On Thu, Oct 12, 2006 at 08:52:34AM -0500, Al Hopper wrote: > On Thu, 12 Oct 2006, Brian Hechinger wrote: > > > Ok, previous threads have lead me to believe that I want to make raidz > > vdevs [0] either 3, 5 or 9 disks in size [1]. Let's say I have 8 disks. > > Do I want to create a zfs pool with a 5-disk vdev and a 3-disk vdev? > > Personally I think that 5 disks for raidz is the "sweet spot". With the > remaining 3 disks, consider a 3-way mirror if redundancy is more important > than space. This will give you two pools with different operational > characteristics.
I'll take space over redundancy in this case. :) > > Are there performance issues with mixing differently sized raidz vdevs > > in a pool? If there *is* a performance hit to mix like that, would it > > Can you tell us what size your disks are? They will be 400GB or 500GB disks. > > be greater or lesser than building an 8-disk vdev? > > In this situation a little experimenting will probably answer all your > questions. ZFS is so quick at, well, at everything, that its fun and > productive to experiment with different disk configurations. As soon as I get the disks in, I will certainly have to give them a run for their money. ;) > > [1] - For RAID-Z. How does RAID-Z2 effect this? > > For raidz2, the corresponding #s would be 4,6 and 10 (not recommended) That's what I guessed, but wanted to make sure. Thanks!!! -brian _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
