Security HD monitoring storage technology has come to an end
In general, the following monitoring technologies currently exist in the following storage technologies.
1, DVR storage. DVR storage is currently the most common storage mode. The codec device directly connects the hard disk. Currently, up to 8 hard disks are available. However, due to the limitation of the performance of the encoding and decoding equipment, the hard disk sequential writing mode is generally used, and RAID redundancy technology is not used to implement data protection. With the ever-increasing hard disk capacity, the chance of a single-disk failure leading to the loss of critical data is increasing at the same time, and the limitations of DVR performance also affect the sharing and analysis of image data.
2. The encoder external storage device is directly connected to the storage. Connected via the external memory interface of the codec, it mainly uses storage protocol extensions such as SATA, USB, iSCSI, and NAS. In this way, the re-expansion of the codec capacity can be achieved, which is suitable for small-to-medium-scale deployments. Monitoring video data is assured in terms of reliability through RAID technology. Among them, the direct connection method adopted by the SATA/USB mode cannot be shared and has low expansion capability. IP network (iSCSI and NAS) modes have better scalability and sharing capabilities. Due to the direct writing of data, the number of server relays is reduced, and the user's investment is saved while the performance is improved. However, in this method, the data is forwarded and retrieved, and it is easy to cause a great bottleneck in forwarding. Currently, direct writes usually use storage methods such as NAS. Due to the NAS' own file protocol and other reasons, it is not efficient to write data concurrently in multiple nodes.
3, centralized management of storage. The server connects to the front-end codec, downloads the data through the streaming media protocol, and stores it on the storage device. Servers and storage devices can be connected through SAS, iSCSI, NAS, and FC protocols. The centralized storage method is suitable for the deployment of large and medium-sized platforms. Among the centralized storage methods, the IP connectivity mode (iSCSI) and the FC connection mode have good scalability and manageability, and are currently one of the most widely adopted methods. In terms of actual deployment and effect, FC storage is more suitable in a node-rich monitoring environment due to its powerful performance and data processing capabilities. IP storage can be more suitable for small and medium-sized applications due to limitations in performance and scalability. High cost performance.
4, NVR storage. In the video surveillance system, NVR is an ideal upgrade product for analog video recorders and hard disk video recorders. It is a stand-alone operation device that is based on the original DVR and eliminates the window operating system and the computer. Because NVR adopts highly integrated chip technology, it has advanced digital video recording, storage and playback functions, no need to replace and store video tapes, no computer coordination and routine maintenance, so it can achieve high resolution (full-D1 resolution can be achieved). Rate), high quality real-time monitoring, and easy to use. In simple terms, the NVR system digitizes traditional video, audio, and control signals, and transmits them on the network in the form of IP packets through the network interface on the NVR device. On the basis of the DVR, the system is networked.
With so many kinds of storage solutions, which one is more suitable for the needs of high-definition monitoring, it is necessary to go deeper to understand the specific needs of the project's high-definition storage. We will discuss the advantages and disadvantages of NVR storage and centralized management storage solutions as examples.
In practical applications, although the NVR system has the advantages of computer's fast processing capability, digital information anti-jamming capability, convenient quick query recording, clear video images, and multiple images displayed on a single machine. However, in essence, NVR does not solve the problem of analog transmission in the DVR system, nor does it solve the more management problems caused by the network transmission of the video stream. In fact, each NVR forms an independent monitoring center, which brings greater complexity to the implementation of full network monitoring. In areas such as remote control, multi-level scalability, and networking capabilities, it is a technical difficulty to be solved in the future.
In terms of centralized management of storage, it is clear that NVR is suitable for large-scale monitoring systems, and through a powerful management platform to deal with the entire system for centralized management, regulation and storage.
This is also a technical difficulty. How to apply a powerful platform management software requires the harmonization of coding methods of related equipment, as well as optimization of broadband transmission, data processing capabilities, and storage buffering. In the implementation process, the large-capacity storage hard disks and bandwidth costs required for large data traffic are quite large. How to balance costs and effects and how to meet specific requirements will be a direct problem. Therefore, for these network transmissions, the cost of bandwidth setup, and the difficulty or bottleneck of large-capacity storage hard disks will be an inevitable factor in high-definition monitoring storage.
