Three storage methods
Distributed storage centralized management
For a large-scale urban network monitoring system, a multi-level monitoring center system is usually adopted. Each grassroots monitoring center manages and stores monitoring resources within its jurisdiction, so it will be constructed using a distributed storage centralized management model. This model helps to reduce the pressure on the network, while sinking resources helps the actual combat department to grasp more resources.
The first-level monitoring center manages all video resources and video files in a unified manner.
Centralized storage and distributed management
For small and medium-sized network monitoring systems with only one centralized management center, such as county / prefecture-level cities, a public security branch of a large city, and a large industrial and mining enterprise, data is generally stored in the first-level monitoring center, and other grassroots monitoring centers install system platforms. Separate control client to browse and manage part of the front end. In this case, the storage server is centrally placed in the first-level monitoring center. Through virtual volume and grid storage technology, a storage pool with unlimited capacity is formed to make storage expansion transparent to users.
Hybrid storage
Combining the previous two methods, using distributed storage as the basis, and setting up a network storage server in the primary monitoring center. Short-term data is temporarily stored in the network storage server of the grassroots monitoring center, and long-term data is stored in the network storage server of the primary monitoring center. The video data of important monitoring sites are not only stored in the network storage server of the primary monitoring center, but also transmitted to the network storage server of the primary monitoring center in real time as a backup. Establish a backup plan in the grass-roots monitoring center, using regular automatic backup to back up video files over 30 days to the corresponding directory of the network storage server.
Mass storage solutions
Generally speaking, there are many monitoring points for urban road traffic monitoring, and the data to be stored include monitoring video, illegal photos, and the management system data of the road monitoring command center. The storage management server in the command center can accept 100 to 150 video streams according to the level of hardware configuration, so the command center is equipped with multiple storage management servers. If the DAS (Direct Attached) disk array is used, the space utilization rate will be relatively low, and the storage system upgrade and expansion capacity is relatively poor, so it is recommended that users use the SAN architecture.
This solution mainly solves the problems of large-capacity storage of road traffic monitoring systems, data security of surveillance videos and photos, and expansion of storage systems through the use of professional storage systems, and can also address the data security requirements of different monitoring points , Customize different levels of secure storage space, thereby saving storage space.
1. Large capacity storage, easy to expand
If you use digital hard disk recorders and servers to store surveillance videos, you can provide up to 10TB of storage space. Especially after the hard disk recorder and the hard disk installed in the server exceed a certain number, the entire device will become unstable due to heat dissipation.
Using professional storage equipment DC-4000 disk array, a single set of equipment can not only provide up to 50TB of storage space, the entire SAN system can also provide hundreds or even thousands of TB of storage space.
2. Realize safe storage
Professional storage equipment can provide a higher level of security protection for surveillance video. For example, RAID6 can damage two hard drives without losing data, and the system can still be used normally.
The Roaming function can pull out the hard disk from the failed device and insert it into the same series of devices, but the data on the hard disk will not be lost. In addition, the unique heat dissipation design can ensure the safe operation of the system in various environments.
3. Choose a device with a higher degree of intelligence
What is the Roaming function? For example, I have 2TB of data on five 500GB hard drives as a group of RAID. If there is a problem with the device, you can unplug the five hard drives and insert them into any device in the same series. As above, these data can still be read and written.
This function maximizes the protection of the user's data security, and is particularly useful for users who purchase multiple devices of the same brand.
Virtual volume technology was originally a technology used in high-end storage products. Due to the practicability and flexibility of virtual volume technology, it can better meet the storage needs of customers with a variety of applications, so it is increasingly used in low-end storage products. If the customer has more than three types of data, different levels of security protection are required, and the size and transmission speed of the unit data are also different. At this time, the ordinary disk array is difficult to meet the user's storage needs, and the array using virtual volume technology is Can meet application needs.
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