Regarding video surveillance, clarity of images is undoubtedly the most crucial characteristic. The clearer the picture, the more prominent the details, the better the viewing experience, and the higher the accuracy of intelligent applications. So picture clarity is the pursuit of video surveillance. However, as high-definition videos, files ranging from a few gigabytes to tens of gigabytes are often large in size. With such large video files appearing like a tide, not only storage capacity, but also read and write functionality, reliability, and other requirements are put forward.
Characteristics of Security Monitoring and Storage Skills
The birth of network monitoring has addressed the challenges of traditional monitoring effectiveness, changed the traditional connection methods, made them simpler and more convenient, but has also given rise to infinite storage requirements and higher bandwidth satisfaction.
The storage devices selected in the video surveillance system have unique characteristics in terms of data read and write methods compared to other types of systems. Video surveillance systems usually have the characteristics of multiple monitoring points (with a large number of cameras), large video data streams, long storage times, and 24-hour continuous uninterrupted operations. The main application of video surveillance is the writing of video streams, with the following detailed features:
Video data is written to or played back from storage devices using streaming media methods, which is different from traditional file reading and writing.
Multiple videos are written to the same storage device for a long time, requiring a storage system that can operate stably for a long time.
Real time multi-channel video writing requires a storage system with high bandwidth and stability.
Unlimited capacity requirements, high demand for storage expansion functions, and the ability to replace faulty devices or expand capacity online.
When multiple concurrent reads and writes occur, there is a high demand for storage device functionality.
Inventory of monitoring and storage skills
When it comes to the application of security networking, most people think of network surveillance cameras. Originally, the composition of the surveillance system is not limited to front-end products. Without back-end storage devices, infinite picture data can only become "floating clouds". Skills related to network storage include:
1) NAS system
The network attached storage system requires file storage and access through a local area network, and also supports adding rated storage through fiber channel or SCSI switches.
2) NAS gateway
The diskless file server utilizes a SAN storage array to provide expanded storage capacity.
3) SAN architecture
Multiple servers in the network are connected to a central disk storage repository consisting of one to multiple storage arrays, greatly improving system management and data backup operations.
4) Cloud storage
A system that integrates a large number of different types of storage devices in a network through the use of software, such as cluster applications, grid skills, or distributed file systems, to jointly provide data storage and business access functions to the outside world.
5)HBA
A pluggable card that connects host computers to network/storage devices and supports multiple storage network protocols.
6) IP storage
Using the IP protocol to connect long-distance SANs, in a fiber channel SAN, the IP protocol is used to send FC frames within IP packets. For non fiber channel SANs, the SCSI protocol is used to convert SCSI data into IP packets.
7)RAID
Independent redundant disk array, requiring multiple disks to improve functionality and fault redundancy.
8) LANfree backup
When backing up data to storage arrays, tape libraries, or other storage devices, do not use LAN or WAN networks.
9) Fiber Channel
The data request is transmitted from the server to the disk array, and the fiber channel switch in the SAN is used to connect the server and storage array.
10) Block level storage
When reading/writing files from/to the disk, block level visits ensure that network users do not need to handle data, and agree with network managers to rule where data is stored to address functional issues.