Cloud storage is in a cloud computing (cloud computing) extensions on the concept and development of a new concept, is refers to the application through the cluster, grid technology and distributed file systems, and other functions, the network of a large number of various types of storage devices set up by applying the software to work together, common external provide access to data storage and business functions of a system, when the cloud computing system operation and processing is the core of a large amount of data storage and management, cloud computing system will need to configure a large number of storage devices, cloud computing system is transformed into a cloud storage system, so the cloud storage is a data storage and management as the core of cloud computing systems, cloud computing involves several layers, the concept of the impact on the market at present the basic cloud computing refers to the IT infrastructure, the so-called IaaS,
In a nutshell, it first using the new technology of the underlying hardware resources (such as CPU, memory, hard disks, network interfaces, etc.) together into a resource pool, and then according to the user's specific needs to extract resources, packaged combination of a complete set of service meet the requirements of virtual environment, use the virtual machine environment and real environment feel exactly the same, according to their needs and resources can be flexible expand or shrink,
One of the benefits, isolation the software and hardware, reduce the reliance of the software for a specific device,
Benefit another, integrate the hardware resources, improve the overall efficiency, greatly simplifies the complexity of the IT system maintenance,
One of the problems, if build the cloud is too small, energy saving, economic indicators such as investment yield is not significant,