After the video surveillance products have experienced the development of the analog era, the digital era, and the cyber era, they have gradually entered the era of high-definition video. "We see more clearly" is no longer a concept, but the emergence of high-definition products can greatly enhance the application value of video surveillance systems, and bring more room for development for the video surveillance industry.
Compared with traditional analog cameras, network cameras are characterized by high efficiency, openness, and intelligence. In particular, network cameras can overcome the paralysis of image clarity by traditional CCTV systems and achieve higher resolution and higher quality HD surveillance. In order to meet the demand for high-definition surveillance, the back-end HD platform storage system also plays a vital role.
The HD platform storage system mainly completes the storage, backup, and management of image data. The storage service should adopt the combination of distributed storage and centralized storage; it should select storage devices with appropriate storage, storage bandwidth, and response time according to application requirements; and formulate corresponding backup policies according to the importance of data.
For the characteristics of video surveillance, centralized storage of video surveillance requires a perfect network environment to ensure the transmission of monitoring data. Currently, three types of video surveillance planning schemes are commonly used:
Centralized monitoring storage system Centralized monitoring storage system Centralized monitoring data storage and unified management over the network. Centralized storage of monitoring data within a large area (eg, city, district, branch, etc.) can involve hundreds or even thousands of Camera monitoring data. The centralized monitoring storage system solution has the following features:
1, due to the use of a centralized architecture for easy management and maintenance;
2, the overall cost of the system is low, the system is easy to expand, and the floor space is small;
3. Large one-time investment, but lower total cost compared to pure disk solutions;
4. The requirements for network bandwidth are high, and system resources can be fully utilized.
Distributed monitoring storage system Distributed monitoring storage system Centralized monitoring data storage and unified management over the network. Centralized storage of monitoring data in a relatively small area (eg, units, units, etc.) can involve tens to hundreds of cameras. Monitoring data. The characteristics of distributed solutions are:
1. The investment of each information aggregation point is low, but under the condition of supporting the same number of monitoring heads, the overall investment is higher than that of centralized solutions;
2. It is not convenient for centralized monitoring and management, and system maintenance costs are high;
3. The demand for network bandwidth is low, and the resource utilization may be uneven due to the different conditions of the aggregation points.
Centralized and distributed hybrid monitoring system Storage solutions The centralized monitoring system is easy to manage. The distributed monitoring system facilitates the playback and query of video data. Both methods have their own advantages and disadvantages. Therefore, in some large-scale monitoring systems, more and more solutions are available. The choice will be centralized and distributed for unified deployment, which not only facilitates management, but also facilitates the playback and query of data, and also reduces the pressure on the bandwidth.
For the above different storage system application types, different hardware platforms are required to be matched so that a large amount of image information can be quickly and conveniently stored and transmitted. At the same time, the hardware system platform can be smoothly and seamlessly completed during the upgrade process in different stages of development. In view of the limited network bandwidth resources, the bandwidth required for monitoring data is relatively large. Therefore, it is unrealistic to use network transmission to realize centralized storage of data, and the cost of adopting optical fiber transmission is higher. Therefore, the current general monitoring and construction model is Decentralized storage, centralized management.
The selection of the center equipment of the HD platform storage system needs to fully consider the function of the product to meet the increasingly rich user demands and the performance to meet the maintenance needs of long-time high-load operation. The main points of its function and performance are as follows:
Feature points 1) High-definition video display 2) Various customizable recording storage mechanisms 3) Extensive peripheral expansion capabilities 4) User UI is easy to use Performance points 1) Embedded system design is adopted.
2) Support RAID 0/1/5, data fault tolerance, and enhance data storage reliability.
3) Support disk hot swap.
4) Provide dual Gigabit Ethernet ports, adaptive network environment, support for network backup redundancy and load balancing.
5) Complete information security mechanism Construction of high-definition monitoring storage system 1) Calculation of storage capacity Single-channel 7 2 P Capacity required for data storage one day = 3 M bps (code rate average) × 60 × 60 × 24 × 1 ( Day) ÷ 8 (bit to Byte) = 0.03T storage space;
2) Common storage options: DAS, NAS, IP-SAN
At present, the storage methods commonly used in security systems include DAS direct connection, NAS network hard disk, and IPSAN. With its low cost, simple configuration, mature transmission scheme, and RAID array technology, DAS is widely applicable to small-scale network monitoring systems for centralized recording. The IP-SAN adopts the IP architecture of the Ethernet transmission and storage network. It has good scalability, sharing, and high security. It is one of the major technologies currently adopted for large and medium-sized centralized monitoring and storage. The NAS network attached storage solution, with the advantages of moderate price and convenient implementation, can easily realize distributed network storage and make up for the gap between the former two storage solutions. It is suitable for medium-sized network monitoring projects.
