Optimistic Locking

Instead, we recommend the use of an optimistic locking strategy, delegating responsibility for concurrency control to appropriate application logic.

我们建议采用乐观锁定策略，将并发控制的责任委派给相应的应用程序逻辑。

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Note that without DDL changes, optimistic locking applications may get more false negatives than with DDL changes.

注意，在不进行DDL修改的情况下，乐观锁定应用程序可能会产生更多的漏判（false negative）。

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This represents a simplified form of what the database world calls optimistic locking.

这是数据库调用乐观（optimistic）锁的简单方式。

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Optimistic locking, where a record is locked only when changes are committed to the database.

乐观的锁定，只当数据库发生更改时锁定记录。

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While not enforced, optimistic locking is highly recommended in flow-managed persistence.

尽管不是强制实施的，但是强烈建议在流管理的持久化中使用乐观锁。

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In a multi-tiered system, you often use optimistic locking with detached objects to increase system concurrency and achieve high performance.

在多层系统中，经常可以在分离对象上使用乐观锁来提升系统并发性，达到更高的性能。

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There are other possible optimistic locking strategies and detailed design work is needed to devise suitable concurrency schemes.

另外，还需要一些其他可能的乐观锁定策略和详细设计，以制定合适的并发方案。

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Applications using this programming model will benefit from the enhanced optimistic locking feature.

使用这种编程模型的应用程序将从增强的乐观锁定特性中获益。

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The Optimistic Locking Algorithm Based on Relative Position and Its Application in Collaborative Editing Systems

相对位置乐观锁机制及在协同编辑中的应用

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Read-Committed is the minimum level required for optimistic locking to work.

Read-Committed是乐观锁工作所需的最低级别。

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In this case, there may need to be some application restructuring, or optimistic locking may need to be used instead.

这时，可能需要修改应用程序，或使用乐观锁定方式。

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Such a column is need for optimistic locking to implement long conversion ( application transaction).

乐观锁需要这个字段来实现长对话（应用程序事务）[译注：session译为会话，conversion译为对话，以示区别]。

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Optimistic locking is an extremely efficient concurrency control method that guarantees data integrity without placing any physical lock in the database.

乐观锁是一个极其有效的并发性控制方法，它可以确保数据完整性而又无需在数据库中放置任何物理锁。

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If the workload is a read mostly workload, then solutions like caching with optimistic locking work well.

如果工作负荷主要是读取，那么诸如使用最优锁定进行缓存的解决方案可以很有效。

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Note that applications that do not use this programming model are not considered optimistic locking applications, and they will continue to work as before.

注意，未使用这种编程模型的应用程序被认为是非乐观锁定应用程序，它们将按照以前的方式工作。

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Optimistic locking is still highly recommended for non-atomic Web flows to protect the data integrity of each user action.

对于非原子Web流还是强烈推荐使用乐观锁来保护每个用户操作的数据完整性。

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For instance, if the application uses pessimistic locking, don't change the application during the migration to use optimistic locking.

例如，如果应用程序使用悲观锁定，则在迁移过程中不要将应用程序更改为使用乐观锁定。

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The Concurrency Controlling Algorithm of Optimistic Locking Based on Relative Position in Real-Time Distributed Cooperative Editing System

基于相对位置的分布式实时协同编辑乐观锁并发控制算法

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Due to the obvious concurrency requirement, you would first enable optimistic locking on entity classes.

由于明显的并发性需求，您应该首先在实体类上启用乐观锁。

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Speaking of Locking, Pratik said that JPA specification defaults to optimistic locking.

谈到锁（locking），Pratik说到JPA规范默认使用乐观锁（optimistic locking）。

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