[Lustre-discuss] read less than one stripe
valiantljk at gmail.com
Fri Jul 12 15:06:14 PDT 2013
Thank you Andreas. Then how the blocks are distributed? Are they in a
round-robin fashion, supposing there are 6 disks.
On Thu, Jul 11, 2013 at 10:06 PM, Dilger, Andreas
<andreas.dilger at intel.com>wrote:
> On 2013-07-11, at 22:20, "Jaln" <valiantljk at gmail.com> wrote:
> > If the I/O request is less than one stripe width, what will happen on
> the OST?
> > Is the lustre gonna access the whole stripe?
> The stripe size controls the amount of data written to one OST before
> moving to the next OST. It doesn't control the IO size on the OST itself.
> The minimum IO size on the OST is 4096 bytes, the blocksize of the
> underlying ldiskfs filesystem.
> Cheers, Andreas
Genius only means hard-working all one's life
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