3) Method to reduce storage space:
a: Reduce the video frame rate: the cost is the image fluency decline;
b: alarm triggered recording: video of non-alarm time can not be obtained;
c: Use schedule video.
Taking a large-scale video surveillance storage project in a safe city as an example, there are more than 5,500 monitoring points of Class I monitoring, 20,000 monitoring points of Class II, and 225,000 monitoring points of Class III, exceeding the construction level of domestic first-tier cities. A class of monitoring probes are used to cover the out-of-city crossings, cross-river bridges, tunnels, key intersections, and key parts of the main city, forming a backbone video surveillance network, which is directly controlled by government departments. Among them, there are 2200 high-definition cameras for monitoring points, and 3Mbps for high-definition streams; there are 3,300 monitoring points for D1 cameras and 1.5Mbps for D1 streams; all types of monitoring points have a storage time of up to 30 days. Such a large-scale video surveillance system in safe cities puts higher requirements on the storage capacity, scalability, and cluster management performance of the monitoring center's storage system.
Centralized and distributed storage modes are used to uniformly deploy the front-end HD network video recording files. The centralized monitoring system facilitates management. The distributed monitoring system facilitates playback and query of video data. This storage mode not only facilitates management, but also facilitates management. It also reduces the pressure on bandwidth.
In the topology architecture, the video resources of the second and third types of monitoring points are centralized and stored in HDM video matrix host HDM at the sub-regional level platform, and the video resources of all types of monitoring points are uploaded to the municipal platform for centralized storage. All IPSAN2016 storage devices of municipal platforms are centrally installed in the command building of the Municipal Public Security Bureau, providing a total storage capacity of 5,000 TB; it fully meets the requirements of this safe city video surveillance system for mass storage capacity and scalability, and the layout of the project can be fully utilized. IPSAN2016's outstanding fleet management features greatly reduce maintenance costs and failure response time for large-scale monitoring centers.
Compared with traditional analog cameras, network cameras are characterized by high efficiency, openness, and intelligence. In particular, network cameras can overcome the paralysis of image clarity by traditional CCTV systems and achieve higher resolution and higher quality HD surveillance. In order to meet the demand for high-definition surveillance, the back-end HD platform storage system also plays a vital role.
The HD platform storage system mainly completes the storage, backup, and management of image data. The storage service should adopt the combination of distributed storage and centralized storage; it should select storage devices with appropriate storage, storage bandwidth, and response time according to application requirements; and formulate corresponding backup policies according to the importance of data.
For the characteristics of video surveillance, centralized storage of video surveillance requires a perfect network environment to ensure the transmission of monitoring data. Currently, three types of video surveillance planning schemes are commonly used:
Centralized monitoring storage system Centralized monitoring storage system Centralized monitoring data storage and unified management over the network. Centralized storage of monitoring data within a large area (eg, city, district, branch, etc.) can involve hundreds or even thousands of Camera monitoring data. The centralized monitoring storage system solution has the following features:
1, due to the use of a centralized architecture for easy management and maintenance;
2, the overall cost of the system is low, the system is easy to expand, and the floor space is small;
3. Large one-time investment, but lower total cost compared to pure disk solutions;
4. The requirements for network bandwidth are high, and system resources can be fully utilized.
Distributed monitoring storage system Distributed monitoring storage system Centralized monitoring data storage and unified management over the network. Centralized storage of monitoring data in a relatively small area (eg, units, units, etc.) can involve tens to hundreds of cameras. Monitoring data. The characteristics of distributed solutions are:
1. The investment of each information aggregation point is low, but under the condition of supporting the same number of monitoring heads, the overall investment is higher than that of centralized solutions;
2. It is not convenient for centralized monitoring and management, and system maintenance costs are high;
3. The demand for network bandwidth is low, and the resource utilization may be uneven due to the different conditions of the aggregation points.