1, DVR storage. DVR storage is currently the most common storage mode. The codec device directly connects the hard disk. Currently, up to 8 hard disks are available. However, due to the limitation of the performance of the encoding and decoding equipment, the hard disk sequential writing mode is generally used, and RAID redundancy technology is not used to implement data protection. With the ever-increasing hard disk capacity, the chance of a single-disk failure leading to the loss of critical data is increasing at the same time, and the limitations of DVR performance also affect the sharing and analysis of image data.
2. The encoder external storage device is directly connected to the storage. Connected via the external memory interface of the codec, it mainly uses storage protocol extensions such as SATA, USB, iSCSI, and NAS. In this way, the re-expansion of the codec capacity can be achieved, which is suitable for small-to-medium-scale deployments. Monitoring video data is assured in terms of reliability through RAID technology. Among them, the direct connection method adopted by the SATA/USB mode cannot be shared and has low expansion capability. IP network (iSCSI and NAS) modes have better scalability and sharing capabilities. Due to the direct writing of data, the number of server relays is reduced, and the user's investment is saved while the performance is improved. However, in this method, the data is forwarded and retrieved, and it is easy to cause a great bottleneck in forwarding. Currently, direct writes usually use storage methods such as NAS. Due to the NAS' own file protocol and other reasons, it is not efficient to write data concurrently in multiple nodes.
3, centralized management of storage. The server connects to the front-end codec, downloads the data through the streaming media protocol, and stores it on the storage device. Servers and storage devices can be connected through SAS, iSCSI, NAS, and FC protocols. The centralized storage method is suitable for the deployment of large and medium-sized platforms. Among the centralized storage methods, the IP connectivity mode (iSCSI) and the FC connection mode have good scalability and manageability, and are currently one of the most widely adopted methods. In terms of actual deployment and effect, FC storage is more suitable in a node-rich monitoring environment due to its powerful performance and data processing capabilities. IP storage can be more suitable for small and medium-sized applications due to limitations in performance and scalability. High cost performance.
4, NVR storage. In the video surveillance system, NVR is an ideal upgrade product for analog video recorders and hard disk video recorders. It is a stand-alone operation device that is based on the original DVR and eliminates the window operating system and the computer. Because NVR adopts highly integrated chip technology, it has advanced digital video recording, storage and playback functions, no need to replace and store video tapes, no computer coordination and routine maintenance, so it can achieve high resolution (full-D1 resolution can be achieved). Rate), high quality real-time monitoring, and easy to use. In simple terms, the NVR system digitizes traditional video, audio, and control signals, and transmits them on the network in the form of IP packets through the network interface on the NVR device. On the basis of the DVR, the system is networked.
With so many kinds of storage solutions, which one is more suitable for the needs of high-definition monitoring, it is necessary to go deeper to understand the specific needs of the project's high-definition storage. We will discuss the advantages and disadvantages of NVR storage and centralized management storage solutions as examples.
In practical applications, although the NVR system has the advantages of computer's fast processing capability, digital information anti-jamming capability, convenient quick query recording, clear video images, and multiple images displayed on a single machine. However, in essence, NVR does not solve the problem of analog transmission in the DVR system, nor does it solve the more management problems caused by the network transmission of the video stream. In fact, each NVR forms an independent monitoring center, which brings greater complexity to the implementation of full network monitoring. In areas such as remote control, multi-level scalability, and networking capabilities, it is a technical difficulty to be solved in the future.
In terms of centralized management of storage, it is clear that NVR is suitable for large-scale monitoring systems, and through a powerful management platform to deal with the entire system for centralized management, regulation and storage.
This is also a technical difficulty. How to apply a powerful platform management software requires the harmonization of coding methods of related equipment, as well as optimization of broadband transmission, data processing capabilities, and storage buffering. In the implementation process, the large-capacity storage hard disks and bandwidth costs required for large data traffic are quite large. How to balance costs and effects and how to meet specific requirements will be a direct problem. Therefore, for these network transmissions, the cost of bandwidth setup, and the difficulty or bottleneck of large-capacity storage hard disks will be an inevitable factor in high-definition monitoring storage.