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


> 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 believe the above is horrifically slow, but would welcome your wise
> input.
>
> Should I need to give you more info about machines or connectivity to
> paint a clearer picture, please tell me which data is required.
>
> Many thanks,
>
> Cass Surek

On a full, it looks like my systems generally get around 6Mb/s, and closer
to 1Mb/s on an incremental -- comparing the files may not take a lot of
bandwidth, but it does take resources on both sides, so what you're seeing
may be normal for an incremental, I don't know.

My backup server is a Q6600 (4x2.4Ghz) system running Linux kernel 3.5.7,
and the file system is xfs on RAID6.

On the client side, I selected a client to look at at random, it happens
to be running FreeBSD 9.1 and the filesystem is ufs.

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