RAPID-Cache - a reliable and inexpensive write cache for disk I/O systems

Document Type

Conference Proceeding

Date of Original Version



The redundant, asymmetrically parallel, and inexpensive disk (RAPID) cache, consists of two redundant write buffers on top of a disk system, is presented. The RAPID cache presents an asymmetric architecture with a fast-write-fast-read RAM and a fast-write-slow-read NVRAM. The asymmetric cache allows cost effective designs for very large write caches for high end disk I/O systems that would otherwise have to use dual copy, costly NVRAM caches. The analysis and trace driven simulation results indicate that the RAPID-cache has significant reliability and cost advantage over dual copy caches.

Publication Title

IEEE High-Performance Computer Architecture Symposium Proceedings