FedFsNfsServer0.9
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A file server must convert the information stored in a junction into a list of locations that's in a format which is correct for the protocol clients are using to access the server (say, NFSv4). The server-side process of recognizing a junction and converting its contents is known as ''junction resolution''. | A file server must convert the information stored in a junction into a list of locations that's in a format which is correct for the protocol clients are using to access the server (say, NFSv4). The server-side process of recognizing a junction and converting its contents is known as ''junction resolution''. | ||
| - | This article describes how to configure a Linux NFS server to resolve junctions. | + | A single junction is useful for linking together two shared file systems. A web of junctions can be used to create a namespace that crosses between multiple file systems on multiple file servers. FedFS uses junctions for just such a purpose. |
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| + | This article describes how to configure a Linux NFS server to resolve junctions. Once a file server can resolve junctions in its local file systems, it can participate in a FedFS domain. | ||
== Prepare mountd to resolve junctions == | == Prepare mountd to resolve junctions == | ||
Revision as of 16:32, 17 October 2012
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Project: fedfs-utils
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Introduction
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. Each replica of the linked-to file system is called a location.
Junctions store a list of locations. Each location in the list is represented as an export path paired with a server name or IP address. When a file-access client encounters a junction, the file server (via a referral) provides the stored list of locations to the client, who chooses a location and mounts it.
A file server must convert the information stored in a junction into a list of locations that's in a format which is correct for the protocol clients are using to access the server (say, NFSv4). The server-side process of recognizing a junction and converting its contents is known as junction resolution.
A single junction is useful for linking together two shared file systems. A web of junctions can be used to create a namespace that crosses between multiple file systems on multiple file servers. FedFS uses junctions for just such a purpose.
This article describes how to configure a Linux NFS server to resolve junctions. Once a file server can resolve junctions in its local file systems, it can participate in a FedFS domain.
Prepare mountd to resolve junctions
- rpc.mountd updated with junction support (nfs-utils 1.2.6 or later, built with the nfs-plugin.h header present)
- libnfsjunct.so installed (fedfs-utils package install, or built from source)
Install the nfsref command
- nfsref program installed (fedfs-utils package install, or built from source)
