[ Pacific Security Network News ] At present, with the rapid development of the security industry, video surveillance is also constantly developing, from analog monitoring to digital monitoring, to all-IP digital monitoring, video surveillance applications have been developed for nearly 20 years, Stepping into the all-digital network era, that is, the third generation of remote video surveillance. From a storage perspective, the devices used are gradually transitioning from traditional hard disk recorders (DVRs) to iSCSI disk arrays. Why are iSCSI-based storage solutions favored by users in the video surveillance industry? 80% use IP storage <br> In the traditional video surveillance field, such as buildings and other monitoring points are very centralized monitoring storage system, users still accustomed to adopt DVR mode. The DVR mode is ideal for local monitoring and monitoring of high dot density, with low investment and good support for local storage devices. The disadvantage is that the network function is weak and the scalability is poor. Liu Hong, Institute of Data Security, Institute of Information Technology, Tsinghua University, said: "Today, most customers need to monitor a lot of points and are scattered, usually more than 32 channels. The amount of digital video generated every day is large, and the time required for video recording often exceeds For a month or more, the hard disk of the DVR can not meet the needs of large capacity and high stability. The large-scale monitoring system like Safe City not only guarantees the capacity and reliability of the storage system, but also It is deployed in the WAN to realize centralized storage and management of data, so that the originally closed systems can be interconnected. The IP-based storage solution can solve the above problems. In the Ping An City project, 80% use IP storage solutions.
DVS+IPSAN to be improved <br> Although most of the Safe City projects have chosen IP storage solutions, is a common IPSAN storage solution available for use, and will definitely achieve the best results? Liu Hong said: "In order to meet the user's needs for storage performance, functionality and stability, while considering the cost, customized storage solutions are the future trend."
From the past, foreign manufacturers are mainly pushing high-end products, and the cost per TB of their products is usually higher than the cost of domestic manufacturers. For video surveillance applications, the price is very important, and the low-end and mid-range storage devices are sufficient, so domestic manufacturers that promote low-end products have certain advantages. In early 2007, Vision Data released a simple, flexible, and cost-effective MacroStorDEA series of disk arrays that were optimized for the performance, functionality, and management and expansion needs of video surveillance systems.
From a practical point of view, many users who choose IPSAN storage solutions adopt the architecture of Digital Video Server (DVS) + IPSAN, but this architecture is prone to performance bottlenecks. For example, the number of front-end monitoring points carried by a single server is limited. Generally, when it is carried to 70~90, the server will have a bottleneck. At present, many new monitoring projects often reach hundreds or even tens of thousands of points. Users have to purchase a large number of servers, which increases the procurement cost and increases the system management cost.
DVS+IPSAN to be improved <br> In order to solve this problem, Granville Data is working on the development of a new generation of storage devices dedicated to video surveillance - monitoring storage devices with direct write capabilities. The device directly acquires the video digital signal from the DVS, then performs unpacking, and stores the video signal, and establishes a third-party video information index. Through a server, all IPSAN indexes can be aggregated, a summary table can be established, and external access and query services can be provided, which can not only solve the server bottleneck problem, but also solve the problem that the DVSs of the manufacturers cannot be compatible with each other.
The difference between video applications and ordinary IT applications is obvious. Ordinary IT applications are mainly bursty data. The data traffic is large and small, the drop is very large, and it is not sensitive to delay. It mainly requires instantaneous high bandwidth. For example, in the application of the database, whether it is FCSAN or IPSAN, as long as the data can be written at the fastest speed. In this case, performance is determined by bandwidth.
Video applications are completely different. Video streaming is a typical continuous data stream. For a long period of time, the data traffic remains basically the same, cannot be greatly jittered, and is very sensitive to delays, but does not require too high bandwidth. General-purpose storage devices are developed for general IT applications. The ability to support video streaming is weak, high bandwidth is mostly wasted, and the number of supported video streams is very limited. With a universal storage device, when the number of concurrent video streams increases, even if the bandwidth usage is low, video obstruction often occurs.
