Video Datastorag Policies: An Access Frequency Based Approach

Video applications are characterized by their increased requirements for hug storag spaces andtiming synchronization. Video data storag is a critical issue due to the so-called I/O bottleneck problem in relation to the quality of service while accessing video applications. The main contribution of the paper is that it considers video data dependencies, access frequencies andtiming constraints in order to introduce a video data representation model whichg ides the storag policies. Two video data representation levels are considered to capture the frequencies of accesses at external (video objects) and internal (video clips) levels. A simulation model has been developed in order to evaluate the placement strateg2C-- Video data placement is performed on a tertiary storag subsystem by both constructive and iterative improvement policies. Iterative improvement placement has been proven to outperform the other video data placement approaches