Centralized and distributed hybrid monitoring system Storage solutions The centralized monitoring system is easy to manage. The distributed monitoring system facilitates the playback and query of video data. Both methods have their own advantages and disadvantages. Therefore, in some large-scale monitoring systems, more and more solutions are available. The choice will be centralized and distributed for unified deployment, which not only facilitates management, but also facilitates the playback and query of data, and also reduces the pressure on the bandwidth.
For the above different storage system application types, different hardware platforms are required to be matched so that a large amount of image information can be quickly and conveniently stored and transmitted. At the same time, the hardware system platform can be smoothly and seamlessly completed during the upgrade process in different stages of development. In view of the limited network bandwidth resources, the bandwidth required for monitoring data is relatively large. Therefore, it is unrealistic to use network transmission to realize centralized storage of data, and the cost of adopting optical fiber transmission is higher. Therefore, the current general monitoring and construction model is Decentralized storage, centralized management.
The selection of the center equipment of the HD platform storage system needs to fully consider the function of the product to meet the increasingly rich user demands and the performance to meet the maintenance needs of long-time high-load operation. The main points of its function and performance are as follows:
Feature points 1) High-definition video display 2) Various customizable recording storage mechanisms 3) Extensive peripheral expansion capabilities 4) User UI is easy to use Performance points 1) Embedded system design is adopted.
2) Support RAID 0/1/5, data fault tolerance, and enhance data storage reliability.
3) Support disk hot swap.
4) Provide dual Gigabit Ethernet ports, adaptive network environment, support for network backup redundancy and load balancing.
5) Complete information security mechanism Construction of high-definition monitoring storage system 1) Calculation of storage capacity Single-channel 7 2 P Capacity required for data storage one day = 3 M bps (code rate average) × 60 × 60 × 24 × 1 ( Day) ÷ 8 (bit to Byte) = 0.03T storage space;
2) Common storage options: DAS, NAS, IP-SAN
At present, the storage methods commonly used in security systems include DAS direct connection, NAS network hard disk, and IPSAN. With its low cost, simple configuration, mature transmission scheme, and RAID array technology, DAS is widely applicable to small-scale network monitoring systems for centralized recording. The IP-SAN adopts the IP architecture of the Ethernet transmission and storage network. It has good scalability, sharing, and high security. It is one of the major technologies currently adopted for large and medium-sized centralized monitoring and storage. The NAS network attached storage solution, with the advantages of moderate price and convenient implementation, can easily realize distributed network storage and make up for the gap between the former two storage solutions. It is suitable for medium-sized network monitoring projects.
3) Method to reduce storage space:
a: Reduce the video frame rate: the cost is the image fluency decline;
b: alarm triggered recording: video of non-alarm time can not be obtained;
c: Use schedule video.
Taking a large-scale video surveillance storage project in a safe city as an example, there are more than 5,500 monitoring points of Class I monitoring, 20,000 monitoring points of Class II, and 225,000 monitoring points of Class III, exceeding the construction level of domestic first-tier cities. A class of monitoring probes are used to cover the out-of-city crossings, cross-river bridges, tunnels, key intersections, and key parts of the main city, forming a backbone video surveillance network, which is directly controlled by government departments. Among them, there are 2200 high-definition cameras for monitoring points, and 3Mbps for high-definition streams; there are 3,300 monitoring points for D1 cameras and 1.5Mbps for D1 streams; all types of monitoring points have a storage time of up to 30 days. Such a large-scale video surveillance system in safe cities puts higher requirements on the storage capacity, scalability, and cluster management performance of the monitoring center's storage system.
Centralized and distributed storage modes are used to uniformly deploy the front-end HD network video recording files. The centralized monitoring system facilitates management. The distributed monitoring system facilitates playback and query of video data. This storage mode not only facilitates management, but also facilitates management. It also reduces the pressure on bandwidth.
In the topology architecture, the video resources of the second and third types of monitoring points are centralized and stored in HDM video matrix host HDM at the sub-regional level platform, and the video resources of all types of monitoring points are uploaded to the municipal platform for centralized storage. All IPSAN2016 storage devices of municipal platforms are centrally installed in the command building of the Municipal Public Security Bureau, providing a total storage capacity of 5,000 TB; it fully meets the requirements of this safe city video surveillance system for mass storage capacity and scalability, and the layout of the project can be fully utilized. IPSAN2016's outstanding fleet management features greatly reduce maintenance costs and failure response time for large-scale monitoring centers.
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