Shulou(Shulou.com)06/01 Report--

With the help of cloud computing and big data technology, Jiangxi surveying and Mapping Geographic Information Bureau has created an efficient, intelligent and reliable private cloud service platform. the architecture of its dual-live data center and the advanced concept of divide-and-conquer between structured data and unstructured data are widely used for reference by their counterparts.

March 10, 2014 is a day that makes Jiangxi Provincial Geographic Information Bureau of surveying and Mapping remember deeply and feel proud. Following the public version, the government version of Jiangxi Geographic Information Public Service platform was officially launched on this day, indicating that Jiangxi Province has entered the era of geographic information. Gao Zhenhua, director of the Geographic Information Bureau of surveying and Mapping of Jiangxi Province, said in an exclusive interview: "the platform aims to make use of new geographic information technology." the use of visual two-dimensional and three-dimensional electronic maps to provide government departments and the public with basic geographic information services such as map browsing, information query, search and positioning, points of interest tagging, data superposition and spatial analysis. "

The most basic supporting platform

Jiangxi Geographic Information Public Service platform mainly has the following three service functions. First, the platform can serve the government, that is, to provide data support for the government's scientific decision-making. Second, the platform can be used as the "general background" of the information application system of various departments and bureaus in Jiangxi Province, and other departments and bureaus can build their own business platforms on this platform without having to repeat the construction of new platforms. At the same time, the platform can provide all the geographic information data of the topography of the province, and the business systems of other offices and bureaus can obtain first-hand geographic information data from the platform through open interfaces. Third, the platform can provide people with guide and navigation information, as well as positioning and inquiry functions.

The importance of Jiangxi geographic information public service platform is also reflected in that it is a key node of the national interconnected geographic information public service platform from the central to the provincial level and then to the municipal level. Through this platform, people can not only query the geographic information of Jiangxi Province, but also understand the geographic information of other parts of the country. Gao Zhenhua said: "it is very important to build such an interconnected basic information platform, but this is only the first step. The next more difficult task is how to maintain the platform, constantly update data and achieve application innovation. We want it to really play a role in people's work and life, and to be easy to use and easy to use. This is a serious challenge for us."

Gao Zhenhua said: "since this public platform was built, more than 20 units have been in use, and the effect is very good. In particular, the Department of Land, the Water Resources Bureau, the Forestry Bureau, the Jiangxi Provincial Emergency Office, the Provincial Armed Police Corps and other relevant units are very enthusiastic about the application of this platform."

Cloud platform with a high starting point

During a visit to the Jiangxi surveying and Mapping Geographic Information Bureau, the reporter found that the Jiangxi surveying and Mapping Geographic Information Innovation Base had just been put into use, and the new computer room was still in the process of installing and debugging the system. According to the plan, Jiangxi Provincial Geographic Information Bureau of surveying and Mapping will build two data centers in new and old office buildings. In this way, the question arises: whether to keep nearly 50% of the data center resources in a cold standby state and not provide access services on a daily basis, or according to the idea of building a data center based on cloud architecture, break the limitations of regions and brands, and thoroughly realize the pooling of data center resources, so that business applications and services can drift online. Jiangxi Provincial Geographic Information Bureau of surveying and Mapping has firmly adopted the cloud architecture double-live data center model.

The design of cloud architecture Shuanghuo data center ensures that the public service platform of Jiangxi surveying and Mapping Geographic Information Bureau has high reliability and scalability. On the one hand, the architecture of the dual-active data center ensures that the two centers can provide access services at the same time. Compared with the traditional one-master-one-standby architecture, the resources of external services are twice as large as in the past, and the resource utilization is maximized. On the other hand, the architecture of Shuanghuo data center makes the underlying IT infrastructure completely transparent to the front-end business applications, and each functional module of the public service platform does not have to care about what and where the underlying computing, network and storage are, but can call these IT resources as easily as water and electricity.

Wang Wei, director of the data center of Jiangxi Geographic Information Bureau of surveying and Mapping, said: "the cloud architecture is adopted in the construction of Jiangxi geographic information public service platform, which is a leader in the country. By introducing the concept of cloud, virtualizing physical resources and combining different levels of virtualization technology, we can finally eliminate the single point of failure of computing, network and storage nodes, and ensure that the cloud platform provides 7 × 24-hour service without interruption."

