A Performance Evaluation of Log-Only Temporal Object Database Systems K. Nørvåg   View Paper (PDF)   Return to SHORT PAPERS Abstract An alternative to in-place updating of data is to eliminate the database, and use a log-only approach. The log is written contiguously to the disk, in a no-overwrite way, in large blocks. The log-only approach is particularly interesting for transaction time object database systems (TODB), because keeping previous versions of objects is a feature that comes free. One of the objections against log-only databases has been that the read cost will be prohibitively high because of loss of clustering. However, in our comparison of the performance of log-only and in-place update TODBs, the analysis shows that with the workload we expect to be typical for future TODBs, the log-only approach is highly competitive with the traditional in-place update approach. Proceedings of the 12th International Conference on Scientific and Statistical Database Management (SSDBM'00) DiSC'01 Copyright ©2002 ACM Inc.