Storage technology in the field of monitoring diverse characteristics of the market – storage, monitoring – Security Industry
With the Digital Security Technology Popularity, security Market Non-standard features are stored in the control area determines the diversity of features, generally speaking, there is currently monitoring the following storage technology market:
DVR Storage DVR storage is the most common type of storage mode, the codec device directly mounted hard drive, now with up to eight hard drives. However, since encoding and decoding equipment performance limits, generally use the hard drive in order to write the model, there is no application of RAID redundancy techniques to implement data protection. With the continuous increase of hard disk capacity, single hard drive failure resulting in the risk of critical data loss in the synchronized growth, and DVR performance limitations also affected the image data sharing and analysis. This approach is characterized by: cheap, easy to use, by Remote control , And the keyboard can operate; DVR method is suitable for small-scale, distributed deployment. Domestic DVR Product For example Haikang, UOB's products are already very mature.
Encoder Direct Attached Storage Codec plug-in storage devices, through the codec to connect external memory interface, mainly SATA, USB, iSCSI and NAS storage protocols such as extensions. This approach allows the re-codec capacity expansion for small and medium-scale deployment of surveillance video data reliability through RAID technology to a certain guarantee. One SATA / USB mode connected with the direct approach, not less able to share and expand the current application is gradually phased out; IP network (iSCSI and NAS) mode has better scalability and sharing capabilities. Such as the wave of a series of networked storage products and a number of major manufacturers can encode video data devices directly written to reduce the server transfer this part of the upgrade in performance and also save the user's investment, but this way because need to rely on streaming media server, forwarding and retrieval of data, easy to forward this link in the streaming media bottlenecks, and currently direct writing method commonly used NAS storage, due to its own file protocol NAS and other reasons, resulting in a multi-node concurrent write when efficiency is not high.
Centralized storage Front-end server connectivity codec download data by streaming media protocols, and then stored in the storage device. Between servers and storage devices through SAS, iSCSI, NAS, FC protocol. Centralized storage mode for the deployment of medium and large platform. Stored in centralized, IP connection mode (iSCSI) and FC connection mode with good scalability and manageability, is one way of using more. The actual terms of the deployment and effectiveness, FC storage as a strong performance and data processing capability, more control nodes Environment In more appropriate; and IP storage performance and scalability due restrictions, small applications can have a higher cost.
NVR storage
In Video Surveillance System, NVR is the analog video recorders and hard disk recorders ideal upgrade product, is based on the original DVR exemptions Windows operating system and computer equipment with a single independent operation. As the NVR to highly integrated chip technology, advanced digital video, storage and playback, without replacement, and storage tapes, computer with and without routine maintenance, therefore, to achieve high-resolution (up to Full-D1 resolution rate), high-quality real-time monitoring and easy to use. In short, NVR system of traditional video, digital audio and control signals through NVR network interface device to the form of IP packets transmitted over the network, the DVR based on the goal of the system's network.
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