[Chtc-users] HPC Cluster reboot tomorrow (10/28)at 1pm; HTC reboot in progress

[chtc-users@xxxxxxxxxxx]

Greetings,

As promised, we are writing to provide notice that the HPC Cluster will be rebooted at 1:00pm tomorrow, October 28 (Friday). Implications for HPC Cluster users are listed in the previous email, below.

The HTC System submit servers have been rebooted. Execute servers are still gradually being rebooted over the next 24 hours, so it's still possible that running jobs will be interrupted between now and mid-day tomorrow (Friday).

Thank you, again,Âfor your patience while we secure CHTC compute systems with the patch for this linux security vulnerability; please send emails to chtc@xxxxxxxxxxx.

Cheers,

Your CHTC Team

On Wed, Oct 26, 2016 at 5:40 PM, Lauren Michael <lmichael@xxxxxxxxxxx> wrote:

Greetings CHTC Users,

A linux security vulnerability has become apparent and will require a full reboot of all CHTC servers ASAP. We will start rebooting servers in our HTC System tomorrow (October 27) at noon, and servers in the HPC Cluster will be rebooted at a later time that we'll announce tomorrow.

For users of our HTC System:

• submit servers will be briefly unavailable when they're rebooted (including group-owned submit servers)
• execute servers will be gradually rebooted over the course of 24 hours, starting at noon tomorrow (Thursday, Oct. 27)
• jobs that are running when the execute servers are rebooted will be evicted, but HTCondor will keep them in the queue and automatically re-run them

For users of our HPC Cluster:

• jobs running when the head node and execute nodes are rebooted will need to be resubmitted
• the exact time of the reboot will be announced tomorrow, likely to take place tomorrow afternoon or on Friday

We thank you for your patience and understanding while we work to keep our compute systems secure for all users. As always, please send any questions to chtc@xxxxxxxxxxx, rather than replying to this email.

Happy Computing,

Your CHTC Team

--

Lauren Michael -ÂResearch Computing Facilitator,ÂUniversity of Wisconsin - Madison

Center for High Throughput Computing;ÂAdvanced Computing Initiative;ÂWisconsin Institute for Discovery;ÂACI-REF

www.tinyurl.com/LMichaelCalendar, Discovery 2264, (608)316-4430