A comparison of computed chaining to predictors

Computed chaining and predictors are two recent techniques for resolving hashing collisions which use a pseudolink field instead of an actual address link to group records which map to the same home address. With additional computation on the pseudolink, the actual address can be determined. The advantage of the pseudolink is that it often takes much less storage than an actual address would take. The authors note problems with the predictor method which must be overcome if the method is to be used successfully. They also compare the predictor method to computed chaining. They conclude with a discussion of the utility of multiple predictor, i.e. having more than one chain of pseudolinks for records with the same home address.