Migration process3
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The document outlines the process for adding a secondary server to an existing Prodco JMS server. It involves: 1) configuring the new server as an active member of a fault-tolerant pair with the existing server, connected to shared storage; 2) migrating half the consumers and then the producers to the new server; 3) allowing the existing server to empty of data; 4) migrating the remaining consumers; and 5) turning off the old server so the new server is running normally with producers and consumers.
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Migration process3
- 1. Migration process: How to add a secondary server to a running Prodco JMS server TheLem ns.c m Prodco
- 2. Producers Consumers The present JMS server JMS1
- 3. Producers Consumers Why this procedure works JMS1 All messages are held in JMS queues on a fast internal disk In general you can’t add a fault tolerant partner to a running server, but in this case all messages are held in JMS queues
- 4. Producers Consumers Why this procedure works JMS1 Every consumer has at least one load sharing partner. Each queue of messages has at least two consumers.
- 5. Add new JMS server JMS1 Producers Consumers JMS2 Configure as Active member of a fault tolerant pair of JMS servers The new JMS server is connected to SAN shared storage
- 6. Add new JMS server JMS1 Producers Consumers JMS2 Configure as Active member of a fault tolerant pair of JMS servers The new JMS server is connected to SAN shared storage Shared storage device
- 7. Add new secondary JMS server Producers Consumers JMS2 Configure a new server instance running on the same machine as the original JMS server JMS1 JMS2b
- 8. Migrate half the consumers Producers Consumers Move some of the consumers to the new server Consumers JMS2 JMS1 JMS2b
- 9. Migrate half the consumers Producers Consumers Consumers JMS2 Consumers are reconfigured so that JMS2 is their primary server and JMS2b is secondary Move some of the consumers to the new server JMS1 JMS2b
- 10. Migrate the producers ProducersConsumers All producers are now connected to the fault tolerant pair Consumers JMS1 JMS2b JMS2
- 11. Allow the server to empty of data ProducersConsumers Consumers JMS2b JMS1 JMS2
- 12. Migrate the remaining consumers Producers Move the remaining consumers to the new server All consumers are now connected to the fault tolerant pair Consumers JMS1 JMS2b JMS2
- 13. Turn the old server off Producers Consumers JMS1 JMS2b JMS2