Re: [Bacula-users] Bacula and 16 bay JBOD

On 03/16/11 13:08, Mike Hobbs wrote:
>   Hello,  I'm currently testing bacula v5.0.3 and so far so good.  One 
> of my issues though, I have a 16 bay Promise Technologies VessJBOD.  How 
> do I get bacula to use all the disks for writing volumes to?
> 
> I guess the way I envision it working would be, 50gb volumes would be 
> used and when disk1 fills up, bacula switches over to disk2 and starts 
> writing out volumes until that disk is filled, then on to disk3, etc.. 
> eventually coming back around and recycling the volumes on disk 1.
> 
> I'm not sure the above scenario is the best way to go about this, I've 
> read that some people create a "pool" for each drive.  What is the most 
> common practice when setting up a JBOD unit with bacula?  Any 
> suggestions or advice would be appropriated.

That scheme sounds like a bad and overly complex idea, honestly.
Depending on your data load, I'd use software RAID to make them into a
single RAID5 or RAID10 volume.  RAID10 would be faster and, if set up
correctly[1], more redundant; RAID5 is more space-efficient, but slower.


[1] There's a right and a wrong way to set up RAID10.  The wrong way is
to set up two five-disk stripes, then mirror them; lose one disk from
each stripe, and you're dead in the water.  The right way is to set up
five mirrored pairs, then stripe the pairs; this will survive multiple
disk failures as long as you don't lose both disks of any single pair.


-- 
  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
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  Renaissance Man, Unix ronin, Perl hacker, SQL wrangler, Free Stater
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