On Tue, Feb 16, 2010 at 11:47 AM, Peter C. Lai <pe...@simons-rock.edu>wrote:
> Which one might be "better" on pool that will consist of 6 disks: > > 6x raidz2 > or > 2 stripes of 3 disks in raidz? > > It should provide slightly less reliability (still allows for 2 disks to be > off the array at a time) but the latter should improve reads since a given > read only has to touch 3 spindles at a time instead of 5? > Depends. Do you want better reliability/redundancy (raidz2) or more throughput/IOPS (2x raidz1)? The max IOPS of a raidz vdev will be that of 1 disk. Thus, to get better IOPS, you have to have multiple raidz vdevs. The overly-simplistic way to look at is to think of the entire raidz vdev as a "single disk". Then it's an easy comparison: 1 disk is slower than 2 disks striped together. -- Freddie Cash fjwc...@gmail.com _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"