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MsgPack is used for data serialization with little-endian byte order.

Data Types Mapping

Ignite data types defined in IEP-54 map to MsgPack data types the following way:

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All messages, requests and responses, except handshake, start with int a 4-byte message length (excluding the length itself).

• Any MsgPack int type can be used (see varint above). Empty message will be single 0 byteMessage length is not encoded with MsgPack, 4 bytes contain raw int32 value in little-endian byte order.
• Maximum message length is 2147483647 (Integer.MAX_VALUE and maximum byte array length in Java)

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