ComputingTopics < Main

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---+ Computing Topics

Intended to contain all topics to be discussed in meetings. Between an agenda and a notebook.

---++ /raidX deprecation and new homes

Pretty complex plan described in the thread "Migration of $HOME/raidX to DFS". The idea is to get rid of all RAIDs and turn them into hadoop datanodes. the $HOME area will be in an actual RAID5 + HSP. 20 TB of space.

---++ Condor Migration

Supposed to happen in July 16th. 260 cores already in Condor. 80 on their way. SGE will be decommissioned by then.

---++ AAA Usage - tests and instructions

   * We have ComputingAAATests which is intended to be a knowledge base of the group of that works or not in terms of Xrootd access.
   * In principle, works at any site that has a proper site-local-config.xml. 
      * The basic procedure with CRAB is - tell it to ignore data location, whenever it runs, it won't find the data, fallback to Xrootd, query the redirector for the file and in principle run fine.
   * Tested in the T3. Works as long as we have $X509_USER_PROXY defined to a location in a shared filesystem.

---++ CRAB 3 testing

We might get some interesting suggestions of exercise for CSA14, including usage of MINIAOD. Despite of that we should evaluate/commission usage of CRAB3 by itself.

Here is the [[https://twiki.cern.ch/twiki/bin/view/CMSPublic/WorkBookCRAB3Tutorial][page]] that contain instructions for CRAB3.

-- Main.samir - 2014-07-10

This topic: Main > ComputingTopics
Topic revision: r1 - 2014-07-10 - samir

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