Brian, LANL have quite a bit of experience here. They are a high altitude site with significant HPC systems. The high altitude has caused measurable error rates in their computing hardware due to cosmic rays. They have even done tests like deliberately firing neutrons at their systems.
e.g. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?tp=&arnumber=1545894&isnumber=3 2989 .. not sure about any issue with beta radiation and clusters - most nodes are in metal boxes in metal racks? Daniel Dr. Daniel Kidger, Technical Consultant, Clearspeed plc, Bristol UK E: [EMAIL PROTECTED] T: +44 117 317 2030 M: +44 7738 458742 "Write a wise saying and your name will live forever." - Anonymous. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Oborn Sent: 16 June 2006 22:22 To: beowulf@beowulf.org Subject: [Beowulf] Acceptable rad limits for cluster rooms? The cluster for our Physics department is next to a room that, at the time of installation, was an empty accelerator hall. However, a new electron accelerator has been installed and the cluster room is now a mild radiation area. Before we start considering shielding options, I was wondering if anybody on this list could offer insight into "acceptable" radiation limits for normal, rackmount cluster nodes with ECC memory, and if there are energy threasholds in beta and gamma radiation that might be significant. Thanks for any input. Brian Oborn _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
