After “cloud computing” emerges, more and more service providers release cloud computing services, and more and more users use cloud computing services and enjoy core benefits brought by cloud computing: low-cost construction business.
A cloud storage service is a cloud computing mode that uses storage space as resources and allows a user to use the storage space as required, without worrying the depletion of storage space on an information technology (Information Technology, IT) device. The appearance of a large number of cloud storage services makes it possible to construct a low-cost file storage system.
Constructing a file storage system directly on the basis of the capability provided by a shared cloud storage service is the simplest scheme, but for an enterprise, the top concern is security and reliability of data assets. However, facts prove that the actual performance of each cloud storage service falls short of users' expectations. Therefore, private cloud storage is currently a mainstream scheme to construct a file storage system by using the cloud storage technology.
Private cloud storage, built upon an enterprise's infrastructure, is open only to internal users of the enterprise. Therefore, the enterprise has the control right of the storage system and can reuse the enterprise's existing storage resources to a certain extent. Private cloud storage is a complex system formed by multiple portions including networks, storage devices, servers, application software, public access interfaces, and client programs. The portions use storage devices as the core and externally provide data storage and a business access service through application software. The construction of such a private cloud storage system requires an enterprise to provide sufficient storage devices that can be virtualized and sufficient sites, to set up a network for connecting the storage devices, and then to deploy, in one by one mode, templates to run at the infrastructure layer, management layer, and application interface layer on the network. Therefore, it can be seen that the construction of a private cloud storage system is complex and implementation is relatively difficult.