cclab cluster

The cclab cluster consists of six machines, each with dual-core/dual processor Intel Woodcrest Xeon 5130 processors (that's effectively four processors per machine). These machines are shared with the Jones Group and are also used for teaching. The master node is cclab-m0. It has 16 GB RAM and two mirrored 500 GB disks. The five compute nodes are cclab-w1 through w5. They have 4 GB RAM and 80 GB disks.

Job policy

Jones Group users have priority on w1, w2, and two processors of w5; Stern group users have priority on w3, w4, and the other two processors of w5. Node m0 is to be reserved for jobs that require a large amount of RAM, and jobs run by users taking courses.

If users run a job on the master node or on a compute node for which they do not have priority, they should start their job with 'nice +19 ...' (or use 'renice +19' if the job has already started). Please note that it is OK to run a job on any node as long as there are processors available (it is not OK if there are already 4 jobs running). However, you should run with nice and be prepared to terminate your job on a node for which you don't have priority. One or two extra niced jobs will not adversely affect the performance of high-priority jobs, but any more than that will.

Disk usage on cclab
Jobs running on cclab

Automatic backups do not exist at this time, so users are responsible for backing up their own data.