Hazelcast IMDG Standard Support has expired. Extended support for version 4.1 ends in April 2024. Extended support for version 4.2 ends in September 2024.

We recommend that you try Hazelcast Platform.

In Hazelcast Platform, we’ve combined the in-memory storage of IMDG with the stream processing power of Jet. Find out more in our Platform documentation.

The following topics are a good place to start:

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.