RH-SCSI: A Reliable Networking Storage Protocol Of OBS

Storage systems have faced more and more challenges with the development of computer technique and networks, including higher I/O speed, larger storage capacity, security, expansibility and usability. The OBS(Object Based storage System) fits in with the next generation Internet. The OBS makes up of computer node, object-based storage device(OSD), metadata server and network. The storage network is the important factor of affecting the performance of OBS.We present a RH-SCSI(Reliable HyperSCSI) protocol, which is designed based on HyperSCSI. It can establish high-performance storage system, because it was desighed for transmitting SCSI data and it makes use of existing Ethernet infrastructure, existing hardware part. It has shown to have more stronger functions initially than iSCSI. But HyperSCSI is insufficient in reliability.To overcome the shortcoming of it, we present a RH-SCSI(Reliable HyperSCSI) protocol, which adds ECC(Error Checking and Correcting) mechanism to HyperSCSI layer. The strategy of RH-SCSI is that adding ECC mechanism to HyperSCSI layer. While the large size packet data received is error, error data could be checked and corrected. In case of little size data and command packets are error, RH-SCSI source re-transmits the error packets based on acknowle-dgement policy. These mechanism raises the throughput of the storage network, lightens the burden of the network. The performance of RH-SCSI is analyzed, and the simulation results on NS-2 show that the presented protocol is efficient.