From: David Turner (dpturner_at_rasta.lbl.gov)
Date: 04/02/2001
Greetings NERSC PVP User, This Thursday, April 5, the entire PVP cluster will be taken down at 16:00 PDT to expand the /tmp file system on Killeen. This note provides additional information. Currently, Killeen has about 180GB of /tmp space; Bhaskara and Seymour have about double that amount. This week's changes will bring Killeen more in line with the other two machines. It will not be possible to checkpoint running batch jobs on Killeen during the file system reconfiguration. Therefore, we are currently draining the batch queues on Killeen. Users can expect to see jobs queued in Killeen's NQS queues during this time. You will also notice higher than normal idle time on Killeen as we approach Thursday. Batch jobs on Bhaskara and Seymour should checkpoint and restart normally during Thursday's downtime. We will make every effort to preserve files left in /tmp on Killeen. However, this will require all user directories and files to be moved to other file systems (or HPSS) before the reconfiguration, and then restored after the work is complete. This can be a very time-consuming and error-prone operation. Therefore, we would like to request that all users make a sincere effort to "clean up" /tmp before Thursday. This would include moving files to $HOME or HPSS, removing files that are already saved elsewhere, compressing files that need to remain in /tmp, etc. YOUR HELP IN THIS MATTER IS GREATLY APPRECIATED! If you have any questions, please contact NERSC Consulting at: consult@nersc.gov 1-800-66-NERSC, option 3 (510) 486-8600, option 3 Best regards, David Turner User Services Group email: dpturner@nersc.gov NERSC Division phone: (510) 486-4027 Lawrence Berkeley Lab fax: (510) 486-7520
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