Network Deployment (Distributed operating systems), v8.0 > Migration and coexistence > Migrate Messaging resources > Migrate from WAS v5 embedded messaging > Migrate v5.1 messages using the message migration utility
WAS message migration utility
The message migration utility takes the contents of existing WAS v5 embedded messaging queues and puts them onto service integration bus messaging queues.
You run the message migration utility only once for a particular queue unless one of the following is true:
- The first message migration attempt was unsuccessful.
- You want to reverse the message migration (that is, move the messages back to WAS v5.1).
If you migrate a server and messages from v5.1 to a later version and then decide to reverse the migration, the reversal must be done in the following order:
- Run the message migration utility in the direction: later version to v5.1.
- Reverse the server migration.
It is possible to migrate multiple queues during a single execution of the utility.