qihua wu wrote: > After I changed the recordsize to 8k, seems the read/write size is not > always 8k when using zpool iostat to check. So ZFS doesn't obey the > recordsize strictly?
Writes can be coalesced -- it is more efficient to issue larger iops. Similarly, reads can be prefetched. In other words, there may not be a 1:1 relationship between the recordsize and the size of physical iops. The smaller recordsize is important for increasing efficiency when doing lots of random reads for fixed-blocksize workloads. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
