FedFsGlossary

From Linux NFS

Contents 1 Project: fedfs-utils 2 Introduction 3 Glossary 3.1 Domain Root Directory 3.2 FedFS Domain 3.3 Globally Useful Name 3.4 Junction 3.5 Junction Resolution 3.6 Location 3.7 Namespace Database 3.8 Referral

Project: fedfs-utils

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Introduction

This article contains a glossary of terms related to FedFS.

Glossary

Domain Root Directory

A domain root directory is the top-level directory of a FedFS domain.

FedFS Domain

A FedFS domain is a file name space that can cross multiple shares on multiple file servers.

Globally Useful Name

The Globally Useful Name is a pathname in the FedFS domain namespace which is the same no matter which client is used to access the file.

Junction

A junction is a link between two shared file systems. The two shared file systems may not reside on the same server. There may be more than one replica of the linked-to shared file system, stored on several different file servers. Junctions store a list of locations.

Junction Resolution

The process where a file server converts the contents of a junction to a list of locations that can be used during a referral.

Location

Each replica of the linked-to file system is called a fileset location, or location, for short. A location is represented as an export path paired with a server name or IP address.

Namespace Database

The Namespace Database, also known as the NSDB, is a central repository of FedFS domain namespace information that is shared among all file servers in a FedFS domain.

Referral

A referral event occurs when a file server reports to a client that the object (typically a directory) it is trying to access has moved. The client responds by requesting a list of locations where it can find the object.