An Incremental Update Propagation Scheme for a Cooperative Transaction Model

Engineeringdesign applications require the support of long transactions in cooperative environments, The problem of the existing copy/update/merge approaches is that thepartial effects of a committed transaction may be not part of the merged version. Thispaper introduces a new cooperativetransaction model, which allows updates to be progressively notified or propagated into other transactions accessing the same object. To support incremental updatepropagation and notification, we use the term dynamic dependency to define the intertransaction dependency relationships among all the objects checked out from the public database. Consistency in multiple copies of the same object is achieved by a two-phase delta-merge protocol. Our model provides a synchronizationof cooperative updates performed in several workspaces without using locking mechanisms.

• Type: Conference
• Year: 1996
• Where: DEXAW
• Authors: Am-suk Oh, Jin-oh Choi, Bonghee Hong
• Keywords: Database, DEXAW 1996, Intertransaction Dependency Relationships, Synchronizationof Cooperative Updates, Term Dynamic Dependency