8. Submit Nodes: storage and dominion1

8.1. Network Topology

To access the Bohrg or Dominion Cluster users should login to the appropriate head or submit node, storage for Bohrg and dominion1 for Dominion, via the appropriate gateway machine.

8.2. Home Directories

On login to both storage and dominion1 users will find themselves in their home-directory mounted from the SCSI array attached to storage as

    /home/bohrg/<username>
(/home/dominion/<username> is not used on Dominion). This home-directory is shared across the two clusters, i.e., users' will see the same files on both machines.

8.3. Scratch Space

On login to both storage and dominion1 users will be able to access their scratch space mounted from the SCSI array attached to storage as

    /scratch/bohrg/<username>
(/scratch/dominion/<username> is not used on Dominion). This scratch space is shared across the two machines.

8.4. Submitting and Monitoring Jobs: SGE

Users must never run jobs on storage or dominion1; all jobs should be submitted to the Sun Grid Engine batch/queueing system. SGE can also be used to monitor the progress of jobs.

8.5. Access to the Outside World

For information on access from the Bohrg and Dominion clusters to the outside world, especially copying files, see the FAQ.

8.6. Access to Compute Nodes

There is usually no reason for users to access the compute nodes on either cluster (except via the SGE). (When code and scripts are being developed, such access can be justified.)

At the time of writing (2005 April 18) users can login to the compute nodes on the Bohrg cluster, but cannot login to the compute nodes on the Dominion cluster. In the near future user access to the compute nodes on Bohrg will be blocked.

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