On Jul 30, 2010, at 11:35 AM, Andrew Gabriel wrote:

> Just wondering if anyone has experimented with working out the best zvol 
> recordsize for a zvol which is backing a zpool over iSCSI?


This is an interesting question.  Today, most ZFS implementations are done
directly on devices with an effective, fixed recordsize of 512 bytes.  But that
isn't very efficient and things like raidz don't quite work like you might 
expect.
Next up is 4KB sectors, which is a better starting point, IMHO.

That said, ultimately it is the size of the data to be written that dictates the
best answer.

-- 
Richard Elling
rich...@nexenta.com   +1-760-896-4422
Enterprise class storage for everyone
www.nexenta.com



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