[auton-users] Auton Cluster Maintenance on Monday

[Michael J. Baysek]

Correction, MONDAY July 11th.

-- 
Michael J. Baysek
Systems Analyst
Carnegie Mellon University / Auton Lab
412-268-8939 - mjbaysek at cs.cmu.edu
http://www.autonlab.org







On 07/08/2011 11:38 AM, Michael J. Baysek wrote:
> Hi Lab,
>
> On this coming Monday, July 10th starting at 8:00 AM, I will be
> taking advantage of the relatively quiet system activity and will
> be shutting down the Auton central compute system in order to
> perform system maintenance.  This work will set us up with the
> extra storage and performance we will need in the coming months
> and years.
>
> The maintenance includes:
>
> * Switch File server to Scientific Linux 6 OS, a RHEL clone.
> * Switch Linux file services to NFS4 file protocol.
> * Switch to larger disk array.
> * Improvements in file performance over NFS.
> * Software upgrade of primary Firewall server, time permitting.
>
> During this maintenance, many services will be unavailable.
>
> * /auton space, by all access methods.
> * All compute nodes.
> * CVS and Subversion.
> * Network copies of Eclipse, Netbeans, Matlab, etc.
> * MySQL server on LYRE.
> * ViewVC.
>
> These services are among those that will be largely unaffected, but
> they may be restarted or briefly interrupted throughout the course
> of the maintenance:
>
> * TCWI instances.
> * LOT1 (Project Server).
> * GD1 (Project Server).
> * Bugzilla.
> * SDSS.
>
> I plan to begin the maintenance at 8 AM.  The work will last into
> the afternoon.
>
> For Lab Staff with desktop workstations:
>
> This work requires me to forcibly unmount /auton from all machines
> that mount it, so it's best to log out of your workstation on Friday
> (Today) when you leave the office.  If you must leave processes
> running, any processes that have open file handles to /auton space
> will hang forever.  They will not 'pick up where they left off' when
> the server comes online, like they usually would during a server
> outage.  It would be best to keep any processes accessing files only
> on your local disk.
>
> If you have any questions regarding the planned outage, or a specific
> service, please drop me a mail.
>
> Mike
>
> P.S. /auton will need to be force unmounted from the NEILL system as
> a result of this work.  This maintenance should not affect the NEILL
> system *unless you are accessing files from /auton*.  If you are, those
> processes will hang indefinitely.
>
>
>
>
>
>