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Managing Network File Systems in Oracle Solaris 11.1     Oracle Solaris 11.1 Information Library
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Document Information


1.  Managing Network File Systems (Overview)

2.  Network File System Administration (Tasks)

3.  Accessing Network File Systems (Reference)

NFS Files

/etc/default/nfslogd File

/etc/nfs/nfslog.conf File

NFS Daemons

automountd Daemon

lockd Daemon

mountd Daemon

nfs4cbd Daemon

nfsd Daemon

nfslogd Daemon

nfsmapid Daemon

Configuration Files and nfsmapid

Precedence Rules

nfsmapid and DNS TXT Records

Checking for the NFS Version 4 Domain

Configuring the NFS Version 4 Default Domain

Configuring an NFS Version 4 Default Domain in the Oracle Solaris 11 Release

Configuring an NFS Version 4 Default Domain in the Solaris 10 Release

Additional Information About nfsmapid

reparsed Daemon

statd Daemon

NFS Commands

automount Command

clear_locks Command

fsstat Command

mount Command

mount Options for NFS File Systems

Using the mount Command

umount Command

mountall Command

umountall Command

sharectl Command

set Subcommand

get Subcommand

status Subcommand

share Command

Non-File-System-Specific share Options

NFS-Specific share Options

Setting Access Lists With the share Command

unshare Command

shareall Command

unshareall Command

showmount Command

nfsref Command

FedFS Commands

Commands for Troubleshooting NFS Problems

nfsstat Command

pstack Command

rpcinfo Command

snoop Command

truss Command


How the NFS Service Works

Version Negotiation in NFS

Features in NFS Version 4

Unsharing and Resharing a File System in NFS Version 4

File-System Namespace in NFS Version 4

Volatile File Handles in NFS Version 4

Client Recovery in NFS Version 4

OPEN Share Support in NFS Version 4

Delegation in NFS Version 4

ACLs and nfsmapid in NFS Version 4

Reasons for ID Mapping to Fail

Avoiding ID Mapping Problems With ACLs

Checking for Unmapped User or Group IDs

Additional Information About ACLs or nfsmapid

UDP and TCP Negotiation

File Transfer Size Negotiation

How File Systems Are Mounted

Effects of the -public Option and NFS URLs When Mounting

Client-Side Failover

Failover Terminology

What Is a Replicated File System?

Failover and NFS Locking

Client-Side Failover in NFS Version 4

How NFS Server Logging Works

How the WebNFS Service Works

How WebNFS Security Negotiation Works

WebNFS Limitations With Web Browser Use

Secure NFS System

Secure RPC

DH Authentication

KERB Authentication

Using Secure RPC With NFS

How Mirror Mounts Work

When to Use Mirror Mounts

Mounting a File System Using Mirror Mounts

Unmounting a File System Using Mirror Mounts

How NFS Referrals Work

When to Use NFS Referrals?

Creating an NFS Referral

Removing an NFS Referral

Autofs Maps

Master Autofs Map

Mount Point /home

Mount Point /net

Mount Point /nfs4

Direct Autofs Maps

Mount Point /-

Indirect Autofs Maps

How Autofs Works

How Autofs Navigates Through the Network (Maps)

How Autofs Starts the Navigation Process (Master Map)

Autofs Mount Process

Simple Autofs Mount

Hierarchical Mounting

Autofs Unmounting

How Autofs Selects the Nearest Read-Only Files for Clients (Multiple Locations)

Autofs and Weighting

Variables in a Autofs Map Entry

Maps That Refer to Other Maps

Executable Autofs Maps

Modifying How Autofs Navigates the Network (Modifying Maps)

Default Autofs Behavior With Name Services

Autofs Reference

Autofs and Metacharacters

Ampersand (&)

Asterisk (*)

Autofs and Special Characters


How NFS Referrals Work

The Oracle Solaris 11.1 release includes a new NFS feature called NFS referrals. NFS referrals are a way for an NFSv4 server to point to file systems located on other NFSv4 servers, as a way of connecting multiple NFSv4 servers into a uniform namespace.

NFSv2, NFSv3 and other clients can follow a referral because it appears to them to be a symbolic link.

When to Use NFS Referrals?

NFS referrals are useful when you want to create what appears to be a single set of filenames across multiple servers, and you prefer not to use autofs to do this. Note that only NFSv4 servers may be used, and that the servers must be running the Oracle Solaris 11.1 release or later to host a referral.

Creating an NFS Referral

An NFS referral is created using the nfsref command. When a referral is created, if the mount point does not exist yet, a symbolic link is generated which includes a special flag which identifies object as a reparse point. If the reparse point already exists, NFS service data will be added or will replace existing NFS service data, as appropriate.

Removing an NFS Referral

An NFS referral is also removed using the nfsref command. It will remove NFS service data from the specified reparse point, and will remove the reparse point if there are no other types of service data present.