Changes to this message: MPP and UV unavailable Dear users of the Linux Cluster systems at LRZ, unfortunately both the MPP cluster and the Ultraviolet systems are presently unavailable for user operation. * On the UV, a defective NUMAlink component needs replacement. * On the MPP cluster, we are observing failures in MPI message transmission which need further investigation. We'll keep you updated about the status of the above systems, and of course are working toward a speedy return to user operation. Apologies for the disruption of services. ----------------------------------------------------------------------- Recent configuration changes: * The default MPI environment on the MPP cluster will be changed from Parastation MPI to Intel MPI. However, the mpi.parastation module will remain available for legacy use until the end of 2013. On the sgi ICE and UV systems, the sgi MPI (mpi.mpt) will remain default. * The 8-way Myrinet Cluster will be retired from parallel processing, and the nodes will be added to the serial processing pool. This implies that the partition "myri_std" in the SLURM cell "myri" will become unavailable. * For the serial queues, SLURM fair share scheduling will be introduced. For the parallel queues, a combination of fair share scheduling and favoring large jobs will be activated. This is to prevent a single user from monopolizing cluster segments for long times if there are many jobs in the queue. * New storage systems will be introduced for the WORK (==PROJECT) and SCRATCH file systems. Please note that LRZ will only migrate WORK data to the new file system; data in SCRATCH will not be migrated. However the old SCRATCH file system will remain available as a separate mount in read-only mode on the login nodes until the end of March, 2013. Migration of data can then be done via commands like cd $SCRATCH_LEGACY cp -a my_scratch_subdirectory $SCRATCH The environment variable $SCRATCH_LEGACY will remain defined and point to the legacy scratch area until end of March, 2013. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4501/ Reinhold Bader