The Research Of Network Based File System

With the development of informational society, more and more information is stored with electronic style. The dramatically increasing data resource brings great challenges for storage system of Internet server. Storage technology is developed so fast that the storage market will become bigger and bigger. As the applications based on Internet, such as electronic business, e-mail services and custom resource management (CRM) etc. G2NFS offers a perfect solution of these requirements,which is developed on Global Distributed Storage System(GDSS).G2NFS builds a global name space, which has the goodness of single name space and multiple name space, and offers all users the same mechanism file name, location and access. It provides different data views with the different interest of the users.G2NFS has distributed meta data servers, which uses domain and group to make users share their data conveniently. G2NFS has the mechanism that the transportation of the command and the transportation of useful data have different ways, which makes the servers be more powerful.G2NFS has the self-adoptive mechanism, which uses normal or slice transportation when a file is larger. When there are many small files, it makes several small files be one socket, which increases the efficiencies of transportation. In order to protecting data not be destroyed, G2NFS snap-shot technology can keep file system backup at one moment, which spends the shortest time and the smallest space in making read-only backup. Meta data provides the storage structure on storage devices, file system snap-shot can be founded by recording the state of the file system metadata.G2NFS has the functions which the normal file system has; it also has the special functions such as a united user logical view, tri-transactions etc. With the test result, G2NFS has the excellent performance in large of small files and super files transaction.