ZFS obn FreeBSD hardware model for 48 or 96 sata3 paths...

[Bob Friesenhahn]

On Mon, 19 Sep 2011, Freddie Cash wrote:
> 
> L2ARC has extreme bandwidth limitations as compared with RAM.  Be careful what you wish for.
> 
> For writes (7 MBps, I believe); there shouldn't be any limits on the reads. 

If (for example) an SSD is used with a 200MB/s read rate for the 
L2ARC, then the L2ARC is limited to 200MB/s (as compared with perhaps 
10GB/s or 20GB/s for RAM).

The L2ARC is really all about eliminating the access latency of 
rotating-rust but any device will provide far less bandwidth than 
system RAM.

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