Locking is the mechanism that the database manager USES to control concurrent access to data in the database by multiple applications.
锁定是数据库管理器用来控制多个应用程序并发访问数据库中数据的机制。
Efficient management of concurrent access (of service requests to the target) is determined by the performance characteristic of the target database server.
并发访问的有效管理(对目标的服务请求)由目标数据库服务器的性能特性决定。
This provides concurrent access by multiple threads to the human tasks in the database as shown in Figure 2.
这提供了多线程并发访问数据库中的人工任务，如图2所示。
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