From: David Turner (dpturner_at_lbl_dot_gov)
Date: 05/23/2007
Greetings NERSC User, There will an outage next week that will affect all NERSC compute systems. This note provides a general overview of the outage; subsequent messages will provide additional details. On Wednesday, May 30, at 10:00 AM PDT, the NERSC Global Filesystem (NGF) will be taken down for a 3-hour maintenance. NGF provides project directories (/project/projectdirs) to all the compute platforms. In order to take NGF down "cleanly", we will first need to drain the compute systems of all running batch jobs. Any interactive processes that are accessing NGF will then be terminated. After removing NGF from the compute platforms, we will allow each system to resume scheduling batch jobs that do not require NGF. Identifying which jobs can safely be started during the NGF outage will probably require some action on the part of the users. We are still investigating the best way to accomplish this, and we will notify NERSC users of the procedure well in advance of the outage. -- Best regards, David Turner User Services Group email: dpturner_at_lbl_dot_gov NERSC Division phone: (510) 486-4027 Lawrence Berkeley Lab fax: (510) 486-4316
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