Resource Volume Management for Shared File System in SAN Environment

In this paper, a volume management scheme that supports multi-host environments is designed and implemented. The proposed scheme provides various features for enterprise internet services such as online resizing, online migration and an enhanced configuration scheme considering workload access patterns and disk geometry. The SANfs is a shared file system in which multiple hosts can share multiple disks via a storage area network (SAN). SANfs is designed to provide high storage I/O performance and reliability to support the internet web server, but various features of SANfs are limited by traditional storage management technology; therefore, a volume management scheme for SANfs is required. The designed volume manager in this paper, called SANfsVM, can maximize the performance of SANfs and provide SANfs with high storage volume scalability and availability. It can provide SANfs with maximum system uptime and unlimited storage capacity using online resizing management. SANfs-VM can also provide the opportunity to use the disk characteristics and access patterns of system workloads by utilizing an enhanced configuration scheme.