On the high-definition era, monitor storage encountered problems and it’s solutions

Video surveillance as an important basis when checking in at the bank, the judiciary, the application of the Safe City is very broad, and with the development of technology and the needs of the times, many places are installing high-definition camera. The data in these areas need to be stored in 1-3 months time or even half a year or more.  With the arrival of high-definition era coming, not only requires a high-definition camera, which also has high definition picture storage requirements, which is great for storage technology presents challenges.

   HD monitor storage requirements
   According to modern security monitoring storage requirements can be simply summed up as "high five":
   1.High capacity: HD brings surge storage capacity, needs a stable and reliable high-capacity storage: improve the capacity of a single system: extended by cascading multiple SAS JBOD, support 3TB, 4TB hard drives, RAID enhanced robustness; using clustered storage systems .Enhanced storage system flexibility scalability, reliability alone make up for deficiencies,
   2.High performance: high-definition monitor the total bandwidth requirements for high storage and storage performance tuning should be based on monitoring features: Performance optimization: concurrent high-definition large streams of data streams in different modes (read-write, edge deletion and writing, RAID rebuild) the IO performance optimization, NAS performance optimization, application combines: NVR software embedded in the application processing capabilities, the rational allocation of system resources;
   3.Energy efficiency: mass storage deployment is behind a lot of energy consumption, high cost, low power monitoring equipment should be designed: the era of the DVR, monitor manufacturers through the hard holiday to reduce power consumption and extend life, and network storage can Use MAID energy savings, but more suitable for a backup archive MAID environment; taking into account monitoring applications is 7 * 24 uninterrupted, choose a high power conversion efficiency (80Plus power supply or DC power) more valuable, can not affect the application of cases decreased energy consumption;
   4.High density: the basic monitoring requirements for storage is to reduce the cost per TB, the cost per slot: after the popularity of high-definition monitor, the original 3U16-bay equipment, limited storage capacity of a single, high-bay storage can support more cameras; 4U24 bit more of a high-density disk storage, each slot can effectively reduce costs and improve a single storage capacity, saving rack space;
   5.High Application: Storage must be designed for the monitoring of actual demand, solving customer pain points in order to survive: excessive file fragmentation results in performance degradation, vulnerability of the file system after a power outage, streaming direct writing, efficient indexing structure; improve NVR embedded applications convenience and compatibility, support for Windows / Linux software, provides API interfaces with external monitoring subsystem, to achieve high efficiency analysis, rapid positioning in massive data; to UIT's SV1000G2 example, from product design on throughout. " 5 high ", the use of end-to-SAS6Gb technology, Intel's latest SandyBridge platform to improve performance, 4U24/4U36 high-density design, support 3TB hard drives, to increase storage capacity in a single system, reducing the cost per slot; applicable conversion efficiency up 90% 80Plus power supply, you can save more energy, reduce system operating costs; may be more closely integrated with the control system through architecture optimization.

NVR was a mainstream cloud storage solutions

NVR as an integrated network video equipment, which combines video capture, preview and forwarding, storage, file system management and retrieval, playback and other functions in one, has been widely used in various types of network video surveillance system. In high-definition video surveillance, networking, and even intelligent trend lower, NVR storage solutions considered first cloud-based storage solutions, the industry has been affirmed.

Video surveillance system architecture will provide cloud clustered applications, grid computing and distributed file systems and other features of the device between the networks of different types of storage devices through a collection of software applications to work together, provide external data storage and business function access, in this framework, NVR will further enhance the scope of its application, will play storage node in the cloud architecture, but also will become the compute nodes to achieve more intelligent applications.

In this thought cloud storage, video data for each NVR storage on each other back up, not only the greatest degree of assurance of timely and efficient concurrent read and write, but also to ensure the security of stored data and reliable. This efficient and reliable in the future will be to monitor the industry to subvert the traditional business model, by the operator to invest in the construction of the monitoring system, and then provide cloud monitoring service to users, specifically video surveillance cloud services may have the following three modes:

Platform Hire: NVR by remote operators to deploy to build cloud-based NVR surveillance management platform, customers only hire operators monitor cloud service platform and Internet access bandwidth for remote video surveillance broadband network, to achieve real-time image preview, cloud mirror control, historical images inquiries and remote device management functions;

Space rental: operator deployments by offsite NVR, NVR-based management platform to build customer rented storage space provided by the carrier, digital image storage capabilities;

Equipment hire: hire operator customers a full equipment, such as cameras, platforms, storage space.

Meanwhile, also in conjunction with other professional HD NVR IT storage devices, towards energy saving, low power consumption trends, in addition to energy-saving design of the device itself, it will also increase the MAID storage applications, so that the non-writable disk in a non-working state , to reduce power consumption by optimizing the write mode while recording, decrease or reduce the hardware configuration of the device in the system to save energy.

Difficulties faced by high-definition monitor data storage

Although NVR cloud storage solution, but in reality, the market demand is changing, DVR, NVR, SDI-DVR and FCSAN, IPSAN other storage solutions coexist, have their own characteristics, but also difficult to meet all the needs. On the one hand the pressure from video surveillance data storage technology on the one hand but also the province has yet to be perfect.

