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Data center migration, mobile Internet is the combination of mobile communication and Internet, and become one., according to the ministry by the end of October 2016, the total number of mobile Internet users in China has reached 1.077 billion, the number of users to access the Internet by mobile phone in 1.02 billion, a large number of mobile Internet users has brought enormous business opportunities, changed people's way of life.As an important part of mobile Internet, the data center is the most important one.The data center is the centralized place of Internet mass processing. Most data center data is for Internet users.Now, billions of Internet users are mobile.Access to the Internet via mobile phones, access to data centers, and access to the various application services provided by the data center, has infiltrated the public and deeply rooted in the public.However, no one thought of mobile Internet development so fast, a few years between access number increased from tens of millions to billions of above, and continues to high-speed growth (although only 1.4 billion people in China, but many people have begun to have two or more mobile phones), massive mobile data into to the data center has brought a lot of technical challenges.

Mobile access users are increasing, and the traffic is large.
Increase in the number of mobile users access speed is much more than we expect the pace of development, and network technology to chip performance growth, namely Moore's law, and at that time can't meet the user's access so much.In this way, when a large number of mobile users are accessing simultaneously, the network bottleneck is highlighted, resulting in poor user experience.This is why operators to develop the 4 g network, is to improve the mobile network access speed, is not only the carrier networks, the entry of the data center also needs to improve, g from 10 to 40 g 100 g, even entrance bandwidth, the objective is to deal with the mobile number of users access to the jump.However, the speed of the network construction is still can't keep up with the increase of the number of the mobile users, it using a mobile phone for application access, failure, broken network, playing video games, hd video broadcasting often visit caton, big flow of these in a short period of time will not be able to get the fundamental improvement.Fixed broadband mobile access and the biggest different is mobile properties, maintain access to the data center in the process of mobile application is not affected, need to introduce a new routing algorithm, don't interrupt, keep moving in the process of access to new basic network algorithm is needed here, in order to reduce the rate of bolt, for example in high-speed trains, on the subway, the weak signal in these special mobile scene, how to keep the data center access smoothly, be badly in need of some better algorithm.
The issue of mobile access security is prominent.
The mobile Internet has broken the boundaries of most of the business of the data center based on the network operation, and the security risks are even greater.In the mobile Internet environment, the TCP/IP protocol family of vulnerability, terminal operating system security vulnerabilities and attack technology popularization defects caused by the fixed network security issues still exist in the Internet environment, at the same time, also appeared some new safety problems and needs.Mobile phones are essential for mobile access.Mobile phone virus problems appear constantly loss, personal privacy of the information to the user information leakage, bank information disclosure, equipment malfunction or even damaged, and a series of harm, mobile phone viruses also can cause a serious threat to the safety of the data center.Current WIFI access extremely unsafe, especially some private erection, and special fishing, measure for measure, the chaos of the mobile access problem not only brought harm to the user, also cause losses to the data center.Many users encountered this kind of problem, their information was leaked or lost, often will anger to the data center applications, no longer use this application, for a data center is a large amount of loss of access to the user.The security of the mobile interface has hurt both the user and the data center, such as the street mouse, but there are many times when there is nothing to do.Security needs the efforts of the whole industry, from the aspects of technology, institutional constraints, personnel to ascend, otherwise there will be more and more data centers fall into the whirlwind of security.This greatly restricts the development of mobile access.
The data center application is designed for mobile access.
In the past, most applications of data centers were used for fixed user access. Nowadays, the number of mobile users is greatly increased, and the application is not considered. This will bring many problems.For example: WeChat application, compared with QQ, there are no offline and online concepts.It can be said that WeChat is 24 hours online, which should be consistent regardless of online or offline system performance.And one is the problem of the connection, due to the changes of cell phone signal strength, the signal is very good, a few seconds to poor reception area, the connection must be broken, the intermediate bring unstable factors bring greater difficulties to the protocol design.Then there is what price sensitive problem, because the mobile Internet is charged according to the flow rate, and the billing will make the problem of how to minimize transmission in protocol design, application software should avoid use mobile access to the user's flow, save the user traffic, not steal user traffic.People hate most is to steal flow software, found abandoned in the inevitable, the last is the problem of high latency, so many technical problems need to be in WeChat applications to consider and solve more.It's not just WeChat, it's a lot of apps on the phone.In order to better support mobile users to access applications, data center also to do optimization: on infrastructure to support virtual machine without awareness of migration, avoid single fault caused by the application, at the same time realize the long-distance backup data center applications, improve reliability in the data center;To support mobile users reconnect, rapid access to mobile traffic priority, in the process of transmission network traffic on priority tag, ensure priority for network, in order to make up for the defect of its high latency;Write data center to support double, two Master machine, when a machine fault, another machine can still receives the request, when the two machines staggered, a small amount of data is missing, the next visit will bring these data, and fix all the data, the application visit does not cause any influence.
Mobile access to the data center is still facing many technical problems, these problems are not at that time the can completely solve, it also suggests that the mobile Internet is still a is high-speed development and perfection of new things, not bad.It is not difficult to see, the development of mobile Internet have been unable to stop, the number of mobile users access data center will be more and more, although encountered such and such technical problems at present stage, but remember, these are not things that technology will continue to progress, step by step to remove on the way of development.