On 5 Nov 2012, at 19:02, Cassiano Surek <cass AT surek.co DOT uk> wrote:
> Hello all,
>
> This is my first post to the list, so please be gentle. :)
>
> I have been running a backuppc server for a while, but recently it has been
> running way too slow to be useful.
>
> Bearing in mind that every situation is different, it would be beneficial to
> compare the performance of my setup with others to rule out any obvious
> bottlenecks.
>
> Please read below the specs for the server and a client, with the reported
> speed achieved with that combination.
>
> Server:
>
> Centos 5, Linux 2.6.18-53.el5 #1 SMP Mon Nov 12 02:22:48 EST 2007 i686 i686
> i386 GNU/Linux
> Quad Intel(R) Xeon(TM) CPU 3.06GHz
> 2Gb Ram
> ext3 raid 1 pool on separate disk/partition
> rsync 3.0.6
> backuppc 3.2.1 with the latest perl modules installed via perl CPAN.
>
>
> Client:
>
> Centos 4.9, Linux 2.6.9-103.ELsmp #1 SMP Fri Dec 9 04:31:51 EST 2011 i686
> i686 i386 GNU/Linux
> Dual Intel(R) Pentium(R) 4 CPU 3.20GHz
> 4Gb Ram
> ext3 raid 1
> rsync 2.6.3 (client) running via xinetd
>
> Both are connected to the same switch at the data centre using gigabit
> interfaces.
>
> This yields:
>
> Backup size: 105.58 Gb (yep, it is quite big)
> Speed: 0.29 Mb/s
>
I think the likely problems are:
Ram on the server as already pointed out.
The clients disk subsystem performance, try mounting the filesystem being
backed up with noatime.
Try changing from rsync to tar, there are trade offs but for small files tar is
faster.
Clients CPU performance, less likely but might be worth trying the arcfour
cypher on ssh.
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