On Thu, 20 Mar 2008, Mario Goebbels wrote: >> Similarly, read block size does not make a >> significant difference to the sequential read speed. > > Last time I did a simple bench using dd, supplying the record size as > blocksize to it instead of no blocksize parameter bumped the mirror pool > speed from 90MB/s to 130MB/s.
Indeed. However, as an interesting twist to things, in my own benchmark runs I see two behaviors. When the file size is smaller than the amount of RAM the ARC can reasonably grow to, the write block size does make a clear difference. When the file size is larger than RAM, the write block size no longer makes much difference and sometimes larger block sizes actually go slower. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
