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on behalf of the NRC-KI Tier-1 team
Experience of creation and usage EOS-based data storage system on Tier-1 GRID cluster at NRC “Kurchatov Institute” Igor Tkachenko on behalf of the NRC-KI Tier-1 team National Research Centre "Kurchatov Institute“ Moscow, Russian Federation
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EOS-based disk storage detail
EOS (CERN) 6 pool nodes 1 head node XFS file system Hardware raid6
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Configuration files A lot of configuration files in different places (/etc/sysconfig/eos /etc/eos.keytab /etc/xrd.cf.*) Why not /etc/eos for all? Default values in configuration files Were changed just 4 lines for first start Pure documentation of configuration Documentation said “how”, but not “why” 4 hours from first installation to first run
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Pool creation eosfstregister does not work
To add pool I need to create pool record in cli and create files on pool with content from cli. No ways for automatization.
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Troubleshooting Log messages show nothing(for me)
/var/log/eos/mgm/xrdlog.mgm gz: :38:01 time= func=Activate level=CRIT logid=static tid=00007f708eb66720 source=Master: tident= sec=(null) uid=0 gid=0 name=- geo="" Unable to auto-load config standalone - fix your configuration file! “Install and forget” way. Since we start use EOS (and all configuration issues were fixed), I don’t look in logs and don’t know about any troubles. Is all fine for Alice too?
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Load issue Inetrnal network External network Load average (1/5/15)
2000 (!) TCP connections
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Space usage issue Used space / LFC used space = 3/1
AliEn SE Statistics Xrootd info SE Name AliEn name Size Used Free Usage No. of files Type RRC_KI_T1 - EOS ALICE::RRC_KI_T1::EOS 150 TB 35.4 TB 114.6 TB 23.6% 783,036 FILE 107 TB 43 TB 71.33% Used space / LFC used space = 3/1 All files from EOS in LFC
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