Difference: ComputingSL6T3 (1 vs. 2)

Revision 22015-02-28 - samir

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Changed:
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<		We're at the commissioning phase of the SL6 nodes for T3-Higgs. For that, Computing is providing a mirrored infra-structure, with all elements in SL6. You will have an interactive node called "t3-higgs-sl6" which is connected to SL6 worker-nodes.
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Changed:
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<		All features you had before should work transparently but to make sure there is no risk, we're going through commissioning.
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General status

 
Changed:
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<		Assumptions :
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>		We're at the commissioning phase of the SL6 T3-Higgs. For that, Computing is providing a mirrored infra-structure, with all elements in SL6. You will have an interactive node called "t3-higgs-sl6.ultralight.org" which is connected to SL6 worker-nodes.

All features that you had before should work transparently but to make sure there is no risk, we're going through commissioning.

 
Changed:
<
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  • Jobs submitted from the usual SL5 interactive node (t3-higgs.ultralight.org) will land on SL5 worker-nodes.
  • Jobs submitted from the new SL6 node, will land on SL6 worker-nodes.
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>		Assumptions :
 
Added:
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  • Jobs submitted from the usual SL5 interactive node (t3-higgs.ultralight.org) will land on SL5 worker-nodes. ~300 cores.
  • Jobs submitted from the new SL6 interactive node (t3-higgs-sl6.ultralight.org) , will land on SL6 worker-nodes. 32 cores for now.
 Items to test :
Changed:
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  • Workflows work as well
  • Home directories are fine and behave as expected (no visible slowness)
  • Compiling on home directories issue - Yi, Dustin and Alex know the issue well. There is hope that it will be gone on SL6.
  • Hadoop access works as well
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  • Workflows jobs run properly
  • Home directories are fine and behave as expected (no visible performance issue)
  • Compiling on home directories issue - it's a good idea to try it again and see if it's gone. We're using newer versions of NFS clients.

Attention

The login node, is a 2-core, 8 GB RAM machine. So be gentle with it. Once we're happy we will invert -- SL5 interactive will be "slow" and SL6 will be "fast". But until then please be aware that this will be a not-so-fast shared server between the users.

How to use it

Not much different from before, just make sure you login to $USER@t3-higgs-sl6.ultralight.org and work as usual.

Known problems

None at the moment. But please note that the whole infra-structure was not deployed with automated configuration-management tools (those are coming in few days).

 
Changed:
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<		Instructions will appear here once all is in place.
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>		That means that I did check that this works : ComputingInteractiveNodeRequirements but something could have slipped. Feel free to submit a ticket in the usual place. We will handle it as soon as possible.
  -- Main.samir - 2015-02-26

Revision 12015-02-26 - samir

Line: 1 to 1
Added:
>
>		We're at the commissioning phase of the SL6 nodes for T3-Higgs. For that, Computing is providing a mirrored infra-structure, with all elements in SL6. You will have an interactive node called "t3-higgs-sl6" which is connected to SL6 worker-nodes.

All features you had before should work transparently but to make sure there is no risk, we're going through commissioning.

Assumptions :

  • Jobs submitted from the usual SL5 interactive node (t3-higgs.ultralight.org) will land on SL5 worker-nodes.
  • Jobs submitted from the new SL6 node, will land on SL6 worker-nodes.

Items to test :

  • Workflows work as well
  • Home directories are fine and behave as expected (no visible slowness)
  • Compiling on home directories issue - Yi, Dustin and Alex know the issue well. There is hope that it will be gone on SL6.
  • Hadoop access works as well

Instructions will appear here once all is in place.

-- Main.samir - 2015-02-26

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