SAAS APPLICATION - RUNNING LARGE SCALE APPLICATION IN LIGHTWEIGHT CLOUD WITH STRONG PRIVACY PROTECTION.

Web has become an open platform, where everybody can build and run and deploy the applications. If a small company or a user wants to supply web services, it is better for them to rent the computing infrastructure. Infrastructureas-a-Service (IaaS) is the delivery of computer components such as servers, network, hardware, storage, computing power, etc. The customer is charged just for the resources consumed like utility-based computing. Virtualization may be a technique to implement cloud computing resources like platform, application, storage, and network. The beauty of virtualization solutions is that you simply can run multiple virtual machines (VM) simultaneously on one computer. Cloud Native, the emerging computing infrastructure has become a replacement trend for cloud computing, especially after the event of containerization technology like docker, and therefore the orchestration system for them like Kubernetes and Swarm. With the growing popularity of Cloud Native, the subsequent problems are raised: (i) most Cloud Native applications were designed for creating full use of the cloud platform, but their file storage system has not been optimized for adapting it. (ii) the normal filing system is meant as a utility for storing and retrieving files, usually built into the kernel of the operating systems. But when placing it to a largescale condition, sort of a network storage server shared by thousands of computing instances, and storing many files, it gets slow and even unstable. (iii) most storage solutions use metadata for faster tracking of files, but the metadata itself will take up tons of space, and therefore the capacity of it is usually limited. If the filing system store metadata directly into hard disc without caching, the tracking of massive small files are going to be slower. [ABSTRACT FROM AUTHOR]