Hi!
I am currently evaluating Bacula for our on-site backup. All is running well,
except I am stumbling over a few performance issues. Our setup is as follows:
Test-Server: Dual PIII 1GHz on a GRAU Tape Silo running Bacula Postgresql
1.36.2 spooling on a software Raid-0 2x80GB PATA Disks.
Test-Client: Dual Opteron with a 1.6TB FibreChannel-Raid, XFS-formatted.
Both are connected via Gbit Ethernet, netio shows a transfer rate of 120MB/s.
Starting a full backup, I am getting something about 30-40MB/s as expected,
but after a few minutes the rate starts to drop significantly dropping
sometimes as low as 100kB/s. From time to time, the rate rises again to
20-30MB/s, but drops again after a short while. Also, the Client-RAID becomes
quite unresponsive for other requests. The effects are the same when writing
directly to tape (which handles about 30MB/s compressed) instead of spooling.
A full backup takes about five days. Currently, we are using Networker via
NFS, doing the same backup to a slower tape in about 24-36 hours.
There are some threads in the archive mentioning a bad performance when using
postgresql, but the postmaster process is running only at about 20%.
Did somebody already stumble on such performance issues when doing a backup to
a high speed tape? Where are the bottlenecks here? Whould the performance
increase switching from postgresql to mysql? Is it possible, that Bacula just
has problems in processing small files?
Regards,
--
Andreas Kopecki High Performance Computing Center (HLRS)
Visualisation Department
Tel. ++49-711-6855789 University of Stuttgart,
Allmandring 30a, D-70550 Stuttgart
[EMAIL PROTECTED] http://www.hlrs.de/
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