On Wednesday 20 September 2006 10:15, Uwe Schuerkamp wrote:
> hi folks,
>
> I am having an issue with automatic volume recycling, esp. with the
> time it takes to prune the oldest volume to allow it to be recycled.
>
> Our setup:
>
> - bacula 1.38.9 und Debian Linux (compiled from Source)
>
> - MySQL 5.0.20
>
> - Database size: 10G (Total clients: 27, Total bytes stored: 6.89 TB
> Total files: 3146301, according to bacula-web)
>
> - HP Ultrium 3 tape library with 8 tapes, each tape holds about 450GB
>
> - Server RAM: 2 GB, CPU: 1 GHz PIII, used exclusively for Bacula
>
> Problem: When bacula prunes the oldest volume, it takes several hours
> and apparently never finishes (I have not tested this because the
> server is already in production, and we cannot afford to have Bacula
> sit there for half a day doing nothing but pruning while all backups
> are on hold ;-).
>
> For instance, this morning Bacula started its backups at 00:35 and at
> 7:19, it decided it needs a new volume, to it decides to prune the
> oldest volume. Over two hours later, it still sits there issueing
> "pruning oldest volume" messages to the console every couple of
> minutes, while server load is below 1 (0.32-0.5 according to top), and
> apparently not getting anywhere.
>
> Once I decide to purge the volume using the bconsole "purge" command,
> it finishes in less than five minutes and the volume is marked as
> "append" in bacula-web; however the backup job that's waiting for an
> appendable volume never resumes.
>
> Database performance is apparently fine as we regulary get 10MB/sec
> write backup performance over the net and over 20MB/sec when backing
> up to tape directly from disk.
>
> Question: How long should bacula take to prune a volume successfully
> from the catalog and recycle it? If I've missed any crucial info
> please let me know.
>
> Here's the pool definition:
>
> Pool {
> Name = Default
> Maximum Volumes = 7
> Recycle Oldest Volume = yes
> Pool Type = Backup
> Recycle = yes
> AutoPrune = yes
> Volume Retention = 6 months
> Accept Any Volume = yes
> }
>
> Volume Retention is set to 6 months as we like to archive tapes offsite
> every once in a while, but I wonder wether this is really necessary (I
> was hoping not to have to use "bscan" should we need to restore files
> from some archived volume).
>
> As it stands, Bacula backup is a manual process for now as one has to
> be constantly on the watch to see wether there are still appendable
> volumes available or wether one has to purge a volume manually. I'm
> temped to try the obsolete "purge oldest volume" thingy, but the docs
> tell me this is not a good idea ;-)
>
> Again, if there's any information mission please let me know and I'll
> be happy to provide what I can.
>
> All the best & thanks much in advance for your help,
For your performance problems:
Please read the Catalog Maintenance chapter of the manual:
http://www.bacula.org/dev-manual/Catalog_Maintenance.html
In particular the Performance section in that chapter. It tells you how to
resolve these kinds of problems.
>
> Uwe
>
>
>
>
>
> --
> Uwe Schuerkamp, NIONEX GmbH (http://www.nionex.com/)
> [EMAIL PROTECTED] Tel: +49 (0)5241 / 80 10 66 FAX: / 806 23 38
> Avenwedder Str. 55, D-33311 Guetersloh, Germany
> GnuPG KeyID: 5887047D, Fingerprint: 2E1320229A3F63 7F676FE9B1A836A461
>
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