关键词: 分布式，短事务，提交协议，日志备份

Abstract: Transactions in distributed short transaction system are usually short and asked frectuently. Most of the exiting distributed commit protocols arc designed for the complex long transaction system, therefore they can not meet the needs of short transactions. In this paper, an improved schema for distributed short transaction systems was proposed.By backuping logs and querying among participants, we can efficiently reduce the number of log-written, communicadons during the transaction and optimizing the failure processing. Compared with other distributed commit protocols and systems,this protocol can effectively improve the efficiency of services,and has a very high log availability.

Key words: Distributc,Short transaction,Commit protocol,Log backup