Re: mdadm Raid1 Striped Reads

2008-03-23 Thread Andy Smith 
Hi,

On Wed, Mar 12, 2008 at 05:16:31PM -0400, Douglas A. Tutty wrote:
 On Wed, Mar 12, 2008 at 01:24:53PM -0500, Sam Leon wrote:
  Is there anyway to get mdadm to stripe disk reads in raid1?  Some of the 
  documentation I read makes me think that it does this by default but in 
  my tests it is not
 
 I'd like to know too.  It doesn't on my Etch box.

I believe that a single process's reads always come from one of the
disks.  You can have multiple readers using multiple disks, so it
still provides a benefit.

You could try using RAID-10 on 2 disks (this will work for Linux
md's implementation) to see if that will stripe it for even one
process's reads.

Cheers,
Andy

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mdadm Raid1 Striped Reads

2008-03-12 Thread Sam Leon 
Is there anyway to get mdadm to stripe disk reads in raid1?  Some of the 
documentation I read makes me think that it does this by default but in 
my tests it is not


Thanks,
Sam


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Re: mdadm Raid1 Striped Reads

2008-03-12 Thread Douglas A. Tutty 
On Wed, Mar 12, 2008 at 01:24:53PM -0500, Sam Leon wrote:
 Is there anyway to get mdadm to stripe disk reads in raid1?  Some of the 
 documentation I read makes me think that it does this by default but in 
 my tests it is not

I'd like to know too.  It doesn't on my Etch box.

Doug.


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