Cloud Computing-The ten most popular science knowledge you must master

Cloud computing This new term has been rampant recently, many friends have been talking around, it is necessary to write a science about cloud computing.

The general industry prefers to use some of the term to reflect their strategic vision and the opponent's partition. When Google introduced the concept of cloud computing a few months ago, Amazon said it was cloud computing, and IBM, Intel and Sun all claimed to have deep plans for the cloud. Unfortunately, we still do not know what is cloud computing, still foggy know this is related to the calculation, simply called "Cloud computing" bar.

What does cloud computing really mean?

This question is not easy to answer, a professional answer is: cloud computing is relying on strong computing power, so that tens of thousands of end-users do not worry about the use of computing technology and access to the system can effectively rely on the network to connect the hardware platform to carry out the calculation of the ability to implement a variety of applications.

The unprofessional answer is that a bunch of hardware and software you don't need to figure out is serving you. This heap of hardware and software composed of Dongdong big like a cloud, but also has a strong computational power, this is called cloud computing.

So how does cloud computing come from? Why do we need cloud computing?

1. Cloud computing is the predecessor of Grid computing.

Speaking of the grid computing may know a lot of people, is the traditional grid computing. Grid computing is to split a calculation into fragments, submitted to the network system on each computer (grid point), the work done to complete the summary. More popular software such as Globe Bus + AFS (provides storage mapping service). However, grid is generally used in academia, for example, several experiments at CERN have adopted large-scale grid computing, such as the discovery of new particles, the need to deal with T-level data, the operation and storage of a single computer is obviously impossible to complete, so you must use grid computing.

2. Is there a real example of cloud computing?

Luckily, we can also find a few: Google Appengine,amazon's S3+EC2 system is the embryonic form of cloud computing.

3. What is the basis of cloud computing?

The most basic requirements: Storage + processor, of course, to support countless application requests and to ensure storage and computing performance, both are challenges.

4. Can I build a cloud computing environment myself?

Of course, we can use open source projects to build a cloud computing environment: You can use hadoop+hbase+php (Packaging API) to realize a simple cloud computing environment.

5. Is there a simpler example?

Maybe a distributed messaging system is a prototype of cloud computing: computing is distributed across nodes, and applications (mail delivery) are handled by a unified platform, which is a definition of cloud computing, but can only support the simplest of fixed applications.