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HPSS for Archival Storage

HPSS for Archival Storage. Tom Sherwin Storage Group Leader, SDSC sherwint@sdsc.edu. Outline. Introduction to HPSS at SDSC HPSS Load and Usage Statistics HPSS Classes of Service File Behavior HPSS Futures. Introduction to HPSS at SDSC. 8 servers for movers (disk and tape)

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HPSS for Archival Storage

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  1. HPSS for Archival Storage Tom Sherwin Storage Group Leader, SDSC sherwint@sdsc.edu

  2. Outline • Introduction to HPSS at SDSC • HPSS Load and Usage Statistics • HPSS Classes of Service • File Behavior • HPSS Futures

  3. Introduction to HPSS at SDSC • 8 servers for movers (disk and tape) • 1 server for HiPPi mover • 20 3590 tape drives • 1.5 TB disk cache - 1TB MaxStrat, .5TB SSA • SP Switch • HPGN

  4. HPSS Load and Usage Statistics • 100TB stored in 9 million files • Average file size: 11MB • ~ 16,000 transactions per day • ~ 250-300GB moved per day • 650GB peak amount of data moved

  5. tiny 0KB-8KB small 8KB-2MB medium 2MB-200MB large 200MB-6TB tape 6TB+ SRB automatically selects COS based on file (container) size HPSS Classes of Service (COS)

  6. File behavior • data written to disk • data rate varies 4.5MB/sec and up • data copied to tape within one hour • data lifetime on disk cache • COS dependent, ~10 days for medium COS • data retrieval from tape • minimum 20-40 seconds for tape ready • user sees first byte when entire file is on disk

  7. HPSS Futures • HPSS 4.1.1 • General enhancements and fixes • Investigating STK 9840 technology • same data rates as 3590, 20GB per tape • 10-20 drives per silo wall, midpoint load • 3590 Upgrades to 256 tracks

  8. HPSS Futures (continued) • Disk Cache • Teraflop machine requires additional 3-5TB • Networking • HPGN access to CalREN2, vBNS, NTON

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