I read this (http://blogs.sun.com/roch/entry/when_to_and_not_to) blog regarding when and when not to use raidz. There is an example of a plain striped configuration and a mirror configuration. (See below)
M refers to a 2-way mirror and S to a simple dynamic stripe. Config Blocks Available Random FS Blocks /sec ------------ ---------------- --------- M 2 x (50) 5000 GB 20000 S 1 x (100) 10000 GB 20000 Granted, the simple striped configuration is fast, and of course with no redundancy. But I don't understand how a mirrored configuration can perform as good when you sacrifice half of your disks for redundancy. Doesn't a mirror perform as one device? Can someone please clarify the example from the above, I think I am missing something? This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
