Research On Acceleration Technology Of I/O Based On IP-SAN

The rapid growth of information resources puts forward a higher demand to the storage capacity, data availability and I/O performance, and so on. Storage products are no longer auxiliary equipment that is attached to server, and become the main equipment of the Internet. Network Storage Technology experienced three stages: they are DAS, NAS and SAN, among which IP-SAN has more and more attracted people's attention by lutilizing the advantages of the maturity and universal of the existing IP network. But existing storage systems failed to keep pace with the demand of enterprise in such aspects as expansiveness, high I/O performance and high-quality services. Therefore, it is essential to strengthen the research of the performance of IP-SAN storage network, effectively make use of the established network conditions and enhance the I/O throughput of IP network storage systems.IP-SAN storage system I/O path involving multiple copies of data links, the paper led from the I/O performance bottleneck analysis of the factors may start to the IP-SAN storage systems and order flow data flow from the I/O Acceleration Methods. Use of TCP/IP protocol offload technology and bypass the RDMA core technology, designed to accelerate the method of DCS system structure, working methods and DCS in the process of achieving the main part of the methods and data structure. Then, based on the RAID0 and RAID5 technology portfolios, the establishment of a multi-I/O channel parallel acceleration model, designed a number of sub-array adapter cards and multiple disk points of the two parallel data organization and distribution methods, in order to improve the I/O to the complicated. Cache design based on the descriptors control block chain to find the hash algorithm and the frequency of visits based on the Cache page count of second chance replacement algorithm, and a host of data reception and IP-SAN storage device with a pre-reading strategy.Finally, storage management server CPU consumption rate and the I/O performance indicators for the test, compared with the experimental methods were tested to accelerate the technical performance, test results showed that the paper put the technology to speed up the IP-SAN storage system I/O performance Very significant results.By using the CPU performance and I/O performance of storage management server as testing index, this Paper finally tests the performance of the above-mentioned two kinds of acceleration technology with the experimental methods of comparison. Test results show that the two kinds of acceleration technology have a very significant effect on the I/O performance of IP-SAN storage systems.