Dear Discovery Cluster Users:
MGHPCC will be conducting an electrical tie in of UPS power that will affect all our redundant pods.
The work will start Thursday June 23rd, 2016 06:30 AM and end Friday June 24th, 2016 17:00 PM US/Eastern
Since we cannot operate our redundantly powered storage servers, JBODS, and administration servers under load with one power supply for extended period of times, login to the cluster will not be permitted and queues will be closed. Failure under this condition can result in catastrophic damage to disks in our storage systems, corruption of our file systems, and reboot or corruption of important redundantly powered servers that control and monitor our schedulers, storage, hardware and network.
All Discovery Cluster queues will be closed on Wednesday June 22nd, 2016, 06:30 AM and all users will be logged out and unfinished jobs killed Thursday June 23rd, 2016 06:30 AM. The cluster will be put in standby mode during this period and will remain so until the work is finished and normal power operation is resumed to our PODS.
Normal operation is expected to resume from Friday June 24th, 2016 17:00 PM.
An email will be sent out after the queues are closed and the cluster is closed. Another email will be sent out when the cluster is opened to users again.
Thank you for you cooperation and patience in this matter.
Very best
Nilay
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