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

Bob Friesenhahn bfriesen at simple.dallas.tx.us
Mon Sep 19 19:06:03 UTC 2011

On Mon, 19 Sep 2011, Jason Usher wrote:
> Hmmm... I understand this, but is there not any data that might 
> transfer from multiple magnetic disks, simultaneously, at 6GB, that 
> could periodically max out the card bandwidth ?  As in, all drives 
> in a 12 drive array perform an operation on their built-in cache 
> simultaneously ?

The best way to deal with this is by careful zfs pool design so that 
disks that can be expected to perform related operations (e.g. in same 
vdev) are carefully split across interface cards and I/O channels. 
This also helps with reliability.

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

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