Kepler

Currently the workflow check the last archiving time through a local database.
If the workflow run on different machine, it will cause conflict. If we search the metadata (EML) documents in the repository and get the last archiving time by pass them, the process will be more robust. However, cost is high.

If this workflow only be run by a scheduler and execution engine (this means the workflow will be run on one machine), checking the last archiving time through the local DB will be fine.