This concurrency control can greatly reduce timeout situations between readers and writers accessing the same data row.

这种并发性控制可以极大地减少读取程序和写入程序访问相同的数据行时产生的超时情况。

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This addresses the data race, but has further costs for concurrency, since locking the entire list while iterating could block other threads from accessing the list for a long time.

这样做虽然解决了数据争用问题，但是在并发性方面付出了更多的代价，因为在迭代期间锁住整个list会阻塞其他线程，使它们在很长一段时间内不能访问这个列表。

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Traditional relational database management systems sometimes use locking to manage concurrency, preventing clients from accessing data while another client is updating that data.

传统的关系数据库管理系统有时使用锁来管理并发性，从而防止其他客户机访问某个客户机正在更新的数据。

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