On 4/14/07, Andreas Dilger [EMAIL PROTECTED],
Nathaniel Rutman [EMAIL PROTECTED] wrote:
> Use "lfs setstripe 0 0 3" for directory for ost[0,1,2], "lfs
setstripe 0 3 3"
> for directory for ost[3,4,5], etc.
> You can use 'lfs setstripe' to designate a starting OST index,
for a
> file or a directory. With that, you could set up different
single-OSS
> directories.
Thanks, this helps! In this way any file will indeed be confined to exactly
one OSS
while will be able to make use the combined power of three internal OSTs.
> If you have more than a single client reading from an OSS at the
same
> time, you don't even need to do that -- use three OSTs per OSS, with
> everything single-striped. Your multiple clients can use the
different
> OSTs simultaneously, increasing your total performance.
True, but in this way the peak performance per file will be that of only one
OST,
which is only 300+ MB/sec in our case. Whereas with 3 OSTs striped we may
be able to obtain between 750 and 900+ MB/sec per file.
Thanks again for clarifying this issue - Andrei.
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