Optimization method for I/O of IND storage system based on replica mechanism
Guohua Wang · Shenyang Gongye Daxue xuebao · 2012
To solve the problem that the performance of I/O components for IND storage system is hard to be improved,a novel replica mechanism was designed through analyzing the I/O request process.The programmable NIC was used to store the the replica of read-only high-frequency accessing hot data in the replica space of NIC.A replica metadata table was established in the memory of IND units to guide the management of IND units to the replica space.The online DCA was designed to ensure the timeliness of replica data in NIC space.In the requst process,the replica data would not be transferred by bus.When the data packet reached the INC buffer zone,the replica data would be filled in the corresponding positions and then sent out,which could reduce the flow of the bus and further enhance the throughput of the system as well as improve the performance of the existing devices.The experimental results show that the proposed method can reduce the flow of the IND bus by above 30%,increase the throughput of the system by above 40%,improve the performane of the system obviously,and possesses the better theoretical and practical values.