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Message ID: 9618     Entry time: Mon Feb 10 18:03:41 2014
Author: jamie 
Type: Update 
Category: CDS 
Subject: 12 core c1sus replacement 

I have configured one of the spare Supermicro X8DTU-F chassis as a dual-CPU, 12-core CDS front end machine.  This is meant to be a replacement for c1sus.  The extra cores are so we can split up c1rfm and reduce the over-cycle problems we've been seeing related to RFM IPC delays.

I pulled the machine fresh out of the box, and installed the second CPU and additional memory that Steve purchased.  The machine seems to be working fine.  After assigning it a temporary IP address, I can boot it from the front-end boot server on the martian network.  It comes up cleanly with both CPUs recognized, and /proc/cpustat showing all 12 cores, and free showing 12 GB memory.

The plan is:

  1. pull the old c1sus machine from the rack
  2. pull OneStop, Dolphin, RFM cards from c1sus chassis
  3. installed OneStop, Dolphin, RFM cards into new c1sus
  4. install new c1sus back in rack
  5. power everything on and have it start back up with no problems

Obviously the when of all this needs to be done when it won't interfere with locking work.  fwiw, I am around tomorrow (Tuesday, 2/11), but will likely be leaving for LHO on Wednesday.

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