language: en

Schema Evolution in Object Databases: Measuring the Performance of Immediate and Deferred Updates

Fabrizio Ferrandina Thorsten Meyer Roberto Zicari
Johann Wolfgang Goethe-Universitat Frankfurt Fachbereich Informatik (20) Datenbanken und Informationssysteme (DBIS)
Robert-Mayer-Str. 11-15 D-60325 Frankfurt am Main, Germany
{ferrandi,meyer,zicari}@dbis.informatik.uni-frankfurt.de

Abstract When the schema of an object database system is modified, the database needs to be changed in such a way that the schema and the database remain consistent with each other. This paper uses the OO1 benchmark [2], appropriately modified, to compare the two most used approaches for transforming the database, namely the immediate and the deferred database transformation [4].

1 Immediate vs. Lazy Database Updates