OPLOGGING FOR ONLINE RECOVERY IN DIRECT CONNECTION CLIENT SERVER SYSTEMS

摘要

Clients are permitted to directly attach to a client server system. A oplogmanagement system tracks changes as clients make the changes to controlstructures of the direct connection client server system. The Oplogging systemstores changes in oplogs. Then, if a client fails, the Oplogging system canrepair the control structures, either by undoing the changes made by theclient, or else completing the changes in place of the client; depending onprinciples defined.