Backup server using direct I/O scheme

Recently the study of network backup server has developed rapidly and its achievements have become a center of attraction. In this paper we focus on I/O subsystem performance analysis for network backup server. The key issue is to analyse the trade-off between direct I/O and buffered I/O mechanism. We investigate how the two mechanisms affect overall performance of network backup server. We designed and implemented the backup server and conducted several experiments. Experimental result shows overall performance of direct I/O method outperforms traditional buffered I/O mechanism.