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| News |
| Hardware |
| OLCF Cray XT5 Upgraded |
| The Oak Ridge Leadership Computing Facility’s (OLCF) Cray XT, Jaguar, has undergone an upgrade that will increase the peak performance of the machine from approximately 1.6 petaflop/s to over 2 petaflop/s. The process of upgrading the machine was scheduled to occur in fives phases over the course of 14 weeks. |
| Cray’s XT Jaguar is composed of the Jaguar XT5 and XT4 partitions. Each of the XT5 partitions’ 18,688 compute nodes currently contains two quad-core AMD Opteron (Barcelona) processors, resulting in over 149,000 processing cores. Funded with Recovery Act money from the DOE, the upgrade involves replacing each of the XT5 partitions’ quad-core processors with six-core AMD Opteron processors, code-named Istanbul. The result will bring Jaguar XT5’s total number of processors to over 224,000. |
The upgrade was planned to proceed on a rolling basis, thus keeping large portions of the machine available for user access during most of the upgrade process. The XT4 partition was planned be available throughout the XT5 upgrade. The XT5’s new processors will be tested thoroughly to ensure reliable and improved performance.
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