文件名称：Concurrency Control and Recovery
文件大小：247KB
文件格式：PDF
更新时间：2018-03-29 06:32:49
数据库论文
Introduction Many service-oriented businesses and organizations, such as banks, airlines, catalog retailers, hospitals, etc. have grown to depend on fast, reliable, and correct access to their "mission-critical" data on a constant basis. In many cases, particularly for global enterprises, 7x24 access is required; that is, the data must be available seven days a week, twenty-four hours a day. Data Base Management Systems (DBMS) are often employed to meet these stringent performance, availability, and reliability demands. As a result, two of the core functions of a DBMS are: 1) to protect the data stored in the database and 2) to provide correct and highly available access to that data in the presence of concurrent access by large and diverse user populations, and despite various software and hardware failures. The responsibility for these functions resides in the concurrency control and recovery components of the DBMS software.