Many it giants have been reluctant to accept the "open source" approach. But with the development and popularization of cloud computing, the "open source movement" of it has been raging, and the open source cloud platform seems to be becoming more and more trend. At present, some open source cloud platform is quietly formed in cloud computing grass-roots, such as the OpenStack and VMware launched by NASA and Rackspace, and Cloudfoundry,openstack are actually IAAS components, Allow anyone to build and provide cloud computing services on their own, while Cloudfoundry is the industry's first open source PAAs cloud platform. The emergence of these open-source cloud platforms has brought a new impact on the cloud computing field, although many companies that advocate patent closure still have some "disdain" for this, but the "open cloud" has apparently gradually come into the public eye. Many companies have recognized the power of "open source", and IBM has openly expressed its support for open source cloud computing. According to an understanding, IBM management Software standards and Cloud Lab vice President Angeldiaz in Monday in Santa Clara, California, held in a speech in Platformcf, said that any "technology using patented technology merchants" can not quickly develop technology, and therefore cannot catch up with the development of various open source cloud technology pace. "IBM is 100% to support the open cloud," he said. If you don't join in, you will be eliminated by the world of innovation. In fact, it is not only IBM that notes the importance of "open source". It is understood that, back in the summer of 2008, at a meeting of Microsoft, which had always advocated "closed source", Gates had made it very emphatic that Microsoft needed to support open source software. It can be seen that the "open source" trend has already penetrated the entire IT industry, but the real acceptance and change for most enterprises, especially the giant enterprises, still need time. Open source cloud computing platform has many advantages, will make the choice of enterprises more free autonomy, open source of course will also become a major competitive advantage, but there are many problems are open source can not solve. Open source cloud computing platform want to get more enterprise's favor and the acceptance of the manufacturer, it seems to be still time.