Design and implement of remote CD mirror system based on third-party transferring

摘要

CD mirror system can separate the reading from storing of CD information, enabling user to share CD resource with higher speed. Existing remote CD mirror system is generally based on NAS mode. NAS-based device accesses the data at file level and the data must pass through the file system layer, increasing the system burden; iSCSI system encapsulates SCSI commands over IP, which just corresponds with the transport mechanism of remote CD mirror system. Therefore, in this paper we have implemented a new remote CD mirror system by introducing iSCSI protocol and third-party transferring mode. With third-party transferring mode data information and control information are transferred independently, the data information is transferred by iSCSI protocol, and control information is transferred by TCP/IP protocol, so as to increase the network transfer rate. The result of experiment has showed that the CD mirror system can achieve higher data transfer rate and support more concurrent sessions relative to existing systems, and have better scalability using third-party transferring mode.