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RAL Tape system. Setup. SL8500 tape library, 10K slots for T1 18 T10KA 9 T10KB 14 T10KC SL8500 Tape library, 10K slots for facilities 3 9940B 16 T10KA 10 T10KB 10 T10KC. Repack . Single head node running all repack “bits” 4 DEL R510 12 bay disk servers as disk cache

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Presentation Transcript
setup
Setup
  • SL8500 tape library, 10K slots for T1
    • 18 T10KA
    • 9 T10KB
    • 14 T10KC
  • SL8500 Tape library, 10K slots for facilities
    • 3 9940B
    • 16 T10KA
    • 10 T10KB
    • 10 T10KC
repack
Repack
  • Single head node running all repack “bits”
  • 4 DEL R510 12 bay disk servers as disk cache
    • 900GB 10K SAS drive, 23GB memory
    • Raid6
  • Part of 10Gb network
  • Tape drives dedicated as required
  • Running 2.1.12-10
repack lhcb
Repack - LHCb
  • Used to migrate all of LHCb’s data
    • 2334 A tapes
    • ~1PB data
  • Took about 1 month
  • Only one tape found with errors, 4 files lost
repack performance
Repack - performance
  • Graph shows network for the 4 disk servers during repacking
repack performance1
Repack - Performance
  • This shows performance for write to one of the C tape drives
other
Other
  • Repack
    • Will our setup scale to cope with D drives?
  • Support for D drives
  • Any CDK development now Oracle have “new” version.
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