Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?
2010-08-12 19:26:34
On 12/08/10, Mike Hanby (mhanby AT uab DOT edu) wrote:
> I'm curious whether others with the PV-124T with LTO4 are using
> hardware or software compression.
>
> I am testing a new Bacula deployment with one of these autoloaders /
> drives and haven't found a good suggestion as to which type of
> compression to go with.
My setup is a single machine with attached storage and tape drive.
I think it depends on how big your backups are and what sort of
compression you are looking for. On my fast server (8 core Xeon
E5520/2267MHz) it halves the speed of the the read off disk when using
software compression (it uses most of the CPU on one core to do the
compression).
This was a useful mailing list thread:
http://old.nabble.com/LTO:-hardware-vs.-software-compression-td15609768.html
I have hardware compression on and I get around 100MB/s throughput to
the tape device on a SAS card, and manage about 1.1TB on an LT04 tap.
I'd be interested to hear other thoughts on this.
Rory
--
Rory Campbell-Lange
rory AT campbell-lange DOT net
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- [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, Mike Hanby
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?,
Rory Campbell-Lange <=
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, Phil Stracchino
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, Mike Hanby
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, Dietz Pröpper
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, Peter Zenge
- Re: [Bacula-users] Dell PV-124T with Ultrium TD4, Hardware or Software compression?, John Drescher
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