HPSS for Archival Storage Tom Sherwin Storage Group Leader, SDSC

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Presentation transcript:

HPSS for Archival Storage Tom Sherwin Storage Group Leader, SDSC

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) 1 server for HiPPi mover tape drives 1.5 TB disk cache - 1TB MaxStrat,.5TB SSA SP Switch HPGN

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

HPSS Classes of Service (COS) tiny0KB-8KB small8KB-2MB medium2MB-200MB large200MB-6TB tape6TB+ SRB automatically selects COS based on file (container) size

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 seconds for tape ready –user sees first byte when entire file is on disk

HPSS Futures HPSS –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

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