A new conflict relation for concurrency control and recovery in object-based databases
Sangkeun Lee, Soonyoung Jung, Chong‐Sun Hwang · 1996
This paper proposes preservation as a new conflict relation in an object-based database.By explicitly including reverse-operations which bridge the gap between concurrency control and recovery, preservation can be used independently of execution contexts to which different recovery algorithms and/or object models give rise, and further it forms a basis for formulating semantics-based recovery.This paper also makes a t wo-dimensional( i.e., execution cent exts and operations' specifications) comparison bet ween preservation and other conflict relations.Irr each execution cent ext, our formal comparison reveala that preservationbased concurrency control achieves more concurrency than commutativity-based one.