An adaptive hybrid server architecture for client caching ODBMSs

Current client-server object database management systems employ either a page server or an object server architecture. Both of these architectures have their respective strengths, but they also have key drawbacks for important system and workload configurations. We propose a new hybrid server architecture which combines the best features of both page server and object server architectures while avoiding their problems. The new archi-tecture incorporates new or adapted versions of data transfer, recovery, and cache consistency al-gorithms; in this paper we focus only on the data transfer and recovery issues. The data transfer mechanism allows the hybrid server to dynami-cally behave as both page and object server. The performance comparison of the hybrid server with object and page servers indicates that the perfor-mance of the hybrid server is more robust than the others.