Security monitoring is just a technology

Every hot event attracted heated discussion and discussion. Everyone expressed their opinions. Afterwards, dust was returned to the dust and the new incident hit the old incident again and again. Even during the period, many people lost their independent thinking process. People turned around and people turned around. , while the individual riots from the media are irresponsible only for traffic. Xiao Bian has always insisted on this view: Technology is a means, not a panacea. Obviously, video surveillance is only a technical means. All open videos to parents can not completely solve some hot issues. Because no one can withstand the scrutiny of monitoring under the supervision of others. Teachers and chefs are the same. However, in the case of regulatory oversight and the quality of practitioners to be improved, video surveillance is fully covered and the storage is guaranteed. It is necessary and meaningful for the relevant departments to supervise and apply for surveys according to the regulations.

Kindergarten monitoring technology is not complicated by itself, but it is not as simple as those Internet companies that stood out the first time. Internet companies such as Small Ant, 360, and Lenovo came out and promised to provide tens of thousands of cameras for free. Then there was no more. Internet cameras are more suitable for families. There are no requirements for long-term storage, decoding, and display. Networking + APP is sufficient. At present, the price of an Internet camera is around RMB 150/one, and the number of 50,000 cameras is also several million. However, this is far from enough because it is only a single product and there is no storage and display part. Is cloud storage provided by internet companies reliable? Like some companies' web sites, starting toll-free or even unilaterally suspending services has caused users to suffer heavy losses and is very unreliable.

Kindergarten monitoring is a security system project, with about 50 roads per kindergarten, covering key areas such as classrooms, lunch break rooms, corridors, and outdoor activity areas. All-weather real-time monitoring is performed. All IPCs have infrared light-filling technology, which is clear even in dark environments. Imaging, video and audio can be simultaneously collected to meet the monitoring needs of kindergartens; 30 days of storage is required to ensure high reliability of video recording during power-off or restart of the system; large-screen wall monitoring is required; uploading to higher levels such as the Board of Education is required. ... The so-called advantage of the Internet camera, APP, Xiaobian that actually just is not much necessary, full-featured is very important.

Before there was a net post article (after a large area was deleted) that restarted the video surveillance system: After the restart of the video surveillance system based on TCP/IP, the IP address of each camera should be reconfigured to ensure that each channel can be cut. On the big screen, when I was managing the computer room, I had no choice but to pray silently for every reboot. I don't know what room the originator was managing at the time, what vendor equipment was used, and what motivated him. At least mainstream security monitoring equipment will not have this problem.

Whether it is a camera or a system architecture, it is clear that Internet companies are not suitable for personal home products. Cameras, fixed and all-around PTZ cameras, panoramic cameras, and night vision cameras cannot be used for 150 yuan Internet products. System architecture, NVR Although local storage, RAID protection, hierarchical management, and wall display are basic video surveillance functions, security companies are doing their job well but Internet companies are not sure. This is also an article in the past: One of the reasons why BAT cannot afford to use Haikang. Security is system engineering, solutions, and comprehensive services. It is not a single product of 2C. The following picture shows the Yushi Starlight guarding campus.

Another hot topic of discussion is the issue of data loss from power outages. Google collected information on the work of 100,000 disks in an actual system environment, summed up the average annual failure rate (AFR) of the hard disks based on hard disk usage time and load pressure, and concluded that: The annual failure rate is more than 2%, and the failure rate is proportional to the hard disk usage time and hard disk read/write pressure. The video surveillance system works 7*24 hours. The hard disk needs to continuously write a large amount of data. This workload is tens or even hundreds of times that of the personal computer hard disk. It is not difficult to explain why the monitoring hard disk is always broken.

According to Carnegie Mellon University's research results, the hard disk failure rate is usually between 2% and 4% (average level in the industry). However, the failure rate is even lower. The hard disk is still bad. If it fails, it can only be solved at the system level. RAID is the basic technology of storage. By adding redundancy check during reading and writing data, even if some hard disks are broken, data can still be accessed. The most common use in the industry is RAID5, but RAID5 can only tolerate one hard disk failure. If data reconstruction (recovering the data on the failed hard disk to an idle hard disk or storage space) is completed, another hard disk in the same RAID group fails. , there will be video data not found.

Huawei OceanStor 9000 video cloud storage adopts a new distributed RAID technology to write data and checksums to multiple devices and hard disks in distributed storage to support +1 (tolerate single disk failure, similar to RAID5). , +2 (tolerate dual-disk failure, similar to RAID6), +3, +4 and other redundant strategies. In the most extreme case, data is still available even if 4 nodes (144 hard disks) fail. At the same time, because the data is stored in multiple devices, multiple hard disks, and distributed parallel reconstruction is used during data reconstruction, the reconstruction time per TB data is less than one hour, while traditional RAID reconstruction of 1TB data takes 10 to 20 hours. The following figure shows Huawei's OceanStor 9000 fully distributed architecture and high reliability.

As a domestic high-end video surveillance solution provider, Yushi Technology is not only deep in the public security and transportation fields, but also in the "Snowing Project" and "Safe Campus" in these two years. Xiaobian went to three universities in the north in September this year. It is the camera of the Yushi Logo, just as the safe city rises frequently like the Haikang Logo. After the incident, Yushi responded quickly. As of November 30th, Yushi provided a total solution for kindergarten safety that has covered more than 400 kindergartens in Beijing.

- Deploy Yushu NVR 230 units, using original UBS block storage technology and RAID5 array, easy to use, efficient and stable storage, all aspects to protect the security of surveillance video. Combining U-Code video compression technology greatly saves storage space.

- Deploy 4200 pieces of 4T storage hard disks, centralized storage over 15PB. 7x24 work all day without interruption, data can be stored for 30 days. Massive mainstream storage hardware products, with high reliability and high security performance, can avoid the loss of important video files due to the damage of the hard disk, greatly reducing the network security risk and hard disk damage rate, but also to meet the user's needs for convenient operation.

- More than 400 kindergartens deployed Yushu front-end precision cameras totaling more than 21800, covering classrooms, lunch breaks, corridors, outdoor activity areas and other key areas for real-time monitoring throughout the day. All IPCs have infrared light-filling technology. Even in dark environments, images can be clearly imaged. Video and audio can be collected synchronously to meet kindergarten monitoring needs.

- Supporting the deployment of more than 200 large-screen monitors, monitoring videos clearly decoded on the wall, real-time display monitoring screens, guarding child safety.

Children are the focus of social concern and the future of Chinese society. Their growth video is a key data. The security and stability of video and hard disk storage are the most basic requirements for video surveillance. Yushi's hard drive is said to have a failure rate of only 0.8%. It is a very reliable provider of video surveillance products and solutions. It actively promotes the construction of a kindergarten safety environment. Yushi Precision Products and the overall program are committed to providing reliable security for young children.