[OpenIndiana-discuss] Real performance hit raidz2 5 disks vs 6?

[Peter Tribble]

I recommend reading

http://blog.delphix.com/matt/2014/06/06/zfs-stripe-width/


On Sat, Jul 5, 2014 at 1:38 PM, Hans J Albertsson <
hans.j.albertsson at gmail.com> wrote:

> I'm thinking of setting up a 5 x 4TB disk raidz2.
>
> Supposedly this is far from optimal, at least for write performance, but I
> cannot find any numbers or even hand waving discussion of how much worse
> the 5disk z2 will be.
>
> I will use it for media files over cifs and/or dlna, almost exclusively.
>
> Thus it'll be almost consistently write once/read many, and most files will
> be large.
>
> I will put files of the appropriate types on there, so transcoding can be
> avoided almost completely. A separate machine will handle the few cases of
> transcoding that can't be avoided.
>
> The machine is an N54L with 16GB of ECC memory.
>
> It will run either napp-it on oi or freenas.
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-- 
-Peter Tribble
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/