On Fri, Jun 11, 2010 at 1:54 AM, Richard Elling <richard.ell...@gmail.com>wrote:
> On Jun 10, 2010, at 1:24 PM, Arne Jansen wrote: > > > Andrey Kuzmin wrote: > >> Well, I'm more accustomed to "sequential vs. random", but YMMW. > >> As to 67000 512 byte writes (this sounds suspiciously close to 32Mb > fitting into cache), did you have write-back enabled? > > > > It's a sustained number, so it shouldn't matter. > > That is only 34 MB/sec. The disk can do better for sequential writes. > > Note: in ZFS, such writes will be coalesced into 128KB chunks. > So this is just 256 IOPS in the controller, not 64K. Regards, Andrey > -- richard > > -- > ZFS and NexentaStor training, Rotterdam, July 13-15, 2010 > http://nexenta-rotterdam.eventbrite.com/ > > > > > > >
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