An Endeca index can be recovered by reverting to a particular baseline/delta or partial update. To do so, restart the MDEX Engine on the index files that were backed up after a particular baseline/delta and roll forward using any partial update files accrued since that baseline/delta.
To revert to a previously applied update:
1. Stop the MDEX Engine
2. Clean up the active dgraph_input directories
3. In the backup directory, locate the files from the last successful update. This is the dgidx_output directory backup on the ITL server.
4. Copy the files into dgraph_input
5. If partial updates need to be applied, see instructions below on “Applying partial updates between last baseline/delta or snapshot and present”. Otherwise, restart the MDEX Engine.
Applying partial updates between last baseline/delta and present:
1. In the backup directory for partial update XML files (the cumulative_partials backup directory), locate the files representing the updates that occurred since the update you are reverting to.
2. Copy all backed-up partial update XML configuration files from all partial updates that occurred since the update to which you want to revert into the dgraph_input/updates directory on the MDEX server.
3. Restart the MDEX Engine. Upon restarting, the Engine will load the current index and then apply all updates loaded into its updates directory.