At present, the biggest change of Jiangxi Geographic Information Public Service platform is to transform the original offline data service into online data service. Wang Wei said that before adopting the dual-active architecture, they had also considered many other ways, but had to give up because of cost, efficiency, flexibility in resource application, and other issues. " We hope that through the dual-live architecture, we will be able to balance and freely mobilize resources in the old and new data centers. Under the dual-active architecture, each time data is written, the two data centers are synchronized and resources can be shared. Even if there is a problem in one of the data centers, the business continuity will not be affected. " Wang Wei said, for example, "the ecological construction projects of Poyang Lake and the national census projects are all carried out in the Shuanghuo data center."

After the Shuanghuo data center is put into operation, many colleagues have come to visit and learn from it, and some of them have planned to build their own double-live architecture with reference to the model of Jiangxi surveying and Mapping Geographic Information Bureau. " In recent years, with the rise of the tide of informatization in the field of surveying and mapping, the construction of digital cities and smart cities is highly dependent on geographic information. Not only that, customers in the fields of local tax, earthquake, transportation, emergency and so on are also using our online data services. Our task is to do a good job of the underlying architecture and system support to ensure the continuity of services. " Wang Wei said.

Although the double living structure is good, not all enterprises have to follow the trend. Wang Wei said frankly: "if the requirements for business continuity are not very high, there is no need to build a double-live data center." The maintenance cost of Shuanghuo data center is high, including capital and manpower. In the past, when the market demand for surveying and mapping data was not so extensive, we did not expect to build a dual-live architecture. Whether to build a double-live data center must consider its own actual needs, and should not blindly follow the trend. "

Efficient storage platform

In order to ensure high performance, the storage system of the double-live data center of Jiangxi surveying and Mapping Geographic Information Bureau basically chooses EMC storage equipment. When visiting the computer room, the reporter found that from high-end EMC VMAX to middle-end VNX, from cloud storage VPLEX, Isilon to DD series backup equipment, EMC equipment is available.

Geographic information data has the characteristics of large amount of data, various forms, rich sources, complex structure and so on. Wang Wei said that in the surveying and mapping industry, unstructured data is as important as structured data. Jiangxi Geographic Information Public Service platform has the following requirements for the data storage platform: first, the storage and management ability of massive data; second, the processing capacity of massive data; third, good data protection capability. Finally, Jiangxi surveying and Mapping Geographic Information Bureau decided to separate the structured business data pool such as database from the unstructured data pool, and select the most suitable data storage pool according to the types and characteristics of different business data. in order to achieve geographic information data from generation, collection, storage to archiving and backup of fully automated life cycle management.

IT data center based on cloud architecture breaks through the limitation of physical location, can better integrate and coordinate resources, and dynamically allocate various types of resources to different business applications based on strategy, thus greatly improving the flexibility and resource utilization of IT infrastructure.

In order to meet the needs of the dual-active architecture, the core storage of both data centers uses EMC's high-end EMC VMAX 10K. Synchronous mirror disaster recovery can be realized between two EMC VMAX 10K, eliminating a single point of failure of the storage array, and zero downtime switching of the business system can be realized without human intervention.

"for us, data is the most important. Therefore, we must choose storage devices with good quality, strong performance and good stability. After product testing and multi-party comparison, we still put the core application on EMC storage devices." Wang Wei said.

Dividing structured data and unstructured data can improve the efficiency of data processing. The database data of Jiangxi surveying and Mapping Geographic Information Bureau is mainly used for online query service and results release. At present, it is mainly stored on EMC VMAX and VNX devices, while unstructured data requires high horizontal expansion ability of storage, so it is mainly stored on Isilon devices. Isilon adopts a unique cluster architecture that allows servers in multiple data centers to have read / write access to shared block storage devices. It also features advanced data caching, which can take advantage of large-scale SDRAM caching to improve performance and reduce Imax O latency and array contention.

Many enterprise users do not divide the data into such fine layers as Jiangxi Provincial Geographic Information Bureau of surveying and Mapping, and usually only need a unified storage device to solve the problem. In Wang Wei's view, different types of data have different requirements for access performance, scalability, availability, and so on. Only through careful planning and establishing an efficient data center infrastructure can we reduce the cost and pressure on management and maintenance in the future.

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