Design and performance evaluation of an adaptive parity cache technique

This research proposes adaptive parity cache technique on cache to solve "small write problem" of RAID 5 especially in OLTP environments. This configuration provides a cache management method that adds information on the read/write characteristics of the file when a user process in RAID 5 makes a request to kernel for a file. This information is used for management of disk cache by reading the parity. Especially on write request, this method reduces additional access problems compared to conventional methods by using write related information of the file system to store data and parity together in a cache. Therefore, we can enhance the cache utilization and improve the disk request response time. Our method is analyzed through a mathematical method. Comparing with previous works, we observed performance enhancement.