On Sep 16, 2009, at 1:09 PM, Bob Friesenhahn wrote:
On Wed, 16 Sep 2009, Thomas Burgess wrote:
hrm, i always thought raidz took longer....learn something every
day =)
And you were probably right, in spite of Richard's lack of knowledge
of a study or the feeling in his gut. Just look at the many
postings here about resilvering and you will see far more complaints
about raidz taking a long time.
Actually, I had a ton of data on resilvering which shows mirrors and
raidz equivalently bottlenecked on the media write bandwidth. However,
there are other cases which are IOPS bound (or CR bound :-) which
cover some of the postings here. I think Sommerfeld has some other
data which could be pertinent.
-- richard
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