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云计算英语作文Cloud computing is revolutionizing the way we store and access data. It allows us to access our files from anywhere with an internet connection, making it easier to collaborate and work remotely.One of the biggest advantages of cloud computing is the cost savings it offers. Instead of investing in expensive hardware and software, companies can simply pay for the services they need on a subscription basis. This makes it much more affordable for businesses of all sizes to access the latest technology.Security is always a concern when it comes to storing data online, but cloud computing providers have made great strides in ensuring the safety of their users' information. With encryption and other security measures in place, the risk of data breaches is minimized.The scalability of cloud computing is another majorbenefit. As your storage or computing needs grow, you can easily upgrade your plan to accommodate more data or processing power. This flexibility allows businesses to adapt to changing demands without having to invest in new infrastructure.Overall, cloud computing offers a convenient and cost-effective solution for storing and accessing data. With its security measures and scalability, it is becoming an increasingly popular choice for individuals and businesses alike.。
英语作文关于云计算Cloud computing, a term that has been gainingpopularity in recent years, refers to the delivery of computing services such as storage, servers, networking, software, and analytics over the internet. It allows individuals and businesses to access and use these resources on-demand, without the need for physical infrastructure or hardware. This revolutionary technology has transformed the way we store, process, and manage data, and has had a profound impact on various industries and sectors.One of the key benefits of cloud computing is its cost-effectiveness. Traditionally, businesses had to invest in expensive hardware and software to set up their own IT infrastructure. With cloud computing, they can simply pay for the services they use, and scale up or down as needed. This not only reduces the initial capital expenditure but also eliminates the need for ongoing maintenance and upgrades. As a result, businesses can focus on their coreactivities and allocate resources more efficiently.Another advantage of cloud computing is its flexibility and scalability. Cloud services can be easily accessed from anywhere with an internet connection, allowing users to work remotely and collaborate in real-time. Additionally, cloud resources can be quickly scaled to meet changing demands, whether it's an increase in storage capacity or a surge in website traffic. This agility enables businesses to adapt to market changes and customer needs more effectively, giving them a competitive edge.Furthermore, cloud computing offers improved security and reliability. Cloud service providers invest heavily in data security and compliance, ensuring that sensitive information is protected from unauthorized access and cyber threats. Additionally, the distributed nature of cloud infrastructure means that data is replicated acrossmultiple servers and locations, reducing the risk of data loss due to hardware failure or natural disasters. This provides businesses with peace of mind and minimizes downtime, allowing them to focus on innovation and growth.In addition to these benefits, cloud computing also enables innovation and collaboration. By leveraging cloud-based tools and platforms, businesses can develop and deploy new applications and services more quickly and cost-effectively. This has led to the rise of cloud-native technologies and practices, such as microservices, containers, and serverless computing, which are driving digital transformation and accelerating the pace of innovation. Furthermore, cloud computing facilitates collaboration and knowledge sharing, as teams can easily access and work on the same set of resources and data, regardless of their location.Despite its numerous advantages, cloud computing also poses certain challenges and considerations. For instance, organizations need to carefully assess their security and compliance requirements when migrating to the cloud, and ensure that they have the necessary controls and policiesin place. Additionally, they need to evaluate the performance and reliability of cloud services, and consider the potential impact of vendor lock-in and data sovereigntyissues. Furthermore, as the volume of data and applications in the cloud continues to grow, there is a need for robust data management and governance strategies to ensure data quality, privacy, and regulatory compliance.In conclusion, cloud computing has become a game-changer in the IT industry, offering businesses and individuals a wide range of benefits, including cost-effectiveness, flexibility, security, and innovation. As the technology continues to evolve and mature, it is expected to further transform the way we work, communicate, and do business. However, it is important for organizations to carefully evaluate the opportunities and challenges associated with cloud computing, and develop a strategic approach to leverage its full potential. By doing so, they can harness the power of the cloud to drive growth, efficiency, and competitiveness in the digital age.。
