Infrastructure and services of the Tier2 , 2017

Computing Elements (CE)

*  Worker Node (WN)    279 compute nodes (2 x CPU Xeon, 4-14 cores per CPU, E54XX, X65XX, X56XX, ES-26XX v3 / 4, 2-4GB RAM per core) models SuperMicro Blade, SuperMicroTwin2, Dell FX. Since 4-16-core processors are actually independent processors on a single chip, we have in total:

3640 cores / slots
46866.52 HEP-SPEC06
11716.63 HEP-kSI2k

*  Software

  • OS: Scientific Linux release 6.9 (Carbon)
  • BATCH : Torque 4.2.10 (home made)
  • Maui 3.3.2 (home made)
  • CMS Phedex
  • ALICE VObox
Storage Elements(SE)

Storage System dCache :

* Hardware

1st – Disk for ATLAS & CMS  (Typically Supermicro and DELL)

  • 24 disk servers: 2 x CPU 24GB RAM, 24 SATA h/w RAID6, 43-63TB
  • 4 disk servers: 2 x CPU (Xeon E5-2660 v3 @ 2.60GHz); 128GB RAM; 76TB ZFS (16x6000GB NL SAS); 2x10G

Total space: 1332GB

  • 2 head node machines: 2 x CPU (Xeon E5-2683 v3 @ 2.00GHz); 128GB RAM; 4x1000GB SAS h/w RAID10; 2x10G.
  • 7 KVM (Kernel-based Virtual Machine) for access protocols support.

2nd – Disk for ALICE, EOS + XROOTD cluster

  • 12 disk servers: 2 x CPU 24GB RAM, 24 SATA h/w RAID6, 10-63TB
  • 2 disk servers: 2 x CPU (Xeon E5-2660 v3 @ 2.60GHz); 128GB RAM; 76TB ZFS (16x6000GB)

Total space: 587GB.

  • 2 head node machines: 2 x CPU (Xeon E5-2683 v3 @ 2.00GHz); 128GB RAM; 4x1000GB SAS h/w RAID10; 2x10G.
  • 4 KVM machines for access protocols support

3-rd Disk for some EGI Vos & local users

  • 12 disk servers Core2 Duo CPU E8400, 4GB RAM, 12 x SATA h/w RAID6, 8TB
  • 1 disk server 2 x CPU 24GB RAM, 24 SATA h/w RAID6, 63TB

Total space: 147TB

* Software:

  • dCache-2.16
  • Enstore 4.2.2 for tape robot.
  • EOS aquamarine
  • XROOTD 3

The use of storage resources by LHC Virtual Organizations (September 2017) :

  • ALICE @ xrootd & EOS
    Total:     587.45 TB 601544.79 GB
    Free:      216.14 TB 221329.70 GB 36.79%
    Used:     371.30 TB 380215.10 GB 63.21%
  • ATLAS @ dcache
    Total:    660.33 TB 660329.52 GB
    Free:     204.17 TB 204174.05 GB 30.92%
    Used:    456.15 TB 456153.25 GB 69.08%
  • CMS @ dcache
    Total:   662.02 TB 662016.25 GB
    Free:    43.02 TB 43020.29 GB 6.50%
    Used:   572.43 TB 572428.87 GB 86.47%

Distribution of counting resources JINR-LCG2  by Virtual Organizations (September 2017)  :

  • alice 15%
  • atlas 20%
  • cms 20%
  • lhcb 15%
  • The tasks of other VO and local users are considered on the farm.