Cloud computing

Universal access

  Many people think that the cloud is the Internet, but Deloitte Consulting’s cloud expert and chief cloud strategy officer David Linthicum said that it is “actually just a connection mechanism”. In the information technology world, the cloud is just an abbreviation for “others’ computers.” “You can manage and store your content (music, photo data) anywhere, and use the Internet to access servers in large data centers — simply put, other people’s computers.
  The days of buying expensive software and worrying about insufficient equipment space are already Gone forever. Relying on Uber to take a taxi? Like to browse the photos of family and friends? Without the cloud, such applications cannot exist. “Although there is no storage in your phone, you can see that they exist in some data centers. “,” Linthicum said, “This is the beauty of’cloud’, because you don’t even know it is there. ”
  What is the most important thing? You don’t need to understand it to use it. You can leave this question to service providers such as Amazon, Google, IBM, and Intel, which have already invested in cloud computing for individuals and companies.” A lot of money.
The three-tier model of cloud computing

  From the perspective of technology and systems, the connotation of cloud computing should include the following 8 parts. The three levels corresponding to IaaS, PaaS, and SaaS constitute the basic technical architecture of the cloud computing system. It can be called the “three-tier model of cloud computing”, while cloud security, cloud quality, cloud standards, cloud operation and maintenance, and cloud Operation provides a global guarantee for the entire cloud computing system (also known as cloud service system). The organic combination of these eight parts ensures that the cloud service system can provide cloud users with high-efficiency and high-quality cloud services.
  Software as a service (SaaS)
  Software as a service mainly refers to various applications that can be directly used by cloud users. You interact most with this thing. It allows users to pay cloud service providers to completely handle the back-end part of their applications. Any public website that can be used as an application at the same time belongs to SaaS, such as Google Docs, Gmail and Microsoft 365.
  Infrastructure as a service (IaaS)
  mainly includes storage facilities, computing facilities and network facilities. This allows companies to rent the equipment needed to support the cloud. The company maintains control of its software, but leaves equipment, storage, and maintenance to IaaS providers such as Amazon Web Services, Microsoft Azure, Google Cloud Computing, and Alibaba.
  Platform as a service (PaaS)
  mainly includes development platform, operation management platform, etc. PaaS providers face software developers and provide remote platforms—no company’s own computers—to quickly build cloud services and applications that we all like. The engine yard is an example. Engine Yard is an example.
The origin of cloud computing

  Cloud computing does not come from a single event or individual. Several computer scientists in the 1950s and 1960s put forward their basic concepts, but what really led the cloud era was the rise of accessible high-speed Internet and the pursuit of efficiency in the first decade of this century. As for the name itself, some reports pointed out that Google and Amazon used the term cloud computing in 2006, and the “MIT Technology Review” discovered this term in the 1996 Compaq business plan.
  Running these cloud computing centers requires a lot of energy. There are more than 3 million data centers in the United States, which use enough energy to power 6.5 million households, accounting for almost 2% of the total energy consumption in the United States.

data center

  Around the world, data centers—some of them large enough to cover 10 football fields—accommodate thousands of computers called servers, acting as intermediaries. When you click on a post on Facebook, they will process your request and provide content.


  Storing data in the data cloud means giving control to “other people’s computers”, which is scary. But the cloud is safer than you think. Public providers like Google and Linux employ hundreds of people to maintain and protect data clouds. Therefore, your data is generally safer in the cloud than in the hands of smaller companies that keep the data locally. This is not to say that data clouds cannot be hacked; earlier in 2018, serious vulnerabilities called “ghosts” and “disasters” made headlines because they affected almost all computers, including servers.
  Many cloud providers will automatically convert your information into code before the data reaches the server, which is called encryption. If they don’t, you can find third-party tools online. As a standard rule of thumb, be sure to create a strong password to avoid being hacked. Linthicum said: “Security also depends on the wisdom of the people who have these accounts.”