Author: Roy Sigurd Karlsbakk <roy AT karlsbakk DOT net>
Date: Thu, 7 Oct 2010 19:47:57 +0200 (CEST)
Hi all I'm planning a Bacula setup with ZFS on the SDs (media being disk, not tape), and I just wonder - should I use a smaller recordsize (aka largest block size) than the default setting of 128kB?
Author: Bruno Friedmann <bruno AT ioda-net DOT ch>
Date: Thu, 07 Oct 2010 20:11:27 +0200
If the data coming from bacula are already compressed by the bacula-fd there's little space for improvement. In your type of setup, I would disable compression on bacula-fd increasing the speed of ba
Author: Roy Sigurd Karlsbakk <roy AT karlsbakk DOT net>
Date: Thu, 7 Oct 2010 20:33:00 +0200 (CEST)
thing is, I can't find anything about compression being enabled... perhaps the test set I ran first contains somehow hard-compressable data... Vennlige hilsener / Best regards roy -- Roy Sigurd Karl
Author: Mingus Dew <shon.stephens AT gmail DOT com>
Date: Thu, 7 Oct 2010 14:39:26 -0400
If the data coming from bacula are already compressed by the bacula-fd there's little space for improvement. In your type of setup, I would disable compression on bacula-fd increasing the speed of b
Author: John Drescher <drescherjm AT gmail DOT com>
Date: Thu, 7 Oct 2010 14:40:47 -0400
On Thu, Oct 7, 2010 at 2:33 PM, Roy Sigurd Karlsbakk <roy AT karlsbakk DOT net> wrote: You enable that in the fileset. What does your fileset definition look like? John -- Beautiful is writing same m
Author: Henrik Johansen <henrik AT scannet DOT dk>
Date: Thu, 7 Oct 2010 22:17:20 +0200
Setting the recordsize to 64k has worked well for us so far. If you are limited on CPU power you might consider to disable the SD's checksum feature since ZFS already does that. I have played with ZF
Author: Phil Stracchino <alaric AT metrocast DOT net>
Date: Thu, 07 Oct 2010 16:37:21 -0400
That said, my own disk SD runs on ZFS with default block size and works just fine. -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 alaric AT caerllewys DOT net alaric AT metrocast DOT
Author: "James Harper" <james.harper AT bendigoit.com DOT au>
Date: Fri, 8 Oct 2010 09:01:16 +1100
Bacula that file It can _not_ lead to data errors, otherwise you'd never be able to back up compressed or encrypted files. If some types of data cause corruption in your compression/encryption strea
Author: Henrik Johansen <henrik AT scannet DOT dk>
Date: Sat, 9 Oct 2010 13:31:30 +0200
As a general rule I do agree (especially when dealing with sequential I/O) - but it still is dependend on the application I/O. $ for f in `ls`; do zfs get -Hpo value recordsize storage01-01/bacula/$f
Author: Phil Stracchino <alaric AT metrocast DOT net>
Date: Sat, 09 Oct 2010 11:40:04 -0400
Please do. This is interesting information. -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 alaric AT caerllewys DOT net alaric AT metrocast DOT net phil AT co.ordinate DOT org Renaiss
Author: Henrik Johansen <henrik AT scannet DOT dk>
Date: Sat, 9 Oct 2010 21:33:17 +0200
Seems I was fooled by the quantize function - the raw size is 64512 bytes. According to the Bacula manual this also is the default maximum block size for the SD ;-) I'll bump that to 131072 bytes whe