> I may have RAIDZ reading wrong here. Perhaps someone > could clarify. > > For a read-only workload, does each RAIDZ drive act > like a stripe, similar to RAID5/6? Do they have > independant queues? > > It would seem that there is no escaping > read/modify/write operations for sub-block writes, > forcing the RAIDZ group to act like a single stripe.
Can RAIDZ even do a partial block read? Perhaps it needs to read the full block (from all drives) in order to verify the checksum. If so, then RAIDZ groups would always act like one stripe, unlike RAID5/6. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
