HTCUpgrade

Overview

We plan to upgrade HTCondor from version 8.9 to 9.0.
The main benefits of the new version is to be compatible with tokens, the replacement of certificates for GRID authentification.
As it is a major change, it will require a complete reinstallation of all services.
But this WILL NOT impact your jobs, as compute resources are drained only when empty. You will be able to access jobs on both cluster versions.

Migration Schedule

As of 04/07, already 70% of job slots have been migrated.
Most of GRID jobs are already using the new version.

For you to have a more transparent experience during this upgrade, please always use mshort.iihe.ac.be or mlong.iihe.ac.be to connect to the cluster.

• Monday 04/07 8PM
  • m1 will be excluded from mshort
  • m4/m5 will be excluded from mlong

• Tuesday 05/07 8PM
  • m1/m4/m5 will not be accessible anymore and will be reinstalled

• Wednesday 06/07 12AM
  • m2/m3 will be excluded from mshort
  • m6/m7 will be excluded from mshort
  • mshort will lead to upgraded HTC on m1
  • mlong will lead to upgraded HTC on m4/m5

• Wednesday 06/07 8PM
  • m2/m3/m6/m7 will not be accessible anymore and will be reinstalled

• Thursday 07/07 12AM
  • mshort will lead again to m1/m2/m3
  • mlong will lead again to m4/m5/m6/m7

How to keep access to your jobs

As the 2 HTCondor versions will be live in parallel, you will still be able to manage your jobs on the old HTC version from the upgraded mX machines (and vice-versa).

• Old HTC version:

condor_q <==> condor_q -n schedd01 <==> condor_q -pool testumd-htcmaster.wn.iihe.ac.be -name schedd01

• New HTC version:

condor_q <==> condor_q -n schedd03 <==> condor_q -pool cm.wn.iihe.ac.be -n schedd03

So once the mX machines are upgraded, you will be able to access the old HTC verion cluster with:

condor_q -pooltestumd-htcmaster.wn.iihe.ac.be -name schedd01

Or on the contrary, directly start submitting on the new HTC version cluster from the yet-to-be-upgrade mX machines (ie you can do it right now) with:

condor_submit -pool cm.wn.iihe.ac.be -n schedd03 MYFILE.SUB
condor_q -pool cm.wn.iihe.ac.be -n schedd03