The biggest difference between a customized video storage device and a general-purpose storage device is that it can optimize and manage the video stream, ensure the stability of the video stream with the largest system resources, and try to ensure continuous transmission, instead of transmitting the maximum amount of data in an instant. Customized storage devices can support more concurrent video streams. The customized video storage device has the function of monitoring and managing the video stream, and the hardware configuration can be optimized for the characteristics of the video stream, and the general storage device can only see the system bandwidth usage. In terms of performance, a general-purpose IPSAN can only support 200 channels of video streaming, while an IPSAN optimized for video applications can support 300 channels of video streams and more. Intransa's new BB6000 video series storage products are custom IPSAN products for video surveillance applications with a maximum capacity of over 400TB, a maximum performance of 880MB/s, and a powerful graphical interface.
DVS+IPSAN to be improved <br> Although most of the Safe City projects have chosen IP storage solutions, is a common IPSAN storage solution available for use, and will definitely achieve the best results? Liu Hong said: "In order to meet the user's needs for storage performance, functionality and stability, while considering the cost, customized storage solutions are the future trend."
From the past, foreign manufacturers are mainly pushing high-end products, and the cost per TB of their products is usually higher than the cost of domestic manufacturers. For video surveillance applications, the price is very important, and the low-end and mid-range storage devices are sufficient, so domestic manufacturers that promote low-end products have certain advantages. In early 2007, Vision Data released a simple, flexible, and cost-effective MacroStorDEA series of disk arrays that were optimized for the performance, functionality, and management and expansion needs of video surveillance systems.
From a practical point of view, many users who choose IPSAN storage solutions adopt the architecture of Digital Video Server (DVS) + IPSAN, but this architecture is prone to performance bottlenecks. For example, the number of front-end monitoring points carried by a single server is limited. Generally, when it is carried to 70~90, the server will have a bottleneck. At present, many new monitoring projects often reach hundreds or even tens of thousands of points. Users have to purchase a large number of servers, which increases the procurement cost and increases the system management cost.
DVS+IPSAN to be improved <br> In order to solve this problem, Granville Data is working on the development of a new generation of storage devices dedicated to video surveillance - monitoring storage devices with direct write capabilities. The device directly acquires the video digital signal from the DVS, then performs unpacking, and stores the video signal, and establishes a third-party video information index. Through a server, all IPSAN indexes can be aggregated, a summary table can be established, and external access and query services can be provided, which can not only solve the server bottleneck problem, but also solve the problem that the DVSs of the manufacturers cannot be compatible with each other.
The difference between video applications and ordinary IT applications is obvious. Ordinary IT applications are mainly bursty data. The data traffic is large and small, the drop is very large, and it is not sensitive to delay. It mainly requires instantaneous high bandwidth. For example, in the application of the database, whether it is FCSAN or IPSAN, as long as the data can be written at the fastest speed. In this case, performance is determined by bandwidth.
Video applications are completely different. Video streaming is a typical continuous data stream. For a long period of time, the data traffic remains basically the same, cannot be greatly jittered, and is very sensitive to delays, but does not require too high bandwidth. General-purpose storage devices are developed for general IT applications. The ability to support video streaming is weak, high bandwidth is mostly wasted, and the number of supported video streams is very limited. With a universal storage device, when the number of concurrent video streams increases, even if the bandwidth usage is low, video obstruction often occurs.
The biggest difference between a customized video storage device and a general-purpose storage device is that it can optimize and manage the video stream, ensure the stability of the video stream with the largest system resources, and try to ensure continuous transmission, instead of transmitting the maximum amount of data in an instant. Customized storage devices can support more concurrent video streams. The customized video storage device has the function of monitoring and managing the video stream, and the hardware configuration can be optimized for the characteristics of the video stream, and the general storage device can only see the system bandwidth usage. In terms of performance, a general-purpose IPSAN can only support 200 channels of video streaming, while an IPSAN optimized for video applications can support 300 channels of video streams and more. Intransa's new BB6000 video series storage products are custom IPSAN products for video surveillance applications with a maximum capacity of over 400TB, a maximum performance of 880MB/s, and a powerful graphical interface.
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