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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Distributed data
Multiphase commit protocols
Independent actions
The heuristic rollback scenario
Results of a heuristic rollback
Situation 1: Coordinator issues a commit and all participants report heuristic rollbacks

Situation 1: Coordinator issues a commit and all participants report heuristic rollbacks

The coordinator gathers all responses from participants. If every participant reports a heuristic rollback, the following events occur as a consequence:

The coordinator writes the following message to its own database-server message log:
```
Transaction heuristically rolled back.
```
The coordinator sends a message to all participants to end the transaction.
Each participant writes an ENDTRANS record in its logical-log buffer. (The transaction entry is removed from the transaction table.)
The coordinator returns error -699 to the application, as follows:
```
-699 Transaction heuristically rolled back.
```
In this situation, all databases remain consistent.