The second change was adding another write-through Row Cache containing database records: users and tweets.
第二个改动是加入另一个直写式行缓存，它包含了数据库记录：用户和tweets。
It works by retrieving the data row information that the reader transaction needs from the DB2 logs-usually from the log's memory cache, which is very fast.
它采用的方法是从DB 2日志(常常是从非常快速的日志内存缓存)中获取读者事务需要的数据行。
When a change occurs in the table or in a specific row, the item that has a dependency is invalidated and removed from the cache.
当资料表或特定资料列发生变更时，具有相依性的项目便会失效并且自快取中移除。
Using SQL cache dependency, you could cache your product information and create a dependency on a database table or row change.
您可以使用SQL快取相依性快取产品资讯，然后在资料库资料表或资料列变更上建立相依性。
The page would then be stored in the cache until the table or row that it was dependent on changed.
然后网页就会储存在快取中，直到其相依的资料表或资料列变更为止。
The page would then be stored in the cache until the table or row that it was dependent on changed.
然后网页就会储存在快取中，直到其相依的资料表或资料列变更为止。
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