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<td>[Jlab-scicomp-briefs] JLab HPC, farm, storage outage Tue
Feb 23 (and Feb 24 if needed)</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Wed, 17 Feb 2016 09:40:51 -0500 (EST)</td>
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<td>Sandy Philpott <a class="moz-txt-link-rfc2396E" href="mailto:philpott@jlab.org"><philpott@jlab.org></a></td>
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<td><a class="moz-txt-link-abbreviated" href="mailto:jlab-scicomp-briefs@jlab.org">jlab-scicomp-briefs@jlab.org</a></td>
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<pre>Dear JLab HPC, Farm, and MSS Users,
We are planning updates to our Lustre 2.5.3 filesystem on Tuesday Feb 23, that will impact the HPC and batch farm clusters and their storage; the Lustre-based /mss, /cache, /work, and /volatile filesystems will be unavailable. File services may be restored at the end of the day Tuesday, or if more time is needed we may continue through Wednesday close-of-business. This Lustre update is part of our continuing effort to improve the stability of the Lustre and ZFS fileservers that have been intermittently problematic since our upgrade from Lustre 1.8 started last May.
Upon restoring Lustre filesystem services, our plans are to
- add the 2 newest 2015 fileservers into production, an additional 0.5 PB into our existing 1.2 PB /lustre filesystem, then later decommission the oldest 2011 servers
- implement a Lustre "work" pool for the farm, to better handle small random files, with each 12-disk set configured as 3 mirrors of 4 striped disks
Please plan accordingly for this scheduled one or two day upgrade of the Lustre filesystem next week.
Regards,
Sandy
Sandra C. Philpott, Operations Manager
High Performance and Scientific Computing
Thomas Jefferson National Accelerator Facility
12000 Jefferson Ave. Ste 3 Newport News, VA 23606
757-269-7152 <a class="moz-txt-link-freetext" href="https://www.jlab.org/div_dept/cio">https://www.jlab.org/div_dept/cio</a>
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