Multiple Micro Virtual Disks Based on NaryRAID for Large Scale Storage

Abstract

If we do not use only idle resources of servers but also those of clients, we can reduce the cost of private cloud. In the previous works, we proposed VLSD(Virtual Large Scale Disks) as a toolkit for constructing large scale storage such as private cloud. VLSD provides several RAID classes. Using VLSD, we developed complex software RAID named Single Large Virtual Disk (SLVD). However, since it has a centralized file server, it becomes the single point of failure and the bottle neck. In this paper, we propose a novel Multiple Micro Virtual Disks (MMVD) in order to avoid such issues. In addition, we apply NaryRAID, 3 fault tolerant RAID to MMVD. NaryRAID based MMVD achieves higher reliability than RAID6 based one.