英语作文云计算Cloud computing is a game-changer in the world of technology. It allows individuals and businesses to access and store data and applications over the internet, rather than on a physical hard drive or server. This means that you can access your files and software from anywhere with an internet connection, making it incredibly convenient and flexible.One of the biggest benefits of cloud computing is the cost savings. By using cloud services, individuals and businesses can avoid the high costs of purchasing and maintaining physical hardware. Instead, they can pay for only the resources they use, making it a much more cost-effective option.Security is always a concern when it comes to technology, and cloud computing is no exception. However, many cloud service providers offer top-notch security measures to protect your data. This includes encryption,firewalls, and multi-factor authentication, giving users peace of mind when it comes to the safety of their information.The scalability of cloud computing is another major advantage. As your business grows, you can easily scale up your cloud resources to meet the increased demand. This means that you don't have to worry about investing in new hardware or software every time your business expands.In conclusion, cloud computing has revolutionized the way we store, access, and manage data and applications. Its cost savings, security measures, and scalability make it an attractive option for individuals and businesses alike. As technology continues to advance, it's likely that cloud computing will play an even larger role in our daily lives.。
云计算英语作文Cloud computing is a revolutionary technology that has changed the way we store, access, and process data. It allows us to store our data on remote servers and access it from anywhere with an internet connection. This means we no longer need to rely on physical storage devices like hard drives or USBs.One of the biggest advantages of cloud computing is its scalability. You can easily increase or decrease your storage and processing capabilities based on your current needs. This makes it ideal for businesses that experience fluctuations in their data usage.Another benefit of cloud computing is its cost-effectiveness. Instead of investing in expensive hardware and software, you can simply pay for the services you need on a subscription basis. This can significantly reduce the upfront costs of setting up a new business or expanding an existing one.Security is always a concern when it comes to storing data online, but cloud computing providers invest heavilyin security measures to protect their users' data. They use encryption, firewalls, and other advanced technologies to ensure that your information is safe from unauthorized access.In addition to data storage, cloud computing alsooffers a wide range of services such as data analytics, machine learning, and artificial intelligence. This allows businesses to access advanced technologies without having to invest in expensive hardware or hire specialized personnel.Overall, cloud computing has revolutionized the way we store, access, and process data. It offers scalability, cost-effectiveness, security, and a wide range of services that can benefit businesses of all sizes. As technology continues to advance, we can expect cloud computing to play an even bigger role in our digital lives.。
云计算英语作文Cloud computing is a game changer in the field of technology. It has revolutionized the way we store, access, and process data. With the power of cloud computing, we can now access our files and applications from anywhere in the world.One of the key benefits of cloud computing is its cost-effectiveness. Instead of investing in expensive hardware and software, businesses can simply pay for the services they use. This not only reduces the initial investment but also allows for scalability as the business grows.Security is a major concern when it comes to storing data in the cloud. However, cloud computing providers have made significant advancements in ensuring the security of data. With advanced encryption and security measures, cloud computing has become a safe and reliable option for data storage.The flexibility and agility of cloud computing are unmatched. With the ability to quickly deploy new applications and services, businesses can stay ahead of the competition. This agility also allows for faster innovation and adaptation to changing market demands.Cloud computing has also had a significant impact on collaboration and communication. With cloud-based productivity tools, teams can work together in real-time, regardless of their physical location. This has greatly improved efficiency and productivity in the workplace.Overall, cloud computing has transformed the way we do business and interact with technology. Its cost-effectiveness, security, flexibility, and collaboration capabilities make it an indispensable tool in today's digital world.。
关于云计算的英语作文Cloud computing has become a game-changer in thedigital age. It's like having a magic box that stores all your data and apps, so you can access them anywhere, anytime. It's not just for big businesses either; even small companies and individuals can benefit from it.One cool thing about cloud computing is that it's super flexible. You can scale up or down your storage and computing power as needed, without having to invest in expensive hardware. It's like having a personal assistant who can adjust things on the fly.And speaking of assistants, cloud computing makes collaboration easier than ever. Team members can work on the same documents or projects at the same time, no matter where they are. It's like having a virtual office that's always open and accessible.But the best part about cloud computing is probably itscost-effectiveness. Instead of buying and maintaining your own servers, you can pay for only the services you use.It's like having a buffet of computing resources, where you can pick and choose what you want without wasting anything.Of course, there are some concerns about cloud computing, like security and privacy. But with advancements in technology, these issues are being addressed more and more. So, whether you're a business owner or just a tech-savvy individual, cloud computing is definitely.。
