Study and Implementation of Storage Management Mechanism for Transactional File System

This paper briefly introduces a transactional file system(TFS).It proposes a buffering management mechanism for assuring its high efficiency.The mechanism uses a LRU algorithm and efficient write merger strategy,which can greatly improve the data′s average write-back rate through a special merger buffer.It also proposes an external storage management mechanism for TFS consistency.The mechanism adopts a flexible write-protect strategy by state marking on external storage′s data blocks,which can ensure the write-back data can′t cover the original data and can keep data consistency when transactional point is rolling back.Testing results in embedded real-time operating system environment prove the mechanisms above can efficiently improve the performance and reliability of the transactional file system.