[elephant-devel] Backup and migration

[Leslie P. Polzer]

I have modified the migrate functionality to do just a backup,
i.e. disabled the part where in-memory objects and indices
are updated to point at the target store.

In the current version, all MIGRATE functions/methods are renamed
to BACKUP and take a :MIGRATE key argument so they can decide
whether to update the current objects.

If someone has a better proposal I'd be happy to hear about it.
If not I'll send a patch with the current changes.

  Leslie