关于云计算的英语作文Cloud computing has become a buzzword in the tech world, and it's not just a fancy term. It's a real revolutionthat's changing how we store, access, and share data. Think of it like a huge virtual warehouse where you can store all your files and info, and access it from anywhere, anytime.For businesses, cloud computing is a game-changer. No more need for expensive hardware or servers taking up space in the office. Everything's stored in the cloud, so you can focus on what really matters: running your business. Plus,it's scalable, so you can easily expand or reduce your storage needs as your business grows or changes.But cloud computing isn't just for big businesses. Even individuals can benefit from it. Remember those days when you had to email yourself files just to access them on a different device? With cloud computing, all your files are always with you, no matter which device you're using. It's like having a personal assistant who always knows whereyour stuff is.And let's not forget about security. A lot of people worry about putting their data in the cloud, but modern cloud services have robust security measures to protect your info. Plus, with encryption and other technologies, your data is safer in the cloud than it would。
英语作文云计算Cloud computing is a game-changer in the world of technology. It has revolutionized the way we store, access, and manage data. With cloud computing, we can access our files from anywhere with an internet connection, making it incredibly convenient and efficient.One of the biggest advantages of cloud computing is its cost-effectiveness. Instead of investing in expensive hardware and infrastructure, companies can simply pay for the services they use. This not only saves money but also allows businesses to scale up or down as needed without any additional costs.Security is always a concern when it comes to storing data, but cloud computing has made great strides in this area. Cloud service providers invest heavily in security measures to protect their users' data, making it a safe and reliable option for businesses and individuals alike.The flexibility of cloud computing is another major benefit. Users can easily access and collaborate on documents and projects in real-time, regardless of their location. This has completely transformed the way we work, allowing for greater productivity and efficiency.In conclusion, cloud computing has completely changed the way we store, access, and manage data. Its cost-effectiveness, security, and flexibility make it an invaluable tool for businesses and individuals alike. As technology continues to advance, it's clear that cloud computing will play an increasingly important role in our lives.。
英语作文云计算Cloud Computing。
Cloud computing is a new technology that has revolutionized the way we use and store data. It is a technology that allows users to store, access, and process data over the internet, rather than on their own computers or servers. The cloud is essentially a network of servers that are connected to each other, and users can access this network through the internet.There are several benefits of cloud computing. One of the biggest advantages is that it allows users to access their data from anywhere in the world, as long as they have an internet connection. This means that users can work remotely, which is especially important in today's globalized world. Cloud computing also allows for easy collaboration, as multiple users can access the same data at the same time.Another benefit of cloud computing is that it is cost-effective. Users do not need to invest in expensive hardware or software, as all the necessary infrastructureis provided by the cloud provider. This means that businesses can save money on IT expenses, and can redirect those funds towards other areas of the business.However, there are also some concerns about cloud computing. One of the biggest concerns is security. Since data is stored on a remote server, there is always a risk of data breaches and cyber attacks. Cloud providers must take measures to ensure the security of their servers, and users must take precautions to protect their data as well.Another concern is privacy. Since data is stored on a remote server, users must trust the cloud provider to keep their data private and secure. There have been instances where cloud providers have shared user data with third parties, which has raised concerns about privacy.In conclusion, cloud computing is a technology that has transformed the way we store and access data. It offersmany benefits, such as easy access and cost-effectiveness, but there are also concerns about security and privacy. As cloud computing continues to evolve, it is important for both cloud providers and users to take steps to ensure the security and privacy of their data.。
A Review Of Cloud ComputingTeam members：许慧平赵曼刘强罗宾2012年3月22日A Review Of Cloud ComputingAbstract:cloud computing is a kind of super calculation mode based on Internet. For the category of cloud computing ,this paper concludes the concept of cloud computing , emerging background, the present main applications, the future development of the prospect and the present's problems.Keywords: cloud computing; data processing; distributed computing; Internet1. Producing of Cloud Computing1.1 what is cloud computingThe producing of Cloud computing has a big background inevitability.First,the development of Communication and Internet is faster than the development of Computer .That situation offers a soil for growing of Cloud computer.Second, Software engineering changed the way of faceing the service such as facing machine,language and middleware into the way of facing service and need.That made SAAS （Software as a Service）to come true.Third, the users beginning to pay close attention to core business more and more.They don't need to become a real “Amateur engineers”.It is what the Cloud computer brought the important changing on the way of using IT facility for users.Cloud computing is a resource delivery and usage model, it means get resource (Hardware, software)via network. The network of providing r esource is called ‘Cloud’. The hardware resource in the ‘Cloud’ seems sc alable infinitely and can be used whenever.1.2 The principle of cloud computing1.2.1 three method of calculation:Parallel processingParallel processing computer system can perform a calculation of two or more processors. Processors can work simultaneously on different aspects of the same program. For the use of parallel processing,it can be said of a program executed on n processors speed may be performed on a single processor speed n times.Distributed processingDistributed processing system will be