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Re: stride



ok, in a way its like a stripe? I though when you do a stripe you put the metadata on number of disks too. How is that different? Is there a diagram I can refer to?


TIA



On Thu, Jun 19, 2008 at 1:47 AM, Andreas Dilger <adilger sun com> wrote:
On Jun 18, 2008  20:14 -0400, Mag Gam wrote:
> If I am using a Hardware RAID (3ware) with 6 disks and I decide to go with
> RAID 5 with stripe of 128KB (default on my controller) and no spare.
> By reading documentation I should do 128/4 as my stride size when creating
> the file system. I am not understanding how this number works and what
> exactly stride does. Can someone care to explain this to me?

The "stride" option changes the location of some of the filesystem metadata
so that it isn't all located on the same disk.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.



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