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| == Service Details == | | == Service Details == |
| The [[RAL Tier1]] runs several [[Computing Element|computing element]]s or CEs. These are | | The [[RAL Tier1]] runs several [[Computing Element|computing element]]s or CEs. These are |
− | '''lcgce02.gridpp.rl.ac.uk''', '''lcgce03.gridpp.rl.ac.uk''', '''lcgce04.gridpp.rl.ac.uk''' and '''lcgce05.gridpp.rl.ac.uk'''. | + | '''arc-ce01.gridpp.rl.ac.uk''', '''arc-ce02.gridpp.rl.ac.uk''', '''arc-ce03.gridpp.rl.ac.uk''' and '''arc-ce04.gridpp.rl.ac.uk'''. |
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− | These feed jobs to a remote [[Torque]] batch server currently hosted on '''csflnx353.rl.ac.uk''' | + | These feed jobs to a large HTCondor pool. |
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− | == SubClusters ==
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− | There are currently four [[Glue]]Clusters and [[Glue]]SubClusters published by all CEs. These
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− | SubClusters are identical in every way other than their values for memory. An additional Cluster and SubCluster is published on lcgce03.gridpp.rl.ac.uk and lcgce05.gridpp.rl.ac.uk to provide a 3000MB queue for Atlas.
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− |
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− | (Note that this example only shows lcgce02 for clarity, in practice this query would show all CEs)
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− |
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− | $ ldapsearch -x -H ldap://site-bdii.gridpp.rl.ac.uk:2170 \
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− | -b 'Mds-vo-name=RAL-LCG2,o=grid' '(objectClass=GlueSubCluster)' \
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− | GlueSubClusterName GlueHostMainMemoryRAMSize
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− |
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− | # lcgce02.gridpp.rl.ac.uk, lcgce02.gridpp.rl.ac.uk, RAL-LCG2, grid
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− | dn: GlueSubClusterUniqueID=lcgce02.gridpp.rl.ac.uk,GlueClusterUniqueID=lcgce02
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− | .gridpp.rl.ac.uk,mds-vo-name=RAL-LCG2,o=grid
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− | GlueHostMainMemoryRAMSize: 512
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− | GlueSubClusterName: lcgce02.gridpp.rl.ac.uk
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− |
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− | # 700-lcgce02.gridpp.rl.ac.uk, 700-lcgce02.gridpp.rl.ac.uk, RAL-LCG2, grid
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− | dn: GlueSubClusterUniqueID=700-lcgce02.gridpp.rl.ac.uk,GlueClusterUniqueID=700
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− | -lcgce02.gridpp.rl.ac.uk,mds-vo-name=RAL-LCG2,o=grid
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− | GlueHostMainMemoryRAMSize: 700
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− | GlueSubClusterName: 700-lcgce02.gridpp.rl.ac.uk
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− |
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− | # 1000-lcgce02.gridpp.rl.ac.uk, 1000-lcgce02.gridpp.rl.ac.uk, RAL-LCG2, grid
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− | dn: GlueSubClusterUniqueID=1000-lcgce02.gridpp.rl.ac.uk,GlueClusterUniqueID=10
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− | 00-lcgce02.gridpp.rl.ac.uk,mds-vo-name=RAL-LCG2,o=grid
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− | GlueHostMainMemoryRAMSize: 1000
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− | GlueSubClusterName: 1000-lcgce02.gridpp.rl.ac.uk
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− |
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− | # 2000-lcgce02.gridpp.rl.ac.uk, 2000-lcgce02.gridpp.rl.ac.uk, RAL-LCG2, grid
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− | dn: GlueSubClusterUniqueID=2000-lcgce02.gridpp.rl.ac.uk,GlueClusterUniqueID=20
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− | 00-lcgce02.gridpp.rl.ac.uk,mds-vo-name=RAL-LCG2,o=grid
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− | GlueHostMainMemoryRAMSize: 2000
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− | GlueSubClusterName: 2000-lcgce02.gridpp.rl.ac.uk
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− |
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− | We have subclusters for 512, 700, 1024 and 2048 megabyte resources named lcgce02.gridpp.rl.ac.uk, 700-lcgce02.gridpp.rl.ac.uk, 1000-lcgce02.gridpp.rl.ac.uk and 2000-lcgce02.gridpp.rl.ac.uk respectively.
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− |
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− | A job submitted via an [[Work Load Management|RB]] with [[JDL]] containing a requirement of
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− |
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− | Requirements = (other.GlueHostMainMemoryRAMSize>600) ;
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− |
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− | would only match the last three sub clusters and consequently be submitted to the batch system requesting 700, 1000 or 2000 megabytes of memory.
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| [[Category:RAL Tier1]] | | [[Category:RAL Tier1]] |
These feed jobs to a large HTCondor pool.