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Available Hardware Resources

by Gustaaf Van Moorsel last modified Dec 07, 2017 by K Scott Rowe

NMASC has a post processing environment comprised of a processing cluster to support CASA execution and a data storage cluster for support of the Lustre filesystem.  Resource allocations of NRAO facilities are limited by available nodes (servers) in the processing cluster and total space within the storage cluster.

Processing Cluster

The NMASC has a 60 node compute cluster.  Each node has dual 2.6GHz, 8-core Intel E5-2670 Sandy Bridge processors.  Memory ranges from 192GB to 256GB..  The compute nodes have no local disk storage, instead they are connected to a distributed parallel filesystem (Lustre) via a 40Gbit Infiniband network.  The compute cluster supports automatic EVLA pipeline processing, archive retrievals, batch processing requests and interactive processing sessions.

Lustre Filesystem

Lustre is a distributed parallel filesystem commonly used in HPC environments.  Each cluster node sees the same shared filesystem.  The NMASC Lustre filesystem is made up of 8 storage servers each with four RAID arrays (32 total arrays) which are 44TB in size.  The total storage volume is currently 1.4PB.  Individual nodes can read and write to the Lustre filesystem in excess of 1GByte/sec.  The entire filesystem can sustain roughly 15GByte/sec aggregate I/O.

The Lustre filesystem appears as /lustre/aoc on all Lustre enabled client computers.  As of March 2016, there are 200 such computers.

Public Workstations

The NMASC has 9 workstations for local visitors.  The systems vary in processor, memory and storage since work is expected to be done mostly on the compute cluster, but all have 10Gbit connections to the Lustre filesystem.  Instructions for reserving workstations can be found in the Computing section of the Visiting the DSOC web page.