Andrew File System in Distributed System : What is Andrew File System ? : AFS in Distributed System скачать в хорошем качестве

Andrew File System in Distributed System : What is Andrew File System ? : AFS in Distributed System

This Lecture will support you to understand the concept of Andrew File System in Distributed System. What is Andrew File System ? and how it works in easy way. Concept of Andrew File System(AFS) : The Andrew File System (AFS) is a location-independent file system. AFS is a flash drive that you need not to carry whenever you go, instead it’s available to you through the internet. It is a Distributed file system which uses a set of trusted servers to present a homogeneous, location-transparent file name space to all the client workstations. (Vice).  By AFS, people can work together on the same files, no matter where the files are located. AFS users do not have to know which machine is storing a file. AFS is a Distributed file system which make easy to access a files stored on a remote computer as files stored on the local disk. All the files, you store on the AFS is available to use online by just connecting to you AFS server. We can connect with AFS server through an AFS client. In AFS, the server keeps track of which files are opened by which clients (as was not in the case of NFS). The key software components in AFS : Vice: The server side process that resides on  top of the Unix kernel. It provides shared file services to each client. Venus: The client side cache manager which acts as an interface between the application program and the Vice.  All files in AFS are distributed among the servers. The set of files in one server is referred to as a volume. In case a request can not be satisfied from this set of files, the vice server informs the client where it can find the required file. Features of AFS: File backup : AFS data files are backed up nightly. Backups are kept on site for six months. File security : AFS data files are protected by the Kerberos authentication system. Physical Security : AFS data files are stored on servers located in the UCSC Data Center. Reliability and availability: The AFS servers and storage are maintained on redundant hardware. Authentication: AFS uses Kerberos for authentication.   Kerberos accounts are automatically provisioned for all UCSC students, faculty and staff.   Space to User (Quota) : AFS provides 500 MB space per user and can request to increase automatically up to 10GB. quota increase can be requested through the ITS Support Center. (This is scripted to run several times daily; the quota increase is not instantaneous.) for more video subscribe the channel : Computer science academy by Dinesh Sir.