Hi All. ZFS document says ZFS schedules it's I/O in such way that it manages to saturate a single disk bandwidth using enough concurrent 128K I/O. The no of concurrent I/O is decided by vq_max_pending.The default value for vq_max_pending is 35.
We have created 4-disk raid-z group inside ZFS pool on Thumper.ZFS record size is set to 128k.When we read/write a 128K record ,it issue a 128K/3 I/O to each of the 3 data disks in the 4-disk raid-z group. We need to saturate all three data disk bandwidth in the Raidz group.Is it required to set vq_max_pending value to 35*3=135 ? Thanks Manoj Nayak _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
