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  • IP-SAN storage mode feature analysis

        At present, many large-scale, distributed IP video monitoring system is the use of mass storage devices such as IP-SAN, from detailed analysis of the reasons for the level of technology trends.
        Traditional IP-SAN storage system architecture, IP camera or video encoder on the acquisition of video compression coding processing, forms of IP video packets sent to the center management platform (for multi-level system of sub-center management platform) center management platform or sub-center management platform and then forwarded IP video packets to a video server, video server IP video packet processing and then sent to the IP-SAN disk array storage. Client resources to access playback video or TV wall server via the IP-SAN-video - platform - client or TV wall so that the opposite process. All video streams must be forwarded by management platform.
        As a network storage form of IP-SAN plus platform´s storage solutions compared with the previous DVR storage, on the one hand, the deployment location is relatively flexible storage capacity can be made very large, on the other hand can be realized through a distributed deployment reasonable distribution of network traffic, and improve storage reliability, but also can achieve unified management simplifies user access. Thus, IP-SAN storage monitoring field application itself is a huge step forward, and now many large industry monitoring system began in the construction or upgrading of the network using the IP-SAN ways.
        However, the IP-SAN + video server + platform architecture is not a perfect solution, it is still there are some defects, which is mainly reflected in the following:
        First, there is still room for improvement in reliability. "Video Server + management platform" in the physical form of the equipment on, some from the platform + main platform "in the form of some form of Server + main platform, for small systems, and even a device integrates the functions of the two . No matter what kind of form, the front-end video, at least to go through two network transmission process to be served IP-SAN, IP-SAN storage video to go through at least two network transmission process in order to reach the client or the TV wall decoder . This to some extent affected the reliability of the storage system. In addition, IP-SAN file system, file system functionality is provided by the video server, network failure occurs between reliability will file system repair hidden;
        Second, require a higher platform performance. Both the front-end video stored procedure, the client or TV wall access to the video data playback, the video resources to go through the video server / platform, this platform media forwarding performance requirements, and even platform performance types of waste;
        Third, there is no good distributed deployment of IP-SAN. The architecture is actually a video server bundled with the platform more dead, which led to IP-SAN is still not well distributed deployment;
        Fourth, the load balancing is not perfect. Whether it is a video server / platform corresponding to multiple IP-SAN, or multiple video servers / platforms corresponding to multiple IP-SAN, are difficult to achieve the perfect traffic load balancing, or difficult to guarantee a reasonable load balancing strategy .
        With the penetration of the CDN streaming media technology, as well as ONVIF standard gradually been adopted, and the storage architecture of the IP-SAN + video server + platform "is under the impact of a new storage model.

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