Description and scope of the service

From Lsdf
Revision as of 19:16, 30 May 2016 by Jvw (talk | contribs)

The service for long time storage 'BWDA' offers the following storage classes:

Name Max avg. access time Storage Location # of copies physical separation comment
Class 1 <10 seconds disk only 1 na high available RAID6/E2EDI
Class 2 <10 minutes disk cache in front of tape 1 na disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times
Class 3 <10 hours tape only 2 2 locations regular archive storage comparable to azure, aws
Class 4 <10 hours tape only 2 2 locations super safe storage. targeting 20 nines. Second location with different technology

COS definitions

  • 1 default (no resources)
  • 0123 GridKa, 1 copy, size < ? GB
  • 1102 GHI
  • 1103 GHI
  • 1104 GHI Metadata
  • 1205 Medium, 2 Copies, Size < 500 GB (Physical < 640 GB)
  • 1204 Large, 2 Copies, Size < 2000 GB (Physical < 8000 GB)
  • 1206 BioQuant, 2 copies, size < 10 GB (physical < 12 GB)
  • 1302 Unknown
  • 1303