in different locations or multiple computers with different functions or different data communications network linking under the control of the control system of unified management and coordination to complete the computer system for information processing tasks.Grid computingGrid computing is accompanied by the Internet and the rapid development of the new computing model, specifically for complex scientific calculations. This computing model is the use of the Internet dispersed geographically computer organization into a "virtualsupercomputer", each of which involved in the calculation computer is a "node", the entire calculation is made up of thousands "nodes "consisting of a grid, so this method of calculation is called grid computing.What cloud computing is? Cloud computing is an emerging business computing model.Specifically, Cloud Computing is a kind of distributed processing,parallel processing and grid computing development, or commercial implementation of these computer science concepts The transmission capacity of the high-speed Internet, data processing process from a personal computer or server to a cluster of computers on the Internet., This is a revolutionary move, the analogy, which is like a shift from the old single-generator mode to the mode of the power plant centralized power supply. It means that computing power as a commodity circulation, like gas, water and electricity, like, access to convenient, low-cost. For example it! Our computing model is most locally installed software, and then exchange data with the server through local processing, cloud computing, we do not need local processing, just use the browser.After understanding of what cloud computing, let us understand some of the other cloud computing.Cloud Computing ArchitectureMost of the cloud computing infrastructure is transmitted through the data center a reliable service and the different levels of virtualizationtechnology on the server. People can use these services in any network infrastructure.Cloud serverCloud server is a set of clustered servers on virtual quasi-independent part of the server, cluster, each server has a mirror image of the cloud server.Also cloud computing is similar with VPS server virtualization technology, cloud server is a VPS is a virtual software, the VZ or VM on a single server virtual quasi-independent part of the server, each part can be done to separate the operating system, management methods the same server.1.2.2 The core technology of cloud computing1)Programming model. For large-scale data sets (greater than 1TB)parallel computing. Strict programming model that makes cloud computing programming environment is very simple.2)Huge amounts of data distributed storage technology.Cloudcomputing system consists of a large number of servers, as well asa large number of users, cloud computing system uses the storeddata of distributed storage, redundant storage to ensure data reliability.3)Huge amounts of data management technology.Cloudcomputing on the distribution of vast amounts of data processing,analysis, data management technology necessary to efficiently manage large amounts of data.Virtualization technology. Virtualization technology enables software applications and the underlying hardware isolation, which includes a single resource is divided into multiple virtual resources splitting mode, including the integration of multiple resources into a virtual resource aggregation mode. Abstract the server physical resources into logical resource, allows a single server into several virtual servers or even hundreds of isolated, we are no longer limited by physical boundaries, but the CPU, memory, disk I / O hardware into a dynamic management of the resource pool, to improve resource utilization, simplify systems management, server consolidation, IT business change more resilient.2.1 The application area of Cloud ComputingAs well known,a new technology is invented is to meet the needs of the application.And the technology will also continuously improve and develop with the needs of the application.So is the Cloud Computing.Cloud computing are able to be applied because of its mass of data processing power and efficient computational ability.But Owing to the cloud computing started late,now a lot of application are still instudying stage.Thus,I only plan to introduce some applications which have used as following.2.1.1 Scientific researchThere are three major applications in scientific research,namely earthquake monitoring,marine information monitoring and astronomy calculation information processing.These applications need to combine with sensor technology.Such as temperature transmitter,depth sensor.The sensors are used to collect signal and convert to voltage signal,then send them to Cloud computing servers through Internet to process and store.We can get from the servers when needed at any time.Because the information is of large amount,it need high speed powerful computer to process,now the "Cloud" is used on.This is the major using of Cloud.2.1.2 Network SecurityNetwork security is now a very popular topic.Especially the network virus is growing rapidly.So virus library storage is a major concern.Cloud mass data storage capacity can meet the need.For example,Rising "Cloud Security" plan,its working principle is as follows.The client can be automatically to connect to the server and scanning user's PC,then send the suspicious objects to servers to match and return the result in seconds.The servers will warn the client to deal with the object if the object is virus.Another using is the Spam shielding which is also used thecloud mass data storage capacity.2.1.3 MedicineDNA information storage is the best reflecttion of the mass data storage of cloud.1.3 billion people in the world with unique DNA information need to store and analysis.We must have enough room to store the information and access to it at any time.The "Cloud" is used to achieve it.And it's also applied to cases storage which can help to achieve global medical integration.Besides,medical image processing is also a important application.2.1.4 