Cloud storage technology: Let "security Cloud" application no longer misty

Storage solution based on cloud technology

Cloud storage is a new concept that extends and develops in the concept of cloud computing (cloudcomputing), which means that a large number of different types of storage devices in the network can be assembled together through application software through cluster application, grid technology or Distributed File system. A system that provides data storage and business access functions together externally. With the development of network technology and the increase of bandwidth, cloud storage is becoming more and more promising in video surveillance. As the vane of future development, cloud storage mainly has the following advantages:

Cost Advantage

Cloud storage is not a storage, but a service; like a cloud wide area network and the Internet, cloud storage does not refer to a specific device, but to a collection of many storage devices and servers. Using cloud storage, the consumer does not use a single storage device, but rather a data access service that comes with the entire cloud storage system. In this way, users need not invest more in the server, hard disk and other back-end storage devices, only invest part of the service cost, and greatly reduce the cost of investment;

High efficiency for storage intelligence

All storage resources are integrated, users see a single storage space, while the cloud storage greatly improve storage efficiency, through virtualization technology to solve the waste of storage space, can automatically redistribute data, improve the utilization of storage space, such as users need 500T of storage space, He only needs to rent 500T of service, if need to increase space, just improve the lease space;

Faster data retrieval

For the system will produce a PB-class monitoring data, the number of storage equipment up to dozens of hundred units, so the scientific and efficient management methods appear very important. Cloud storage can provide a centralized management tool based on cluster management technology, which has the functions of centralized monitoring, cluster management, monitoring of system hardware and software operation status, active alarm, image system detection and so on. Retrieval performance is particularly important in the application of mass video storage retrieval. In traditional file system, the retrieval steps of "directory-> subdirectory-> file-> location" are used in file retrieval, and the efficiency of this retrieval mode is greatly reduced by the high definition video surveillance of massive data, the number of directories and files is very considerable. The problem can be solved effectively by using the ordinal file positioning.

Cloud storage can provide very high system redundancy and security. When the online storage system fails, the hot standby machine can immediately replace the service, when the fault recovery, service and data fetch; If the fault machine data needs to be called, you can insert the disk of the failed machine into the cold standby machine to achieve the immediate availability of all data.

As a trend of future security storage development, cloud storage vendors are combining various kinds of search, application technology and cloud storage to provide enterprises with a series of data services, however, the development of cloud storage is still limited by the following factors:

Network bandwidth limit, the real cloud storage system will be a multi-region distribution, all over the country, and even around the world's huge public system, users need to use ADSL, DDN and other broadband access devices to connect the cloud store. Only if the broadband network is fully developed, users will be able to obtain large enough data transmission bandwidth, to achieve a large number of capacity of the transmission, the real enjoyment of cloud storage services, otherwise can only be empty talk;

Data security, born from cloud computing, security has been one of the primary considerations for companies to implement cloud computing, and security remains a primary concern in cloud storage. Many users have even higher security requirements for cloud storage than their own architectures can provide. Even so, faced with such high unrealistic security requirements, many large, reliable cloud storage vendors are also struggling to meet their requirements by building data centers that are much more secure than most enterprise data centers and protecting data in storage with encryption layers and a protective layer comparable to the NSA. Today, users often find that cloud storage has less security vulnerabilities and that cloud storage provides a higher level of security than a user's own data center can provide.

The development of application storage, cloud storage is not only storage, more applications. Application storage is a storage device that integrates the function of application software, which not only has the function of data storage, but also has the function of application software, which can be regarded as a collection of servers and storage devices. The development of application storage technology can reduce the number of servers in cloud storage, reduce the cost of system construction, reduce the single point fault and performance bottleneck in the system, reduce the data transmission link, provide system performance and efficiency, and ensure the efficient and stable operation of the whole system.

At the same time, cloud storage should face the limitation of web2.0 technology, application storage technology, file system, Peer-to-peer, data compression, CDN Technology and virtualization technology. The maturity of cloud storage technology still has a long way to go.

Conclusion

With the development of high-definition monitoring, the user's requirements from the see see clearly. HD video massive data on storage system stability, scalability, search capacity, energy saving and environmental protection, cost and other aspects are very high requirements, the future of the security market will be the layout of two trends: one is a small video surveillance system to NVR, and the other is a large-scale video surveillance system, will be mainly cloud storage.

