On Wed, 16 Dec 2009, Brandon High wrote:
I've set dedup=verify at the top level filesystem, which is inherited
by everything.
I started the send this morning, and as of now it's only send 590gb of
a 867gb filesystem. According to "zpool iostat 60", it's writing at
about 12-13mb/sec. Reads tend to be bursty, which indicates that the
bottleneck is in writing.
Someone else here complained just a day or two ago about a similar
problem but with an update to the sending system and not to the
receiving system. In his case 'zfs send' to /dev/null was still quite
fast and the network was also quite fast (when tested with benchmark
software). The implication is that ssh network transfer performace
may have dropped with the update.
It is wise to rule out other factors before blaming zfs.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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