Hello,
Romain wrote:
Spooling is when you copy data from the client(s) to a scratch disk area
on your Bacula server, then copy from there to your storage device.
It's primary purposes are:
(1) to allow client backups to finish quickly if the backup rate is
limited by a relatively slow tape or other slow storage device;
The problem is that my backup is made directly to disk.
I believe that data spooling won't increase the average bitrate.
I save many little files from all servers. It seems to be the bottleneck.
So I tried to remove GZIP compression but it doesn't change anything.
The problem comes from recording data on the mysql database.
If you alreayd know that you can start working on the problem.
The mysql database is stored on the backup server but on a different disk (in
reality 2 Raid-1 disks on an independant SCSI controller).
You can try to do some tuning to mysql. For example, turning off some of
the indexes should increase the performance, but makes restore slower.
You could turn them off before backup and on after the backups are done,
though.
You could move the database to another server.
Or you could investigate further - for example, I have the database on a
server separate from the backup server. It's an old Athlon 500, with 512
MB memory and cheap IDE disks. No RAID, no special tuning, and the
database is fast enough even for my mail backups where I move almost
50.000 files. After writing to tape, despooling the attributes takes
about 6 minutes - not bad considering the database server.
I have no more idea and my worst backup takes 1:45 hour for only 4,5Gb data.
Furthermore some backups don't want to run concurrently and some other do so....
This should be a problem with your setup.
You will have to find the differences in the setup of the jobs that
don't run in parallel, look through your configuration files, and
closely observe baculas work to solve this. Preferrably in this order :-)
Arno
Bacula works fine but there really is a performance problem for me.
All more ideas are very welcome !!
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IT-Service Lehmann [EMAIL PROTECTED]
Arno Lehmann http://www.its-lehmann.de
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September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
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