[Gluster-devel] glusterfs stripe

[Raghavendra G]

Hi John,

Please find the inlined comments.

On Thu, Jul 17, 2008 at 2:53 AM, John Marshall <John.Marshall at ec.gc.ca>
wrote:

> Hi,
>
> I was testing out the glusterfs "type cluster/stripe" and saw in the
> output:
> -----
> 2008-07-16 22:48:12 D [fuse-bridge.c:1604:fuse_writev_cbk] glusterfs-fuse:
> 169275: WRITE => 131072/131072,21474185188/21474316260
> 2008-07-16 22:48:12 D [fuse-bridge.c:1641:fuse_write] glusterfs-fuse:
> 169276: WRITE (0x80560b0, size=131072, offset=21474316260)
> -----
> Whether the client is configured with "option block-size *:4MB" or
> "option block-size *:1MB" does not seem to change what appears
> above to be write() operations of 128KB at a time. Am I understanding
> this correctly?


"option block-size " is specific to cluster/stripe xlator. It determines the
size of the chunks the file has to be sliced into and distributed among
stripe's children. It does not affect the sizes in which fuse does
writes/reads.


>
>
>
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-- 
Raghavendra G

A centipede was happy quite, until a toad in fun,
Said, "Prey, which leg comes after which?",
This raised his doubts to such a pitch,
He fell flat into the ditch,
Not knowing how to run.
-Anonymous