note for usage

From: Boris Fain <no email>
Date: Mon, 6 Dec 2010 16:36:11 -0800

This may be useful to everyone. When launching a cluster on Amazon, if you
have a lot of processes writing to a shared EBS volume
NFS does become a bottleneck. Everyone's output is different, so everyone
will have to figure out their own limits. In our case we had to
limit the head node compute load to 2/8 - it simply could not handle more.
We have 12 8-core (xlarge high-cpu) instances, and there's quite
a bit of writing from each MPI thread.

-- 
b.

Received on Mon Dec 06 2010 - 19:36:16 EST