A Research In IP SAN Backup Technology And Security Mechanism

At present, some technologies in data storage have been researched. From early DAS mode to current network storage mode, the data storage gradually becomes research hotspot. The traditional storage structure directly connect server and storage devices using SCSI BUS, the storage devices are as an indiscerptible segment of server, so it is a discrete storage mode. However, along with improving of distributing compute environment, data must realize share among more range, and providing high useful data for multi-user becomes the key of storage technology. Thus, network storage technology turns into main technology.Network storage technology mostly has two frames: Network Attached Storage (NAS) and Storage Area Network (SAN). NAS mode provides storage access based on file, and SAN mode realizes storage based on data block. Apparently, SAN technology is more flexible and extensible. But early SANs always realize over fibre channel (FC), the price is very costly and the technology is diffcult to prevalence in storage domain. Along with the development of TCP/IP network technology, people consider designing data storage over IP network, then IP SAN emerge as the times require. It should integrate the NAS and SAN technology.Whereas, because the IP SAN is a new domain, so some pivotal technology need farther research and solve. This paper analyses iSCSI protocol, designs and realizes an IP SAN storage system based on iSCSI. Moreover, utilizing zero-copy technology and TCP/IP prtimizing mechanism, the efficiency of iSCSI protocol is effectively advanced, and the capability of system is also improved. IP SAN storage system is vere huge research domain. This paper emphasize backup&recovery technology of IP SAN, compare many different backup technology and security mechanism, and construct a newly full+accumulative backup mode. Through actual realization, this paper realizes virtual storage using RAID technology; undependent physical disks are became consecutive logical disks, and then the performance of IP SAN backup&recovery system is improved. Furthermore, considering the security of system, this paper also analyses the security authentication mechanism of IP SAN, and brings forward an authentication model of IP SAN. Through actual realization, this paper compares the difference between SRP and CHAP authentication mechanism, solves the security issue of SCSI command/data, and can insure the integrality and consistency of data.Through lucubrating the backup&recovery and security authentication technology of IP SAN, this paper puts forward corresponding resolve projects, and applys them in actual realization. By test and analysis of the system, it is proved that the system can achieve expect goal.