Cluster Maintenance: Tues June 6, 2017

Dear Users,

We will have our scheduled quarterly cluster maintenance on Tuesday June 6 from 8AM to 5PM. We will be upgrading the software for the Omni-Path switches and adding SSDs to the ZFS servers to improve performance. This means an outage for

1. the Omni-Path MPI cluster. On, this is specified with the --cluster=mpi and --partition=opa directives in your SLURM script. If you are not using this in your job submission script, then this outage will not impact you.

2. the ZFS storage server. This server is mounted as /zfs1. If you have not used /zfs1, then this outage will not impact you.

While there also will be maintenance to the redundant power generators at the NOC, it is not expected to affect cluster operations.