Difference: Install_Scientific_Linux7 (24 vs. 25)

Revision 252019-06-04 - AsokaDeSilva

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Install Scientific Linux 7

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Important Note for 2019

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During 2019, grid sites will be migrating to Scientific Linux 7 and the grid will have a mix of Scientific Linux 6 and 7 resources. Atlas release 21 and newer (ie CMake releases) do not get recompiled on the grid; as such, if you send ATLAS jobs compiled on SL7 platforms to the grid, and if they land on SL6 resources, they will fail.
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During 2019, grid sites will be migrating to CentOS7 and the grid may have a mix of Scientific Linux 6 and CentOS7 resources for a while; the current status can be found here. Although the grid site migration to CentOS7 has a deadline of 1 June 2019, there are still some sites at the tail end of the migration. However Tier3 sites should consider their migration to CentOS7, if not already done.
 
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The recommended solution is to use SL6 interactive machines for any ATLAS 21 releases that needs compilation and then submit to the grid; this should work everywhere during this transition period. If you do not have access to a SL6 interactive machine, you can do one of the following:
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Atlas release 21 and newer (ie CMake releases) do not get recompiled on the grid. As such, if users send ATLAS jobs compiled on CentOS7 platforms to the grid, and if they land on SL6 resources, they will fail. The way to avoid this is one of the following methods:
  • to submit from CentOS7 machine to the grid using --osMatching option for prun --osMatching ... or pathena --osMatching ....
  • to compile and submit using a container from a CentOS7 machine; ie do setupATLAS -c slc6 to checkout, compile, submit. See this page for details.
  • use lxplus6.cern.ch to checkout, compile and submit. (but lxplus6 machines may get rarer to find.)

Other known CentOS7 issues are described in this Twiki page.

 

Required packages

 
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