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Bench mark study for new technology archiving devices H.-J. Wolf K.-D Mißling, G. M.Pinna

Bench mark study for new technology archiving devices H.-J. Wolf K.-D Mißling, G. M.Pinna CEOS Subgroup ATT meeting ESRIN 9 May 2002. Bench mark study for new archiving devices. Introduction operation of remote sensing facilities  growing amount of sensor data

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Bench mark study for new technology archiving devices H.-J. Wolf K.-D Mißling, G. M.Pinna

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  1. Bench mark study for new technology archiving devices H.-J. Wolf K.-D Mißling, G. M.Pinna CEOS SubgroupATT meeting ESRIN 9 May 2002

  2. Bench mark study for new archiving devices Introduction operation of remote sensing facilities  growing amount of sensor data archiving subsystems separated from the acquisition  specialized computer peripheral shorter use time of archive technology  automated migration/ risk of non-matured devices replacement and phasing out of current (DLT 7000) drives Objectives: • computer compatible • handle- able by robot systems • high reliability of information • cost of the drive and media/ archiving capability  archiving costs per GB • transfer time/ access time  system provision delay • future of technology/ acceptance by the marked • current market : LTO, SDLT, AIT-2, AIT-3, 9840 B, 9940 A (B) presentation of ESA study results

  3. number of copies reliability of medium access time : reliability of information provision time bandwidth to user environmental conditions number of devices organization of data (HW(firm ware, ECC), SW) robot handling time maturity of device (technology) use time of technology : transfer rate administrative time/ HSM organization of data (cache,no-release, media- mix) IFs between archive elements Bench mark study for new archiving devices Approach • conservative selection ( not on basis of announcements) • consideration of system coherence Archive system presentation of ESA study results

  4. Bench mark study for new archiving devices roadmap of archive technologies presentation of ESA study results

  5. Bench mark study for new archiving devices Price for drives and media * list price in Europe, no consideration of discounts ** Price of DLT 8000 presentation of ESA study results

  6. Bench mark study for new archiving devices Test Configuration Hardware • Sun Server E450, 2x 480MHz/2 GB RAM • 12 x 36,4 GB Disk (10000UPM) • X 6541 A PCI Differential F/W-UltraSCSI Adapter (SDLT, LTO and AIT 2/3) • JNI 1063 FC-AL PCI Adapter (STK 9840 B, 9940 A, Loop Mode without Switch/Hup) • Ultra SCSI Differential F/W (HVD) to Ultra SCSI (LVD) Converter MSKL (Test LTO/ADIC; SDLT/ Quantum, ESA; AIT-2/Sony) Software • Solaris 8, kernel 108528-12 • Veritas Volume Manager Version 3.1.1 • dvt (Solaris Performance Test software) • SAM-FS Version 3.5.0-33 and 4.0.BD (last B-Version) LSC(nowSUN) Test drives LTO, SDLT, AIT-2, AIT-3, 9840 B, 9940 A presentation of ESA study results

  7. Bench mark study for new archiving devices Test file system • only SAM-FS file system • Veritas Volume Manager (RAID 0+1) using four drives (striped and mirrored) Test files • A mix of typical remote sensing data Off the shelf Measuring method • Solaris 8 tools • /usr/bin/time • iostat • SAM-FS tools • dvt • debugging and logging comparable, duplicable presentation of ESA study results

  8. Bench mark study for new archiving devices Measured Tape Capacities presentation of ESA study results

  9. Bench mark study for new archiving devices Measured Transfer Rate presentation of ESA study results

  10. Bench mark study for new archiving devices Measured Access Time (Position) presentation of ESA study results

  11. Bench mark study for new archiving devices COSTS per GB presentation of ESA study results

  12. Bench mark study for new archiving devices Conclusion • use of different technologies (AIT-2(AIT-3), LTO) • 9840x for high performance access (NRT, MOD- substitute) presentation of ESA study results

  13. Bench mark study for new archiving devices Future developments • Complete of the study: • load/ unload time of the drives • influence of block size variation on transfer time • influence of special data formats (e.g. L7-RawData, SARData ,ERS-low bit rate) • different platforms (e.g. SGI, PC(LINUX) ) • possibility of partitioning • drives support of diagnostics presentation of ESA study results

  14. Bench mark study for new archiving devices Future developments • Next activities • Monitoring of Roadmaps • New Technologies • Ultra Density Optical (UDO) 2003 30 GB 1. Generation 2.0 $/GB 2005 60 GB 2. Generation 1.0 $/GB 2007 129 GB 3. Generation 0.5 $/GB • Lots Technology (Laser optical tape) • Format: DTF-2 Tape from Kodak, licence Imation • Capacity: 1 TByte (once write) • Interface: Ultra-SCSI-2; FC-AL • Transfer Rate: 40 MB/s • Price drive: ~ 27 T$ • Price media: ~ 200 $/ 0.19$/GB • Not before end of 2003 presentation of ESA study results

  15. Bench mark study for new archiving devices The Challenges of Magnetic Recording on Tape for Data Storage, Richard H. Dee, Storage Technology Corporation, richard_dee@storagetek.com presentation of ESA study results

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