Current news...


Scratch disk on macomp01 unusable

The scratch disk mounted on /scratch on macomp01 and accessible cluster-wide as /scratchcomp01 has become inaccessible sometime between the afternoon of May 24th and Thursday morning, May 26th. This may be a temporary problem resolvable through a reboot so macomp01 has been taken offline from the Torque/Maui queueing system and is not accepting any new jobs although the existing jobs running on it will be allowed to run to completion. Once it is free of running jobs, it will be rebooted.

If a reboot does not resolve this problem, the disk is almost certainly faulty and will have to be replaced. This is a good time to remind all users that the scratch disks on the compute cluster machines are literally just that - meant for temporary storage and not for long term retention of important data since none of the scratch disks are backed up.

Silo upgrade

silo was substantially upgraded at the weekend is back up & online. The documentation is currently in the process of being revised as some things have changed but for most users, nothing has changed although you will probably have to delete the existing ssh host key for silo from your ~/.ssh/known_hosts file before connecting to it for the first time using scp, sftp or ssh.


Older news items:

May 21st, 2011: Announcing completion of silo upgrades
May 16th, 2011: Announcing upgrades for silo
April 14th, 2011: Goodbye SCAN 3, hello SCAN 4
March 26th, 2011: quickstart guide to using the Torque/Maui cluster job queueing system
March 9th, 2011: automatic laptop backup/sync service, new collaboration systems launched
May 20th, 2010: Scratch disks are now available on all macomp and mablad compute cluster systems
March 11th, 2010: Introduing job queueing on the Fünf Gruppe compute cluster
October 16th, 2008: Introduing the Fünf Gruppe compute cluster
June 18th, 2008: German City compute farm now expanded to 22 machines
February 7th, 2008: new applications on the Linux apps server, unclutter your desktop
November 13th, 2007: aragon and cathedral now general access computers, networked Linux Matlab installation upgraded to R2007a
September 14th, 2007: Problems with sending outgoing mail for UNIX & Linux users
July 23rd, 2007: SCAN available full-time over the summer vacation, closure of Imperial's Usenet news server
May 15th, 2007: Temporary SCAN suspension, closure of the Maths Physics computer room, new research computing facilities
January 14th, 2005: Exchange mail server upgrade, spam filtering with pine and various other enhancements


Andy Thomas

Research Computing Officer,
Department of Mathematics

last updated: 26.05.2011