InternetNow the most important applications of network is retrieval service.But the mass of information stored in the servers.In order to get what the user wanted,the Internet suppliers must supply fast and efficient algorithm to screening best matched information.Thus the cloud's efficient computing power is used to do it.For example,Google Cloud computing platform is put forward just to implement efficient retrieval function at first.And E-mail server and online real-time translation are also used on Cloud.2.1.5 The radio and television industry applicationThis application only on ideas stage now and it has not come into use.The idea is big cable companys can establish a Cloud computingplatform together to meet their need to make high definition and high quality audio.At the same time,a litter cable companys also want to make some high quality audio,but they can not afford to the high configured equipments.So the big cable companys can spare some idle resources to the litter ones which needed.In this way,not only can they meet their own need,but also can they make fully use of their resources.Otherwise,now some sensitive information like radio and video need large mount of space to store,so we can store them to the Cloud which has mass data storage capacity.2.2 The four famous Cloud service platformsActually, the Cloud Computing research by academic is much earlier than the proposal of its concept.We ,the Chinese researchers,have had the transparent Computing idea before the emergence of the term which is called "Cloud Computating".Transparent cloud computing embodies the characteristics of cloud computing,that is dynamic resource pools, virtualization, transparent to the user etc.At present,industry to provide cloud computing that not many companies.And more influential platforms have Google Cloud computing platform, IBM Blue Cloud platform,Amazon Elastic Compute Cloud(EC2) platform and Microsoft Azure computing platform.2.2.1 Amazon EC2 platformAmazon is a E-commerce company which is the earliest to supply Cloud computing service.Every day a huge amount of business transactions require a huge amount of data centers to improve the availability of services, which may cause the waste of idle computing resources and network resources.In order to improve the efficiency, Amazon set up the EC2 platform.Customers can be provided by EC2 web server interface to create the virtual machine to run their applications so as to realize the deployment of the scalability, the user on-demand instant pay.In this way,for ISP not only can they meet their own need,but also solve the problem of wastage of resources and make resources the most efficiently used.To the customers,Both saved the high cost of high performance hardware configuration, also can call charges minimum cost but it can get the best service to the forehead.2.2.2 Search engineWith Google's cloud computing platforms for representative.Search engine is a system to provide users with retrieval service,which refers to certain strategy, using specific computer program search of information on the Internet, in information for organization and processing, and will show to users after processing the information .In Web1.0 era, information on the Internet without so much now, users need to guide to browse information.And now, with the Internet information explosive growth, there is a large amount of information required to store and forthe user to browse, users need from the vast amount of information they want to extract useful information, must depend on the search engine to find, so the cloud computing is put on the agenda.In order to be able to retrieve the mass information in the user need useful information, there must be quick optimization retrieval algorithm to solve the communication between the server and writing problems, and complete the rapid and effective information retrieval functions.The client can provide the key word to search for "clouds" of the computer, the computer through mutual cooperation assigned tasks to complete the information to the retrieval, and then returned to the user of the client, it will be faster and more effective than PC directly to the server request data retrieval.2.2.3 Microsoft Azure cloud computing platformWindows Azure is a cloud service operating system, providing developers with the need to use the calculation and storage resources.Azure cloud platform contains four levels.The bottom is Microsoft global basis service system, the cloud infrastructure services layer takes Windows Azure operating system as core, Windows Azure above is a application service platform, for the user to provide a series of services, the top is Microsoft for the user to provide services.As most Windows users now is, which allows the user to sustain their usage, faster application will run on migration to the Azure platform.2.2.4 IBM Blue Cloud platformIBM's Blue computing platforms will expand the technology used on the Internet to enterprise platform, so the data center using similar on the Internet computing environment.It consists of a data center, IBM Tivoli monitoring software, DB2 database, IBM Tivoli deploy management software, and IBM Web Sphere application server virtualization software and open source and some open source information processing software.Blue software platform characteristics are mainly embodied in the virtual machine and mass data processing software for Apache Hadoop use on.Through the way of the virtual machine , cloud computing platform has some advantages as the follows.First,process transfer method more flexible.Second,reduce the cluster electric power, achieve the purpose of saving energy.Third,to get the load balance has nothing to do with application performance.Fourth,the deployment of more flexible.Now,with the development of Cloud computing technology,more and more applications will be put forward and put into use.Our life will open cloud era.3. Development of cloud computing3.1 Technology prospectsIn the user's standpoint, cloud computing system will put all kinds of data including user data to a remote cloud storage