PERFORMANCE AND DESIGN EVALUATION OF THE RAID-II STORAGE SERVER

RAID-II is a high-bandwidth, network-attached storage server designed and implemented at the University of California at Berkeley. In this p aper, we measure the performance of RAID-11 and evaluate various archi tectural decisions made during the design process. We first measure th e end-to-end performance of the system to be approximately 20 MB/s for both disk array reads and writes. We then perform a bottleneck analys is by examining the performance of each individual subsystem and concl ude that the disk subsystem limits performance. By adding a custom int erconnect board with a high-speed memory and bus system and parity eng ine, we are able to achieve a performance speedup of 8 to 15 over a co mparative system using only off-the-shelf hardware.