Briefly describe the three levels of cloud

SaaS and cloud computing debate is growing, as if the two giants in the IT industry Microsoft and IBM, cloud computing includes three levels: the infrastructure layer (IaaS); platform layer (PaaS); software service layer SaaS). Although there are many controversies about this approach, cloud computing has SaaS as one of the aspects compared to the more mature SaaS concept, which shows that cloud computing is going to borrow SaaS as one of the ways to get started. As we all know, .

In the past, cloud computing in the narrow sense was generally seen as a collection of server, storage and network resources that were provided to users' cloud computing services through a collection of these computing resources. When companies such as Google and Microsoft that started out with the Internet and software plunged into the cloud computing arena, the concept of cloud computing is beginning to expand. As a result, software is being delivered to users over the Internet as a service and has also been incorporated into cloud computing.

In fact, the development of cloud computing and SaaS quite some different means, but the concept of cloud computing is relatively large. As a SaaS representative, Salesforce's Web-based CRM solution is the quintessential SaaS offering for sales, service, marketing, and call center operations. Eight hundred domestic leaders in this area is clearly a successful replicator of Salesforce, but now both companies are moving to the cloud computing.

Soon after Salesforce launched the Force.com PaaS platform, eight hundred customers launched its first domestic PaaS platform, the 800APP. Some software vendors are now starting to build and integrate with the 800-seat PaaS platform. This fully demonstrates that although 800 customers started out as SaaS, 800 customers did not define themselves as pure SaaS vendors. Having achieved some success in the SaaS and PaaS businesses, they also started to work on cloud computing Eager to try. Eight hundred passengers hope that the future of the company's business can move closer to cloud computing.

Li Zhi, the founder of eight hundred customers, believes that SaaS vendors are more focused on software development and have weaker network resource management capabilities, often wasting a lot of money on infrastructure like server and bandwidth purchases. However, the users provided The number is very limited, and cloud computing will be all the computing resources together, and automatically managed by the software, without human involvement. This eliminates the need for application providers to worry about tedious details, be more focused on their business, be innovative and reduce costs. SaaS providers no longer waste their resources on infrastructures such as servers and bandwidth but focus on specific software development and applications to achieve a win-win situation for end users, SaaS and cloud computing.

Whether it's Hewlett-Packard, IBM's three-tier cloud computing architecture or the cloud computing and SaaS offer of eight hundred customers seem to confirm one thing: cloud computing wants to bring its services to the ground and provide richer Products and services, always inevitable also borrowed SaaS form to present, and SaaS want to better deliver to users, and provide continuous service assurance, the same can not be separated from cloud computing support.