Research Of Structure And Volume Allocation Strategy In Network Storage Based On InfiniBand

With the rapid data growth and fast storage capacity expansion in the network environment, I/O performance of the storage system becomes the key indicators to evaluate a storage system. Since InfiniBand is high bandwidth, low latency, it's widely used in the network of high-performance computing nodes. If the network is expanded to storage systems, on the one hand, I/O performance of the storage system can be conspicuously improved, on the other hand, facilitately unites the network of computing nodes and storage network, providing a great convenience for the management of cluster systems. Based on it, this paper mainly researches network storage system archtecture of infiniband and volume allocation strategy. The content of researches:In aspect of network storage system architecture, based on SCSI RDMA Protocal, maps infiniband architecture to SCSI architecture, summarizes the I/O path of the infiniband storage network. Using queue pair, core bypassing technology and Remote Direct Memory Access technology, designes a target simulator of storage system based on infiniband. Experments show that the I/O bandwidth through infiniband network connection is much higher than that through Fibre Channel or Gigabit Ethernet, even five times the I/O bandwidth of accessing the local disk. Further reaches the conclusion that I/O bandwidth utilization of target is constrained by the bandwidth of raid. And then proposes combinating of RAID cards and concurrently accessing the target to increase the assembed bandwidth of accessing back-end disks. In aspect of logical volume authorization, realizes logic resource authorization and masking, through interrelated mapping between port Globally Unique Identifier(GUID) and logical volume. Test verifies its high security and flexibility to access authorization.In aspect of data sharing in storage area system, a management program of centralized controlling the storage sharing datas in IB-SAN is gaven. It utilizes a metadata server to realize storage sharing management, expands network through infiniband, improves system performance through a third party for transmission and software RAID. A strategy of dynamically establishing the disk map is prosed to provide the virtual view of physical storage devices for the node servers. Tests indicate that storage sharing management ensures the synchronization of storage resources, supportes the online increase and decrease of volumes, cross-platform, simple interface, and easy expansion.