Monthly Archives: February 2015

Power failure 25 Feb 2015

Posted by on February 25, 2015 No comments

It seems there was a power failure at approx. 4:00 on 25/02/2015 in EC3-21 comms room. All nodes zeus[1-4,20-91,15,200-217] as well as file servers serving /home and /share directories went offline.

Some jobs in “long” queue continued to run. Check their status as a /home file system wasn’t accessible from 4:00…~11:00.

Regards,
Alex

Zeus HPC

Posted by on February 19, 2015 No comments

 

Zeus HPC consist of 4 login nodes (zeus[1-4]), 2 file servers (zeus[5-6], 15 Tb each), 2 backup machines and following compute nodes separated in different categories:

New (2016) Broadwell CPU based nodes:

  • 56 nodes with 2 x Intel(R) Xeon(R) Broadwell CPUs E5-2683 v4 @ 2.10GHz (32 CPU-cores/node) 128Gb RAM/node:   SLURM “–constraint=broadwell”

Amongst these 56 Broadwell nodes, there are

  • 10 nodes with 2 x Intel(R) Xeon(R) Broadwell CPUs E5-2683 v4 @ 2.10GHz (32 CPU-cores/node) 128Gb RAM/node + 2x NVidia Kepler K80 GPUs/node:  SLURM “–constraint=k80″
  • 2 nodes  with 2xIntel(R) Xeon(R) CPU E5-2683 v4 @ 2.10GHz (32 CPU-cores/node) 128Gb RAM + Xeon Phi coprocessor SE10/7120: SLURM “–constraint=phi”

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

In order to use Zeus HPC you need:

  • have a user account (apply my e-mailing Alex Pedcenko — aa3025(at)coventry.ac.uk).
  • connect to Zeus with ssh-session (see below the section “Connecting to HPC“)>
  • write or upload your code/executable/files/model etc via ssh/sftp (i.e. WinSCP under Windows, “scp” under Linux/Mac)
  • submit your job to one of the queues of Zeus (see below section SLURM)

In order to use compute nodes of Zeus to run your executable, code, or whatever software, you have to submit a job to the queue. This is done via SLURM queue manager, namely:

  • writing slurm job submission script
  • submitting the script to the queue (i.e. with “sbatch” command)

Openconnect-gui –opensource free Windows x86/64 alternative for Cisco anyconnect VPN Client

Posted by on February 7, 2015 No comments

If you are using windows (especially Windows 10 [update Sept-2015: now Cisco works with Win 10]), you may find that Cisco Openconnect VPN client for accessing University network from the outside is crashing on creating the connection. You can use opensource alternative openconnect:

 

https://github.com/openconnect/openconnect-gui/wiki

 

To connect use:

server: connect.coventry.ac.uk
username: your Uni one
Group: VPN
password: your Uni one

Alex

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