关键词: 内存数据网格（IMDG）, 分布式事务, 两阶段提交协议（2PC）

Abstract: Online transaction processing (OLTP) Web applications face the continuous growth of concurrent users and data size. The high concurrent read and write operations make databases become the bottleneck. In-memory data grid (IMDG) is a new distributed data access platform based on memory, and an effective technical approach to eliminate the bottleneck of write operation in the database. However data distribution involved in data access operation of IMDG is unpredictable. A distributed transaction guarantee mechanism is necessary. For the IMDG system characteristics, this paper gives a distributed transaction guarantee mechanism, designs and implements a distributed transaction processing model, the way to do request processing and data accessing and the transaction guarantee protocol, and normalizes the application programming interface (API) between clients and servers. The experimental results on TPC-W show that the mechanism can improve the OTLP speed and support good scalability.

Key words: in-memory data grid (IMDG), distributed transaction, two-phase commit protocol (2PC)