当应用程序有一个单独的功能需要访问或更新多个事务资源中的数据时，应该使用分布式事务。

Whenever an application has a single function that needs to access or update the data in multiple transactional resources, it should use a distributed transaction.

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这不但使对分布式站点数据更新变得更为容易，而且当服务器变得不可用时为数据存储提供了备份。

This not only makes it far easier to keep distributed sites up-to-date, but provides a backup repository in the event a server becomes unavailable.

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本文介绍如何设置内存中数据网格，然后以分布式和并行方式跨网格执行计算和数据更新。

This article shows you how to set up an in-memory grid of data, and then perform computation and data updates in a distributed and parallel manner across the grid.

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