This year, high security monitoring applications have become the fire can not fire a mainstream technology. In fact, to talk about what can be achieved HD sensation so high, in addition to be able to give us a higher level, more breakthrough video display, it "indeed affect the whole body." Influence, I am afraid to force the market for high-definition monitors have devoted themselves more energy. Front of the camera from the most basic to the transmission cable, the network environment, the compression efficiency, to the rear end of the monitor display, and storage capacity, have become an important factor in the definition of casting, and in this case, the definition of the hot concern is not surprising. In these factors mentioned above, the storage part is undoubtedly one of the areas we let the most talked about in the past two years. As a final distribution center for information security video management system, the pressure is also stored with the last two years to improve the system requirements become difficult to cap. Especially when encountered in the traditional storage model today when the explosive development of information, it is the application process, how it looks bloated.

1, the traditional large-capacity storage intolerable

In the framework of our traditional monitoring system, basically using the front-end device with a structural model of the DVR is completed. In the system, a video surveillance image information stored in distributed DVR, DVS, or by discrete control terminal for monitoring computer's hard drive. However, this mode is not to say that coping with a high-definition monitor, I am afraid that is the face of the current SD-weather surveillance, after a period of time will be somewhat difficult, not to mention the even more high-definition comes a huge amount of information called. In addition, the traditional centralized hard disk management, it will tend to concentrate in one place all the video data storage drives them, although this management model may give us data retrieval, or manage to bring some convenience . However, the security of data on, then I am afraid will face no small crisis. Due to the current overall capacity of the hard disk protection has not reached a very high level, so that when once the damaged hard drive or operating system failure occurs, the management of data probably will face the possible loss.

2, the shortage of storage space

Previously, security sector in many units to store information for video surveillance has a clearly defined time, ranging from basic in 1-3 months time. For some of the more important moments or video data, its storage time could reach six months. However, when the HD video emergence of more and more beginning to the rear end of the storage requirements increase in speed there is a situation, in this case, two to three times the amount of data to achieve the growth of PC destined to make traditional hard disk management, or local DVR model brings unexpected pressure. Under such a situation, or to expand the storage capacity of the system is, or is to reduce storage resolution, but in this case, the result is the video quality or storage costs as their final consideration.

3, the number of disk resources already intractable difficulties

In addition to the security and storage microscopic, when we build to analyze the overall system, it will also expose the device compatibility and other factors that reflect the difficult predicament. Due to the large monitoring systems are often phased construction, equipment used in the construction process is not consistent, so the final application, this variety of brands and models of devices to centralized management and monitoring of great difficulty. Meanwhile, the traditional DVR or DVS equipment, due to the limited transmission capacity of the network, it is difficult to form a unified storage, unified monitoring center architecture, enterprise data storage security monitoring appear to find trouble, scheduling is not timely, video storage and other issues dispersion produced.

4, supporting technology will save HD storage

In fact, for high-definition monitor this predicament brought on storage, even though we have proposed to work together with a variety of storage devices, or some of the ways to reduce the content of information stored, such as to relieve the pressure side. But from the source point of view, it is also required to belong only to solve temporary expedient. If you want to solve the problem of stress stored can find application in line with the definition of supporting technology, is still indispensable choice.

5, the front end can achieve compression technology or "closure"

Today, both the transmission or storage requirements, coding have become high-definition monitors to ensure a smooth one important way.

From our previous data we can see that if we in the application, the upgrade from MJPEG encoding format is H.264, then we can end our store directly eliminating more than 50% of the storage space. Because of this, more and more end users begin to upgrade the data format from MJPEG, MPEG-4 to H.264, so that compressed video takes up less space, while maintaining the same with the MPEG-4 video quality. While H.264 compression capabilities fixed on the screen, a little lacking in the former, but this does not hinder the user's pursuit for H.264.

How cloud storage technology to solve difficult problems storage

Obviously, the difficulty to solve the high-definition storage is not a camera problem, how to solve the problem, cloud technology is still the main solution.

1,The network is expected to a solution of the storm HD

In the beginning of this year, H.265 wind once again all eyes will be drawn to the relationship between the compression and HD. Since H.265 is a new video coding standard H.264 enacted after. The former is technically around the existing video coding standard H.264, while retaining the original number of mature technology, a number of other technologies to be improved. For example, to improve compression efficiency, improve the robustness and error recovery capability and reduce the delay in real time, reduction in the channel access delay and random access, reduced complexity and so has a high performance. Thus, this treatment for HD is undoubtedly more focused.

2, Cloud technology will provide back-end "clear"

Having the front of the "closure", we come to talk about changing the storage backend can bring us. This year, the application of cloud technology has allowed us to more thorough understanding of this technology has a future. Conceptually, this is a new technology by means of things, it is within the network storage space to achieve effective integration, according to need, so that the information stored in the network to find a broader internal storage space.

Although the current technology, the use of cloud technology for monitoring system as well as full coverage of certain difficulties. However, this is not due to defects caused by cloud technology, but has not yet fully reached the desired popularity only. Thus, cloud computing for storage pressures ease, has been regarded as an effective means for the future.

China IP Camera Manufacture -www.sysvideo.cn