Cost Analysis of Serpentine Tape Data Placement Techniques in Support of Continuous Media Display
Ali E. Dashti, Cyrus Shahabi, Roger Zimmermann, Ali E. Dashti · 2015
. Due to the information explosion we are witnessing, a growing number of applications store, maintain, and retrieve large volumes of continuous media (CM) data, where the data is required to be available online or near-online. These data repositories are implemented using hierarchical storage structures (HSS). One of the components of HSS is tertiary storage, which provides a cost-eective storage for the vast amount of data manipulated by these applications. However, it is crucial that the 3-4 orders of magnitude dierence in access time between the tertiary storage and the secondary storage be bridged to allow online or near-online access to the tertiary resident data. This wide accessgap is mainly due to: the sequential nature of the most popular tertiary technologies (i.e., tapes) and the low number of drives per media in tertiary storage juke boxes. In this paper, we investigate the performance and cost eectiveness of three data placement techniques for serpentine ...