---------- Forwarded message ----------
From: David Turner <dpturner@lbl.gov>
Date: Thu, Jun 16, 2011 at 3:21 PM
Subject: [mpp-users] New extra-large-memory resource available
To: mpp-users@nersc.gov

Dear NERSC User,

NERSC has recently installed and tested a unique resource
for users who require more memory than is currently provided
by our other computational systems. We have deployed a single
node in the Carver/Magellan complex with the following
characteristics:

* 4 8-core Intel Xeon X7550 (Nehalem EX) 2.0GHz processors
* 1TB DDR3 memory
* Same software environment as Carver login nodes

Access to this 32-core node is via the "mag_xlmem" batch queue on
Carver. Note that this queue allows batch jobs to share the node,
rather than have exclusive access. Jobs must have the following
characteristics to use this queue:

* No more than 8 cores (ppn=8)
* Memory size *must* be specified; no less than 4GB per core,
and no more than 800GB per job
* No more than 48 hours walltime

Users are limited to 2 jobs running in this queue.

The above limits will probably be adjusted depending on user
feedback.

For more information on submitting jobs to this new resource,
please see:

https://www.nersc.gov/users/computational-systems/carver/running-jobs/memory-considerations/

Carver batch queue limits and policies are documented here:

https://www.nersc.gov/users/computational-systems/carver/running-jobs/queues-and-policies/

--
Best regards,

David Turner
User Services Group email: dpturner@lbl.gov
NERSC Division phone: (510) 486-4027
Lawrence Berkeley Lab fax: (510) 486-4316
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