platform through the network, reducing the burden of management for data users; At the same time, cloud computing systems will also deal with data service program through the remote large-scale computing clouds processing platform, and can afford large amounts of data processing work. It can be said that cloud computing is a complex of data sharing calculation mode and Shared services calculation mode, and will be the next generation of computing model . From the platform technology architecture we can see, cloud computing has three characteristics, that system based on the scale of the cheap server cluster , through the infrastructure and the upper applications to maximize the efficiency of the collaborative construction to use hardware resources , and tolerating mistakes of multiple nodes through the software method . Because the cloud computing have these three basic characteristics above, it reached two aspects of target of a distributed system,i.e. scalability and reliability.In the future, there are two main development directions: one is the establishment of integrated mass bottom infrastructure, making the application to expand to a very large size; the other is by establishing new cloud computing applications, to provide more rich user experience online. The first development trend has been reflected by the existingresearch of the cloud computing . And as for the construction of the cloud computing applications, a lot of new social service networks, such as facebook, etc, had reflected the development trend, and the research is beginning to focus on how to combine multiple businesses.3.2 Commercial prospectsCloud computing is not only the core of the calculation, is also a kind of service, a commercial applications. Large scale, virtualization, high reliability, high expansibility and compatibility , many agencies are doing research on it . Cloud computing is an operation mode, in this mode, IT application data and IT resources data are provided through the network to all kinds of users widespread through the network . Cloud computing is the business model of charging by using, simplified service interface.Cloud computing will have a significant impact to individuals, small or medium-sized enterprises, IT industry and other aspects . For individuals, cloud computing will change the habit of computer using, from desktop as the core to more Web as the core, the computer degenerated into a simple terminal. Cloud computing services will realize from the computer to cell phones, car, home appliance migration, puting all the computer networking to home appliances. For small and medium-sized enterprises, business information and management platform will be deployed to cloud computing platforms, the cost of theinvestment will be greatly reduced .Thus,products and market competition become brutal. In the IT industry, to the server manufacturers, cloud computing and data center make the demand for server systems expand , market prospect is promising. To the terminal equipment manufacturers, networked computing clouds interruptting equipment, especially small mobile equipment diversifiing and individuation development provides an important opportunity. For the software industry, with technology, data and service networked, Google and other network service companies need to change the commerce mode of software using.Microsoft dominating the desktop system will no longer be the situation, service in the software industry faces new challenges. In addition, cloud computing, attributes to safety of international public information service network, making enormous influence on national security system .According to the latest data, cloud computing will be in 2013 up to 10% of the overall IT consumption, yearly gains as high as $42.2 billion. In four years, the market will have a great value, cloud computing applications will run everywhere. It brings the upheaval of the history, the PC era has already crossed over to the cloud computing era.3.3 Problems cloud computing faced withThe benefits of cloud computing so attractive, but at the same time, it has high risk. 1. safety: use cloud computing means that data is transferred to the machines beyond user's sovereignty, that is to the cloud computing service provider , then people worring about the safety of these data also makes sense. How to ensure that the user information and privacy or business data don't leak out or be stolen is what users most concern about. 2. data isolation: due to the characteristics of cloud computing, users don't know which server the data stored in . And information protection laws and regulations are different in different countries, how to ensure that data isolation; 3. user data long-term existense: the IT world competition is intense, services the company is likely to be eliminated, annexation at any time, how to ensure that the user data long-term viability; 4. reliability and contrllability: the interruption of amazon s3 service in 2008, GoogleApps service , Gmail service let us seen the awkwardness of computing clouds for two earliest advocates because of network fault .Especially the loss caused by large enterprise is immeasurable, how to guarantee the reliability of the cloud computing , how to improve the controllability; 5. hackers using: the characteristic of providing extremely low cost effectiveness can also be made use of hackers to gain super calculating power with little cost.Once these "cloud" is used to decipher all kinds of password to all kinds of attacks, damage and other activities, it will do great harm tosociety.Despite that cloud computing is the trend of the future technology, but factors above may be huge obstacles for the development and popularization of cloud computing , so it is important and urgent to solve these problems in the development of cloud computing .References:[1] Chunye Gong ,Jie Liu,,Qiang Zhang,Haitao Chen and Zhenghu The Characteristics of Cloud Computue Depatment of Computer Sciences ,National University of Defense Technology,Changsha,China [2] 维基百科. 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