Bacula-users

Re: [Bacula-users] Very low performance with compression and encryption !

2011-01-20 10:03:34
Subject: Re: [Bacula-users] Very low performance with compression and encryption !
From: John Drescher <drescherjm AT gmail DOT com>
To: Hugo Letemplier <hugo.let.35 AT gmail DOT com>, bacula-users <Bacula-users AT lists.sourceforge DOT net>
Date: Thu, 20 Jan 2011 10:00:50 -0500
> I am running bacula 5.0.3 on CentOS 5.6.
>
> When I run a simple Job I can have rates between 20 or 40 MB/s over a
> Gigabyte network but when I am running this job with client encryption
> and compression everything become slow below 5 MB/s and sometimes
> under 500 KB/s.
> Generally I test with a backup job on a full system and then do Inc.
> Both are very slow.
> What should I check ?
> Maybe it's my file set ?
> I used both MacOSX client and CentOS clients with equivalent slowness.
> Does anybody got this problem ?
> Maybe it can come from zlib or openssl that I use ?
> I am practically sure it's coming from the File Daemon.
> I use compression at 3/10 level
>

This is normal. If you want fast compression do not use software
compression and use a tape drive with HW compression like LTO drives.

John

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