Whether to use the file size of a document to identify if it has been changed or not since it was last indexed (also see IgnoreLastModifiedDate).
Declaration Syntax| C# | Visual Basic | Visual C++ |
public bool UseFileSizeToIdentifyChange { get; set; }
Public Property UseFileSizeToIdentifyChange As Boolean
public: property bool UseFileSizeToIdentifyChange { bool get (); void set (bool value); }
Remarks
Ideally the last-modified date of a document would always be used to identify if it has changed (see IgnoreLastModifiedDate property), however web-servers do not always
return this information. Further, dynamic pages do not have 'last-modified' dates, since they are dynamic.
The byte size of a document can however be used to identify change with reasonable accuracy. If a document has a different file size, then it has definitely changed. Of course, it is also possible for a document to change, but have the same size (exactly the same number of letters are deleted as added, for example), so this is not 100% accurate.
Despite not having 100% accuracy, it may be desirable to forgo accuracy for performance, by setting this to true.