Thursday, October 14, 2010

Amazon: the "cloud" dance



May not be long before Amazon will no longer just a B2C company, but the important cloud computing service providers. Not long ago, re-examine China's cloud computing solutions and network services, said Jeff Barr, Senior Manager, so far, Amazon cloud computing log volume has exceeded its related page in the retail traffic, there are 52 billion objects inside the Amazon cloud computing system for data exchange.

Amazon's cloud computing services such a large, in fact, many years ago from an "unintentional." Six years ago, the Amazon sales peak in response to the additional purchase of IT equipment, to build their own e-commerce system IT architecture, realized that those facilities are often idle, they begin to use idle equipment with other companies provide storage server, bandwidth, CPU resources development application rental business ideas. This is Amazon's original concept of cloud computing.

Since 2004, Amazon launched a simple queue service, Mechanical Turk and other cloud computing services prototype. Jeff Barr said that Amazon's cloud computing services, a sign of maturity is in 2006 a simple storage service (S3) and Elastic Cloud (EC2), which provides customers lease a virtual execution environment for users to develop, test or perform their application, and customers can choose the specifications of each execution environment, covering the memory space, computing units and storage space; Not long ago, Amazon announced Amazon Elastic Compute Cloud (EC2) beta of new properties, which Amazon cloud monitoring (Cloud Watch) is a monitoring AWS cloud resources, network services, automated measurement (Auto Scaling) allow EC2 capacity on demand to increase or decrease, elastic load regulation (ElasticLoadBalancing) is calculated in the EC2 instance distribution of traffic between these new features intended to make the Amazon cloud application users to use more simple and workable.

Jeff Barr believes that cloud computing is the different levels and types, each provided cloud computing services are not the same, Amazon is the IT infrastructure cloud computing services. Demand on the network connected directly to the bottom is the Amazon's IT infrastructure, AWS (Amazon Web Services), including computing, storage, content distribution, etc.; in AWS basis, users can build their own application layer These application layer, including building the database, application server; top layer is the application software. He said that many cloud computing market services provided by service providers, only part of solution at different levels.

Professional IT company to provide cloud computing services, inevitably limited to provide their own system on top, limiting flexibility; Amazon's role is very special - it is not IT systems makers, but those who use. Jeff Barr special mention, because Amazon itself is also a cloud computing user, so it's not just sold to business users of cloud computing technology, also has its own lessons, which can help businesses better use of cloud computing services to create greater value.

"We opened up the infrastructure, database and application server and the application of information, including all platforms, unlike other companies, the application level is only open platform." Jeff Barr said that Amazon provides a more complete opening of cloud computing platform, except for some small and medium enterprises and individual developers to provide services, Amazon's cloud services have also attracted a lot of IT companies to join the cloud computing. Last year in September, Oracle announced that Amazon EC2 customers can perform OracleDatabase11g, Oracle Fusion Middleware and Oracle Enterprise Manager and other software, but without additional charge; last November, hosted service pioneer Salesforce.com announced the integration of Force.com, Amazon cloud computing and storage platforms, developers can also access sides of platform resources; recently IBM also said it would in the Amazon EC2 cloud service providing IBM related products, include IBM DB2, Informix Dynamic Server, WebSphere Portal, and Novell's SUSE Linux operating system and so on. Although Amazon has not disclosed its cloud computing services on the specific revenue, but the industry claimed that the income of 1 billion U.S. dollars.

Currently, Amazon has plans to cloud computing's reach extended to China, "we are not exactly the timetable for Huan, but Amazon HQ has on Zheyi market has attracted much attention. Zhiyu when to enter, we need to follow the appropriate policies and regulations. "Jeff Barr said.







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Friday, October 8, 2010

Command line "" and "-" symbol represents the meaning of



If the end of the line is that it is not our end, the following line, and the Bank was a means.

- Is the option to start a letter option generally used - at the beginning, a number of letters to use - at the beginning.

"" If after the carriage return, line feed, then do not be omitted; But if the other characters, it can not be omitted.

"" Tell the system followed by the characters as intended, not an order.

For example there is the file name with spaces, it is necessary add a space before the "."







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