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In the IU computer science department, Thomas Reichherzer and Geoffrey Brown are working on tools to aid "preservation via emulation".

Building an integrity checker

If all goes well, an integrity checker will never report a problem. But a non-existent or non-running integrity checker would exhibit the same behavior. So we must set up tests that ensure the integrity checker is regularly exercised. One simple way would be to put an object in the repository and purposefully corrupt it, then measure how long it takes for the integrity checker to notice.

Open questions

  1. Can we eventually store lots of small files (page images) directly in HPSS via the filesystem interface without aggregation, or will it simply take too long to retrieve these files?
  2. Should we store copies of our metadata in HPSS, or are the regular server backups good enough for this?