2017-10-25 14:36:10: Blue Waters Emergency Maintenance is complete and the system was returned to service at 2:05PM, with the login nodes returned by 9AM. Though critical security patches warrant such a short notice interruption, we apologize for any inconvenience this may have caused.
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We are encountering instability on the login nodes.  The issue is causing high artifical load, and simple commands like "w" and "ps" would hang.  We will be
Update: This issue has been resolved. No changes to your code is necessary.  Please report any other issues to We have been alerted to an issue causing
Blue Waters has been returned to service at 2:27am on 3/29/2017.
Blue Waters is currently in maintenance starting at March 28th 12am until March 29th 4pm.   The full system will be unavailable during this period. 
Blue Waters is currently experiencing a meta data server (MDS) failover on the scratch file system that began at 10:15 PM CT. As a result, all I/O transactions for the scratch filesystem
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