A Media File Snapshot Technique Based on Embedded System

Abstract

File system reliability has always been a strong concern in the embedded operating system. This reliability frequently involves a choice between raw performance and integrity guarantees. Snapshot technique is to create an instant image of the file system with little processing and space overheads. It performs data protection and provides the continuous data service during backup. To improve the reliability and stability of the embedded file system, we propose an embedded file system meta-data snapshot for the ext2 file system, which based on the asynchronous/synchronous I/O coexisted strategy of media file storage, in muCLinux kernel 2.4.26. As we all know, embedded systems usually have very strict memory, processor, and I/O limitations that must play factors in designing an embedded system. Moreover, the cost of additional system management complexity and disk latency are the key factors that directly affect the file system performance. Because of these limits, we introduce a media storage file system (MSFS). The main technique of this File system is MSnap (meta-date virtual view snapshot technique). Unlike other snapshot technologies; it dose not needs massive snapshot volume and complexity implementation. Experimental results show that MSnap induces less overhead and has higher performance, reliability than traditional snapshot system.