[OmniOS-discuss] Slow NFS writes in 151026

[Bob Friesenhahn]

On Thu, 23 Aug 2018, Doug Hughes wrote:

> NFS writes (especially for lots of small files) to omniOS *really* benefit 
> from having ZIL on those SSD.
>
> You could remove the cache from the pool, carve of an 8GB chunk for ZIL on 
> each and the rest for L2arc if you want that.
>
> then add a mirrored zil using the 8GB chunks and the other partition for 
> l2arc
>
> An SSD zil helps with metadata update absorption and small files writes that 
> are synchronous over NFS. A lot. (that's my experience)

It looks like that is what he did but it looks like an error was made 
in that a spinning disk may have been added as a log drive 
(c0t55CD2E414EC0FF43d0s0) rather than an SSD as was intended.

Bob
-- 
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/