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DSS/Db Backups/HSM Overview

DSS/Db Backups/HSM Overview. David Wolfe. DSS-I. 102 CD ROM set POSS-I red XE plates SERC-J blue S plates Compressed ~10X http://archive.stsci.edu/cgi-bin/dss_form. DQVS. Palomar Quick-V GSC-I construction plates 39 CD ROM set Compressed ~10X

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DSS/Db Backups/HSM Overview

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  1. DSS/Db Backups/HSM Overview David Wolfe

  2. DSS-I • 102 CD ROM set • POSS-I redXE plates • SERC-J blueS plates • Compressed ~10X • http://archive.stsci.edu/cgi-bin/dss_form

  3. DQVS • Palomar Quick-V • GSC-I construction plates • 39 CD ROM set • Compressed ~10X • http://archive.stsci.edu/cgi-bin/dss_form

  4. XDSS • RED ( III-aF) • POSS-II XP images • Completed 897 out of 897, 100% • UK Schmidt XS images • Completed 592 out of 606, 98% • UK Schmidt ER images • Completed 270 out of 288, 94% • Compressed ~10X • Contained on Volumes 0001-0390 • Completed by end of 2000 • http://archive.stsci.edu/cgi-bin/dss_form

  5. XDSS(cont) • BLUE (III-aJ) • POSS-II XJ images • Completed 897 out of 897, 100% • Contained on Volumes 1001-1226 • INFRARED (IVN) • POSS-II XI images • Completed 340 out of 897, 38% • Contained on Volumes 2001-2084 • UK Schmidt IS images • Completed 151 out of 894, 16% • Contained on Volumes 3001-3043 • Compressed ~10X • Completed by mid 2001, telescope limited • http://archive.stsci.edu/cgi-bin/dss_form

  6. XDSS(cont) • Headers • Headers for all XDSS second generation scans • ftp://ftp.stsci.edu/software/casb/xdss/

  7. DB BACKUPS • DataBase about 1TB • How to handle such a large volume • Old method • Stand alone DLT drive, NT Backup • 9-10 hours per tape • 15+ tapes

  8. DB BACKUPS (cont) • New method • BackupExec by Veritas • DLT jukebox, 8 cartridges • Breakup into North and South • High through put • Less user interaction

  9. DB BACKUPS (cont) • Importance of the Backups • Large system, just in case of errors • Already had to use previous backups • Replaced corrupted files • Time Frame • Plans are for monthly • Minimal impact to production

  10. HSM • Hierarchical Storage Management • DiskXtender by OTG • Large storage by using DLT jukeboxes • 2 - 46 DLT tape jukeboxes • ~60GB/tape • Storing processing data • OOP, cutouts, deblend, rank…

  11. HSM (cont) • Ease of retrieval • All files visible from explorer • Right click on file to retrieve • Limited by physical disk space

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