Important Information for SHC Users
As of Sept 8, 2009, SHC has been transitioned to the new sw stack (RHEL+OpenIB). There are currently 115 core4 nodes and 65 core8 nodes, in production. For more information, please visit the SHC Getting Started / System Guide.
Important Information for SHC Users
Over the next couple of days, more backend nodes from shc-a will be transitioned to shc-[c,new]’s cluster of backend nodes, running the new software stack. By Sept 4, there will be just 24 shc-a backend nodes, all the rest of the compute nodes will be running the new software stack, seen from shc-[new,c].
Preventive Maintenance on Sept 8 from 0800 to 1400 will encompass testing the complete transition of SHC compute and head node resources to the upgraded software stack environment. The fully upgraded production SHC cluster configuration will be two head nodes (shc-[a,b]) and 1180 Opteron compute node cores (163 dual cpu/dual core + 66 dual cpu/quad core).
Questions or concerns about the upgrade? Just let us know.
Thanks to SHC users for your patience during Preventive Maintenance on the InfiniBand chassis and associated infrastructure. Any questions, comments, or concerns should be addressed to:
CACR’s Shared Heterogeneous Cluster (SHC) will take extended Preventive Maintenance in the near future to address issues with the InfiniBand switch – the fast interconnect fabric for the cluster.
Downtime is scheduled for Monday, June 29, 8AM through Tuesday, June 30, 12 noon to deploy a new switch chassis. After this major hardware upgrade/repair, the cluster will be much more serviceable and will be operating with optimal communications.
SHC user questions or concerns are welcome, please contact:
