This paper first introduces the basic concepts of related technologies and cloud storage, and then analyzes the architecture and components of cloud storage platform which is compatible with Amazon S3. And particularly shows the implementation of CAS (Content Addressable Storage) which also needs to communicate with S3 server. S3fs (Amazon S3-based file system, which called S3fs) is developed through the frame of FUSE based on Amazon S3. The communication between CAS and S3 is transparent for users. S3fs also take the management of chunked file indexed by hash value, which could reduce the consumption of bandwidth caused by synchronization.
