This sacrifices overall efficiency ( because of the regular interrogation of filesystems even when no user needs information ) .
Absolute accuracy ( since the database does not update in real time ) for significant speed improvements , particularly on very large filesystems .
This sacrifices overall efficiency ( because of the regular interrogation of filesystems even when no user needs information ) and absolute accuracy ( since the database does not update in real time ) for significant speed improvements , particularly on very large filesystems .