Demand in the Storage Market Increases HD Storage as a Development Trend

As we all know, HD as the overall trend of future video surveillance development needs the cooperation and support of all aspects. For the important link storage in the surveillance system, the application of high-definition surveillance also puts forward new requirements for its development: First, high-definition monitoring brings higher transmission bandwidth load and greater storage capacity to the system; secondly, "High-definition monitoring" often means a higher level of monitoring, and the reliability of data storage is also higher? ? These new developments have put new demands on monitoring storage products and technologies.

Key factors for achieving high-definition storage In order to better achieve high-definition monitoring, storage technologies need to be matched in terms of capacity, performance, application response, and structural adaptation.

First, the storage products need more capacity and higher performance in the face of higher data transmission bandwidth and greater storage capacity requirements for HD surveillance. More importantly, when meeting these requirements, storage technology needs to be more closely integrated with surveillance applications, especially high-definition surveillance applications. In this regard, only products and solutions designed for specific applications can better meet the requirements.

Second, high-definition surveillance systems often use high-definition network cameras as monitoring point video capture devices. Such devices often do not carry long-lasting storage media. The data storage process transfers data over the network and then on other specialized storage devices. Realize the storage of data.

Third, while high-definition surveillance brings higher definition quality, it comes with the increase of coded stream and the same storage time, but the pressure of storing data increases. This requires that the storage device can efficiently and completely implement secure writing of video data based on the characteristics of high-definition monitoring code streams.

Finally, high-definition storage will change the characteristics of the past monitoring system data and the local storage of the encoding device, and the data will be concentrated in one or more locations to achieve storage. In this way, how to quickly retrieve and retrieve the required historical videos in the centralized mass data is also a new challenge.

In addition, systems that use high-definition encoded input typically use high-definition network cameras or domes, and the system presents an easily scalable modular architecture. For this feature of the front end, it also requires that the back-end storage scheme needs to have more flexibility to adapt to the expansion requirements of the entire system.

The specific solutions for high-definition storage requirements correspond to the characteristics of high-definition monitoring data volume, higher storage reliability requirements, and more flexible system architecture. The issues that need to be solved in high-definition storage become more clear: In high-definition monitoring systems, storage devices and subsystems Must have an effective and complete recording function; consider the reliability and security of the stored data from the media and system perspective; to the flexible structure of the system, to achieve unified management and scheduling of storage resources, to configure flexibility The video recording plan can meet the requirements for extending the recording time of the system and monitoring the expansion of the front end at any time according to changes in demand.

In overcoming these problems, we are not more concerned with the choice of storage media, but based on the existing online storage media disk, to design different storage products, so as to meet the storage needs of different high-definition monitoring systems in multiple dimensions:

To achieve large-capacity storage, you can design multiple hard disk slots, compatible with large-capacity hard disk products, and provide a large amount of storage space through the expansion of external array cabinets.

For high-reliability storage requirements, RAID protection technology can be used at the device level. For example, RAID5 can support the redundancy of a hard disk, and RAID6 can support the redundancy of two hard disks.

The device adopts a dual-controller architecture and uses the redundancy of physical hardware and heartbeat communication on the communications to ensure the reliability of storage services. At the system level, the N+1 device online redundancy mode and the video management server dual-system hot backup mode can be adopted.

In the system architecture, for the characteristics of the monitoring system, we recommend the use of distributed network storage solutions to reduce system transmission pressure. Different storage subsystems should also be adopted for high-definition monitoring systems of different sizes and different structures. For example, for systems that have been retrofitted in the old system and partially implemented in high definition, hybrid DVRs can be used to implement high-definition video access and storage, which not only protects the original analog-standard definition video access, but also adds "high-definition" highlights to the system.