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In computing, file virtualization is a field of storage virtualization operating on computer file level. It involves uniting multiple storage devices into a single logical pool of file. It is a vital part of both file area network (FAN) and network file management (NFM) concepts.
File-based virtualization can be used to create a virtual file server (or virtual NAS device), which is a storage system that appears to the user as a single file server but which is actually implemented as a set of files stored on a number of physical file servers.
Virtual file system: an abstraction layer on top of a more concrete file system, allowing client applications to access different types of concrete file systems in a uniform way Storage hypervisor : the software that manages storage virtualization and combines physical storage resources into one or more flexible pools of logical storage [ 29 ]
A file system must be applied on top of the block-level storage to map 'files' onto a sequence of blocks. Amazon EBS (elastic block store) is an example of a cloud block store. [ 2 ] Cloud block-level storage will usually offer facilities such as replication for reliability, or backup services.
Software-defined storage typically includes a form of storage virtualization to separate the storage hardware from the software that manages it. [1] The software enabling a software-defined storage environment may also provide policy management for features such as data deduplication, replication, thin provisioning, snapshots and backup.
A virtual file system (VFS) or virtual filesystem switch is an abstract layer on top of a more concrete file system.The purpose of a VFS is to allow client applications to access different types of concrete file systems in a uniform way.
In computing, a virtual file server is a system consisting of one or more virtualized devices that store computer files such as documents, sound files, photographs, movies, images, or databases. The server can be accessed by workstations or application servers through the Virtual Fileserver Network (VFN).
A virtual tape library (VTL) is a data storage virtualization technology used typically for backup and recovery purposes. A VTL presents a storage component (usually hard disk storage) as tape libraries or tape drives for use with existing backup software.