Cloud, a visible, invisible thing; Similarly, cloud technology makes many people listen more and understand less technology. However, in the rapid development of information technology today, cloud technology has become a trend, belonging to the high integration of resources, the typical means of reuse. However, as a typical cloud technology application, cloud storage lets us have the actual concept, lets the security this "cloud" no longer misty. Security as China's chaoyang industry, of course, can not fall, especially in the field of video surveillance.

With the popularity of high-definition technology, 720P, 1080P video has been everywhere, at the same time, based on the pursuit of clarity, the processing of intelligent analysis, 500W, 800W, and even tens of millions of higher-resolution cameras began to emerge; so high-definition monitoring, the problem is accompanied; High-definition video data from several g to dozens of G files, the storage device capacity, read and write performance, reliability, scalability and so on have put forward higher requirements for storage vendors are also facing greater challenges; it is very important to choose suitable data storage solution in video surveillance system. In the view of system construction, it is necessary to consider the factors of function integration, data security, data stability, system scalability, performance and cost.

HD Monitoring System has a large size, large amount of data, high reliability requirements, mainly reflected in the following aspects: The requirement of high concurrent reading and writing ability, the massive video data retrieval and intelligent analysis ability, reliable and safe data protection ability, flexible and convenient space expansion ability.

In the face of the challenges of the above HD storage, let's look at the storage solutions:

Node-type storage System

Node NVR architecture is mainly for small HD monitoring system, the number of High-definition front-end is generally within dozens of road. There is no large storage monitoring Center room in the system construction, the storage capacity is relatively small, the user experience degree, the system function integration requirements are higher. In response to such monitoring systems, World Albert Company M7 Series node-type NVR, Fusion dual HDMI local high-definition display, Agent forwarding, rich UI interface and intelligent analysis, not only can store 16 high-definition video images, but also in the video data intelligent analysis, fast search and positioning have done a deep optimization. This architecture for small systems, access to the front of the HD front-end less, different node video data can not be shared, but the system has a high level of functional integration, can be used as a large system distribution nodes to apply deployment. In the market application level, supermarkets, shops, small enterprises, law and politics industry, the basic management unit and other applications are more extensive.

Centralized Storage System

The Platform San architecture is mainly oriented to medium and large HD monitoring systems, with thousands or tens of thousands of front-end.

Generally use Ipsan or Fcsan to build HD video storage System. As an important part of the monitoring platform, the front-end monitoring data is stored in the San through the video Storage Management module.

This kind of architecture access to the high definition front-end way relative node NVR has a higher elevation, with fast and convenient scalability, technology maturity. For Ipsan, although the data in the iSCSI link to read and write transmission rate has been consumed, but it has a good scalability, hardware platform general, the vast number of data can be fully shared, and so on, still get a lot of customers. World Albert Ipsan hardware configuration redundant power supply, support RAID0, 1, 5, 6 technology, to ensure that users high-definition video data reliable security; multi-port Support load balancing function, can effectively deal with the concurrent reading and writing of HD system.

Fcsan in the industry users, closed storage systems, such as county or prefecture-level high-definition monitoring project, large data volume of concurrent read and write to Gigabit Network Exchange proposed a greater challenge, but the application of Fcsan to build a relatively independent storage subsystem, can effectively solve the above problems.

Facing the characteristics of large files and random reading and writing of video surveillance system, the redundancy of data sharing among different storage units in the Platform San architecture system needs to be improved. The strategy of forwarding video data to storage space from High-performance server also increases the hidden trouble point, iSCSI bandwidth bottlenecks lead to insufficient use of hardware data concurrency performance and less access to front-end data. The above problems have spawned a platform NVR architecture solution.

World Albert platform NVR architecture to storage system as the core of data management storage, reduce the deployment of storage servers, front-end video monitoring data directly into the storage unit, monitoring platform and client can be directly from the storage unit to read or call the video data.

This scheme eliminates the storage server in the system architecture, eliminating the above mentioned performance bottleneck and single point of trouble. The speed of writing and retrieving of storage system is greatly improved, and the problem of file system damage caused by the instability of power supply and network is completely eliminated.

The data stored in the platform NVR can be queried at any time by multiple clients, and when the user needs to view multiple saved video monitoring data, it can be directly queried by the authorized video monitoring client and the video monitoring data of the corresponding location should be used for historical image viewing. As the data Management Server has the monitoring system of all monitoring points of the index of video files, so through the platform CMS licensing, video monitoring client can query and on-demand the entire monitoring system on all monitoring points of data, this process is also transparent to the user.

In the current wide range of high-definition systems, platform-type NVR gradually occupy a more important position in the deployment of the large-scale monitoring system.