Thomas Mueller created OAK-3314:
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Summary: DataStore / BlobStore garbage collection: move to trash
instead of delete
Key: OAK-3314
URL: https://issues.apache.org/jira/browse/OAK-3314
Project: Jackrabbit Oak
Issue Type: New Feature
Components: blob
Reporter: Thomas Mueller
Bugs in datastore garbage collection are quite severe, because if binaries that
are still needed are deleted, then recovering from the problem is problematic
and slow: restoring a backup is needed, if there is a backup.
To speed up and simplify recovering from a missing binary, instead of deleting
files directly, they could be moved to "trash" (directory, or marked as trash).
When trying to access such an entry, the data store / blob store could fail (as
it does now), so that manual intervention is needed. Or it could recover
automatically, but log an exception.
"Trash" could also be moved to a slower disk, compressed, stored in generations
(trash_1, trash_2,...).
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