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Long-term Preservation as a Relay Greg Janée University of California at Santa Barbara.

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Presentation on theme: "Long-term Preservation as a Relay Greg Janée University of California at Santa Barbara."— Presentation transcript:

1 Long-term Preservation as a Relay Greg Janée University of California at Santa Barbara

2 NDIIPP partners meeting Typical preservation effort recent content now take action now years

3 NDIIPP partners meeting Ein Gedankenexperiment old content now - 50now + 50now take action content ancient content “mid-century perspective”

4 NDIIPP partners meeting Mid-century perspective Repeated migrations across storage media and storage systems –past and future Repeated migrations across archive systems –each possibly necessitating transformation and reorganization of archived content Repeated handoffs between institutions –each implementing different policies

5 NDIIPP partners meeting Time T 0 Archival objects over time usable unusable

6 NDIIPP partners meeting increasing obsolescence T years

7 NDIIPP partners meeting total obsolescence T years

8 NDIIPP partners meeting new derivative T years

9 NDIIPP partners meeting repeated obsolescence T years

10 NDIIPP partners meeting repeated migration T years

11 NDIIPP partners meeting T years

12 NDIIPP partners meeting Information value, resource availability vary over time Need Shirky’s “option to do nothing” Need a representation of archival objects that is ultra-low-cost, resurrectable Equivalent of cardboard box in the basement Mummification archive handoff mummified form embalm resurrect

13 NDIIPP partners meeting Questions How can we facilitate handoffs? How can we facilitate mummification? –particularly in cases of archive failure? How can we make resurrection possible? –will always be hard archive handoff mummified form embalm resurrect

14 NDIIPP partners meeting Handoff architecture archive OAIS exportingest archive logical data model physical data model storage virtualization layer logical data model physical data model interop best practices

15 NDIIPP partners meeting Logical data model must capture all information required to resurrect, reuse objects Must include archival of format specs, metadata, contextual information, transitive closure of dependencies Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

16 NDIIPP partners meeting Physical data model must fully and simply represent logical data model No vendor lock-in Suggestion: files, filesystems, manifests Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

17 NDIIPP partners meeting Storage virtualization layer supports intra- and inter-archive handoffs Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

18 NDIIPP partners meeting Combination of complete resurrection information with a simple physical representation means… Mummification is a NO-OP Handoff architecture archive logical data model physical data model storage virtualization layer OAIS interop best practices

19 NDIIPP partners meeting Format registries Archives reference registries Registries must capture, archive format specifications Must represent formats as archival objects Offer transitive extraction service archive format registry reference extract

20 NDIIPP partners meeting Discussion topics Characterization of ingest vs. handoff Filesystem-like representation for mummification? Standardization of logical, physical data models possible?


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