☄ Epic: Migrate ActiveFedora to Pg backed Valkyrie

[jillpe]

Summary

GBH would like to upgrade their app to a Valkyrie backend, so their data stores in a hierarchy structure. Their current records are stored in Fedora. They would like their current records and any future records to be stored in Postgres.

• App is upgraded to Valkyrie with adapter
• Adapter is customized so it can read from Postgres or Fedora, but only write to Postgres
• New records that are created are written to Postgres
• Script to migrate old records to Postgres is running

To Do:

First Step:

• Migrate an active fedora written model to valkyrie wings #36
• ☄️ Configure a combo storage adapter and query adapter that read/write from both PG and Fcrepo #37
• Write a script and background job set to read and write every object #38
• can deploy / make live once above are complete

Second Step:(can be done in parallel, but dependent on completion of first step)

• Work type is Wings(GenericWork) instead of GenericWork #39
• namespaces of data are different: #40
• Port combo adapter to AMS #41
• Prototype combo storage adapter (in Hyrax) to only write to Postgres and not write to fcrepo #42
• can deploy / make live once above are complete

Third Step:(dependent on completion of second step)

• Test that data can now be read #43