[zfs-discuss] I/O Perf of RAID0 vs RAID10

Lindsay Mathieson lindsay.mathieson at gmail.com
Wed Apr 20 21:26:23 EDT 2016


On 21 April 2016 at 10:04, Richard Laager <rlaager at wiktel.com> wrote:
> So we're comparing these?
> 1) zpool create tank mirror A B mirror C D
> 2) zpool create tank A B C D
>
> 1 has half the capacity of 2.
>
> 1 can survive any single disk failure, and two disk failures if they happen
> to be from different mirror groups. 2 can survive no failures.
>
> They have the same read IOPS: four times a single disk.
>
> 1 has the write IOPS of two disks. 2 has the write IOPS of 4 disks.



Sorry, I should have been clearer. For reference, all disk are 3TB WD
Red's. I was comapring:

1) zpool create tank mirror A B mirror C D
2) zpool create tank A B

So 4 disks in Raid10 or 2 disks in Raid0. From what you were saying,
2) will have half the  Read IOPS of 1)

Thanks,

-- 
Lindsay


More information about the zfs-discuss mailing list