Overview of deploying and managing query applications
Typically, query application deployments script the start up and management of all Apama query application components outside of the Apama development environment in Software AG Designer. Apama recommends the use of the following to aid in this:
the Ant export facility of
Software AG Designer, or
Command Central Queries can also be run from Software AG Designer. However, Software AG Designer can run only a single correlator deployment. To deploy multiple correlator deployments, use either Apama macros for Ant or Command Central.
Queries can be deployed on a single node, but typically would be deployed across multiple nodes, forming a cluster. While involving more components, a cluster provides:
Scale out across multiple hosts
Resiliency against failures
Continued availability if some nodes fail
Using a cluster will involve the following:
Some number of correlators that are executing queries
A BigMemory distributed cache for storing event history
A JMS bus for distributing events to correlators
Queries use the store name "ApamaQueriesStore". If you want to use BigMemory, you need to configure the BigMemory driver to use that as the store name, else an in-process only memory store will be used. See
Configuring BigMemory driver.