Jae-Hoon An
ABSTRACT
The Linux-based legacy server systems are configured and used with software RAID to improve the performance of the disk I/O. However, the problem is that the current Linux kernel and software RAID are difficult to optimize the high-performance block I/O because it is designed to be optimized for low-speed devices. Therefore, we propose the efficient method using recombination and re-mapping techniques to improve the performance of Block I/O Accelerator based software RAID level-0 provided on the Linux kernel level. This proposed method is designed to have more bandwidth at a time by reducing the number of system calls considering the block I/O characteristics of Linux kernel and RAID level 0. As a low-level I/O benchmarking tool, XDD is used to evaluate the performance of the proposed method. According to the experimental results, our performance gains are 15.24% on write bandwidth and 14.87% on read bandwidth compared with legacy software RAID 0.
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