So my use case is to be able use SQL/Query API on my existing system to retrieve from Ignite in-memory Grid. I don't expect a lot of write-through from Ignite. I DO expect most of my writes to happen on my RDBMS. I don't see any option rather than writing custom code on RDBMS(may be triggers) to capture the changes and then publish them as Events to a topic which Ignite can subscribe to. Striim provides this set of functionalities as out of the box solution for Hazelcast behind an RDBMS.
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