal rsync or even just a scp copy of the data
from the client to the backup and seen how long that takes? Perhaps
upgrading the rsync on the client which I see you said is 2.6.3 might
help.

cheers

> 
> On 6 Nov 2012, at 09:58, Michał Sawicz wrote:
> 
> > W dniu 06.11.2012 10:43, Cassiano Surek pisze:
> >> That indeed makes sense.  On the Host Summary screen I cannot find
> >> that info (how long the backup took, e.g. (end-start) date/time.
> >> Is there a place where these get saved or should I just use my own
> >> stop watch? :)
> > 
> > For each backup, on the host page, there's a elapsed time column
> > with time in minutes it took to make the backup.
> > 
> > -- 
> > Michał (Saviq) Sawicz <michal AT sawicz DOT net>
> 
> 
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