[Clas_offline] Fwd: [Jlab-scicomp-briefs] Reminder: JLab HPC, farm, storage outage for Lustre upgrade Tue Feb 23 8am (and Feb 24 if needed)

[Harut Avakian]

-------- Forwarded Message --------
Subject: 	[Jlab-scicomp-briefs] Reminder: JLab HPC, farm, storage outage 
for Lustre upgrade Tue Feb 23 8am (and Feb 24 if needed)
Date: 	Mon, 22 Feb 2016 13:16:51 -0500 (EST)
From: 	Sandy Philpott <philpott at jlab.org>
To: 	jlab-scicomp-briefs at jlab.org



All, a reminder of tomorrow morning 8am outage for Lustre upgrade.

Sandy

----- Original Message -----
From: "Sandy Philpott" <philpott at jlab.org>
To: jlab-scicomp-briefs at jlab.org
Sent: Wednesday, February 17, 2016 9:40:51 AM
Subject: JLab HPC, farm, storage outage Tue Feb 23 (and Feb 24 if needed)

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   https://www.jlab.org/div_dept/cio
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