Change properties and new Record Store instances

When IAS creates a new Record Store instance for a crawl, it uses all record properties as change properties. In other words, IAS evaluates all properties on a record to determine if the record is different from the previous generation's record.

If desired, you can restrict the number of properties that IAS evaluates by configuring the changePropertyNames property. This improves performance by allowing IAS to check a sub-set of record properties when determining if a record has changed. In addition, IAS can check only properties that are meaningful to the data. For example, you can set a change property to check a file version number rather than a property for fetch time or trivial information.