Bacula-users

Re: [Bacula-users] LTO-4 Drive issues

2010-05-22 16:27:44
Subject: Re: [Bacula-users] LTO-4 Drive issues
From: Richard Scobie <richard AT sauce.co DOT nz>
To: bacula-users AT lists.sourceforge DOT net
Date: Sun, 23 May 2010 08:21:50 +1200
skipunk wrote:
> Status update.  I just finished the first backup job which was 3.6 Gb.  It 
> took 2.5 hours to run. avg speeds finished around 500k/s.
> 
> I've gone as far again to reboot the library and the server and still no 
> changes.  I'm not sure what i'm over looking. I have 1T of data to backup on 
> one of the servers and at this rate it will take far too long to complete. 
> Really pointless to even attempt.
> 

This throughput is so low that there almost must be some hardware issue. 
Is your tape drive sharing the same SAS controller as other storage?

In order to take full advantage of LTO4 speed, spooling of all data to a 
fast drive array is mandatory - backing up highly compressible data 
using on drive compression, the RAID array I use for spooling is feeding 
  the drive at around 180MB/s.

Regards,

Richard

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