Incorporation of Application Specific Information for Recovery in Database from Malicious Transactions

摘要

For maintaining the consistency of database, the recovery algorithms traditionally depend on complete rollback to a consistent checkpoint. The recovery problem from committed malicious transactions can be solved by determining the dependencies between the transactions in window of vulnerability. Since the size of transactional log may grow very large, recovery becomes a complex and time-consuming process. In this paper, we propose an approach which incorporates application specific information to determine transactional dependencies. The approach is applied to column based transaction dependency to obtain better performance. The system is implemented at application layer where SQL queries are generated. In recovery phase, we consider only affected and malicious transactions for rollback and skip the good transactions.