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We’ve combined the in-memory storage of IMDG with the stream processing power of Jet to bring you an all new Hazelcast platform.

SQL on Data Structures Backed by High-Density Memory Store

If you configure the IMap data structure to use High-Density Memory Store, you have to create at least one global High-Density Memory Store index to run an SQL statement. This limitation comes from the fact that off-heap IMap data structure is not thread-safe, and we use thread-safe concurrent indexes based on the B+ Tree implementation to run IMaps scan operators.