On 04/28/10 03:17 AM, Roy Sigurd Karlsbakk wrote:
Hi all
I have a test system with snv134 and 8x2TB drives in RAIDz2 and currently no
Zil or L2ARC. I noticed the I/O speed to NFS shares on the testpool drops to
something hardly usable while scrubbing the pool.
Is that small random or block I/O?
I've found latency to be the killer rather than throughput, at lest when
receiving snapshots. In normal operation, receiving an empty snapshot
is a sub-second operation. While resilvering, at can take up to 30
seconds. The write speed on bigger snapshots is still acceptable.
--
Ian.
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