i3 Cluster

The I3 Cluster currently has 16 compute nodes; i{1-15}.Millennium.Berkeley.EDU

  • 16 HP Proliant_DL140 (specs)
    • Dual 3.06GHz Pentium 4 Xeon (533Mhz FSB)
    • 512K L2 cache
    • 2GB of RAM
    • 2 80GB 7500 rpm IDE disks
    • Broadcom 1000TX gigabit Ethernet
  • 1 HP Procurve 2848 Gigabit Switch

The IBM_Fast_Storage_Cluster provides high-speed shared file systems to this compute cluster.

Using the Cluster

This is an unscheduled shared resource. You can view the current use of the machines by running gstat or viewing the Ganglia graphs.

gstat provides an ordered list of available machines. Machines with a load >= 2 are fully loaded and should be avoided until current jobs have completed.

Run gexec to launch jobs.

   cd /work/$user
   gexec -n 10 hostname(returns the hostname of 10 machines)
   cp $home/foo /work/$user
   gexec -n 20 ./foo(runs foo on 20 machines)

For more information on using gexec, please see the documentation.

Filesystems

While you should be able execute jobs from your EECS department home directory, we strongly suggest that you launch all jobs from a /work/$user or /scratch/$user directory. Before executing a program, copy all binaries and data files into your /work or /scratch directory, cd into that directory, and execute from there. This avoids putting unnecessary load on EECS department fileservers, which are sometimes unable to handle many simultaneous mount requests.

Note: /work has a 30 day deletion policy. Files in /work untouched for 30 days will be purged without warning. /work is not for long-term storage and is never backed up. /work is shared with the PSI cluster.

/scratch has NO deletion policy; please clean up after yourself. /scratch is RAID 0 local to each machine. /scratch is never backed up.

 
i3.txt · Last modified: 2008/09/14 22:53 by mhoward
 
Except where otherwise noted, content on this wiki is licensed under the following license:CC Attribution-Noncommercial-Share Alike 3.0 Unported
Recent changes RSS feed Donate Powered by PHP Valid XHTML 1.0 Valid CSS Driven by DokuWiki