Raid-Z config
Added by Tom Vaughan about 1 year ago
Can someone please put this in newbie terms:
For parity (RAID-Z, RAID-Z2) configurations:
Random I/O reads and writes scale linearly with the number of RAID sets.
Sequential I/O throughput scales linearly with the number of data (non-parity) disk
If I have 8 500 gig drives what would be the best setup for raidz1
Replies
RE: Raid-Z config - Added by Linda Kateley about 1 year ago
so in zfs you can create pools of raid sets.
for example i can create a pool out of 2 raid sets.. It
Volume Data
raidz1 set 1
disk1 disk2 disk3
raidz1 set 2
disk4 disk5 disk6
It will then stripe across both raid sets.
RE: Raid-Z config - Added by Tom Vaughan about 1 year ago
Thanks for the response Linda!
Do raid sets have to have the same number of disks?
If I had 10 disks for raidz: 3 total raid sets 2 sets with 3 disks (6 disks total) 1 set with 4 disks (4 disks total)
Would this work ok or is there a better config?
Do all drives have to be the same size or just the ones in a raid set?
Thanks, Tom
RE: Raid-Z config - Added by Linda Kateley about 1 year ago
No not at all..
i can have one raid set be 10 disk and another be 3. It will stripe across them.
for every raid set in a pool you will have 1 parity so for space you will be giving up alot. Maybe 2 sets of 5?
the drives don't have to be the same size, but when you get to the end of the smaller disk perf will go down.