这些按照顺序的元数据更新(被称为“同步”元数据更新)同样有将所有以前还没更新到磁盘上的元数据都刷新的效果。
These in-order metadata updates, called "synchronous" metadata updates, also had the effect of flushing all previous pending metadata updates to disk.
它可以迅速更新表单数据，让人感觉应用程序是立即完成的，表单没有提交或刷新而用户得到了新数据。
It can update form fields on the fly, giving that immediate feeling to your application — users are getting new data without their form being submitted or refreshed.
例如，您可以使用每个缓存项的最长生命周期和过期时间来为需要更新数据的特定用户刷新缓存数据。
For example, you could use the maximum life and expiration time for each cached item to refresh cached data for specific users that need updated data.
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