Dongguan Surveillance Engineering Company With the increasing definition of video images, the storage requirements of video images are also constantly changing. In the security video surveillance industry, there are currently three main storage methods: front-end distributed storage, back-end centralized storage, and cloud storage.
First, front-end distributed storage With the continuous advancement of IP video surveillance by Dongguan Surveillance Engineering Company, the original analog video surveillance and analog-digital mixed network video surveillance application mode is gradually being purely IP-based and full HD network video. Monitoring said to replace. Therefore, front-end distributed storage products are gradually replaced by DVR and HDVR (hybrid DVR) with NVR products. The use of NVR products for front-end distributed storage mainly consists of three types of application scenarios: one is that the user's networking requirements are a WAN link environment and the link bandwidth is very low; the other is focused on the system networking cost, hoping to use low-cost construction Program. The third type is that the entire system has fewer video surveillance points and the network size is small.
The technological maturity of NVR products is already very high, so the market competition environment is quite fierce. Manufacturers at home and abroad continue to introduce high-performance, low-cost NVR products, making the front-end distributed storage system networking costs continue to decrease. At the same time, with the introduction of 4K and H.265 technologies, front-end NVR storage products have made great progress in terms of further improvement of video image clarity, changes in encoding methods, and reduction of storage space requirements, making the front-end NVR storage products more competitive. . In addition, NVR products are widely used by customers at many different levels due to their easy-to-use features.
Second, the back-end centralized storage With the continuous development of IP network technology, the video surveillance system of Dongguan Surveillance Engineering Company has begun to evolve from a small-scale multi-point system to a large-scale video surveillance system, which in turn has promoted a centralized video surveillance storage Evolution. Compared with NVR's distributed storage, the back-end centralized storage method pays more attention to centralized data storage, data reliability, and unified management and maintenance, and has a better capacity expansion capability. Therefore, the back-end centralized storage method is more suitable for large-scale deployment. Centralized storage is mainly represented by SAN / NAS. Among them, SAN is widely used because of its high performance and high stability. SAN is mainly divided into FCSAN and IPSAN by product form and protocol. FCSAN products have low latency and high reliability, but the construction cost is also much higher. It is not very suitable for the large-capacity storage requirements of video surveillance. IPSAN products have high interconnectivity, simple management and maintenance, and relatively low construction costs. Low cost and other advantages are widely used in the security video surveillance industry.
The methods used by IPSAN as a storage device in the field of security video surveillance of Dongguan Surveillance Engineering Company are actually different. Many security video surveillance platform manufacturers use the standard iSCSI protocol to mount IPSAN devices to streaming media dump servers as standard disks, providing large-capacity disk space. In this application mode, all video writes must go through the streaming media dump server, which easily forms a single point of failure and performance bottleneck. As the number of video surveillance channels continues to increase, the number of streaming media dump servers will have to be increased, which will increase the overall construction cost and increase the difficulty of system management and maintenance. In addition, the characteristics of the security video surveillance system determines that the video image data is periodically overwritten and deleted. The use of a universal file system will inevitably cause a large number of file fragments, resulting in continuous decline in storage performance over time.
In the Dongguan monitoring engineering company market, IPSAN's market competition environment is also not optimistic: first, as market competition becomes more intense, price wars are inevitable. Many manufacturers continue to reduce the production cost of IPSAN products, and their reliability and stability have some problems. In addition, in order to participate in market competition, there are many cases of video access performance and specifications that are false. As a result, customers cannot reach the claimed number of access channels in actual use, or problems such as image frame loss and video loss after full specification access.
Third, cloud storage is currently undergoing rapid development in the direction of massive, ultra-high-definition, intelligent, and integrated applications. In recent years, the number of security video surveillance cameras in various industries has been increasing. The construction of a university ’s safe campus ranges from 1,000 to 3,000 cameras. For a safe city in a medium-sized city, the number of cameras may exceed 10,000. The storage capacity of 1000 channels of 1080P video images has reached 1 PB, and the security video surveillance storage has entered the storage P era. Due to the independence of multiple storage devices and the lack of effective data integration and collaborative processing capabilities, some additional problems have been brought about: the unified management of storage devices, and the inability to share and utilize device performance and storage space. Therefore, on-demand cloud storage technology can solve the above problems. Cloud storage uses clustering, virtualization, distributed file system and other technologies to unify the device resources, bandwidth resources, storage space resources, etc. in the entire system to provide users with large-capacity, high-performance, highly reliable transparent storage services .
Cloud storage, as an emerging storage technology, has just begun to be recognized by everyone and gradually applied to the security video surveillance industry. In cloud storage technology, solutions from different manufacturers are also different. Based on their understanding of the business, security vendors have introduced security-specific cloud storage, and data storage vendors have pushed general-purpose cloud storage to meet the diverse needs of users. Although cloud storage technology is hot, there are also many problems due to its recent rise:
First, there is no unified standard for cloud storage technology. All manufacturers are promoting their products according to their own understanding and based on different business needs. It will still take time for the cloud storage technology to perfectly fit the security video surveillance business.
Second, when cloud storage products are just in the ascendant, they have fallen into a price war, which has adverse factors for the development of cloud storage technology.
Third, the data security of frequency cloud storage needs to be further improved, especially for public security video surveillance for public consumption access to public cloud storage. Privacy and confidentiality should be strictly monitored.