Help on Protocols > UNIX Sharing (NFS) > NFS Exports

The following information and controls appear on Protocols > UNIX Sharing (NFS) > NFS Exports:

Current Access Zone:
From this drop-down list, select the access zone in which you want to create or manage NFS exports.
NFS Exports
Displays the list of NFS exports available within the selected access zone. Click the check box corresponding to an export you wish to View/Edit or Delete.
Create Export
Click to create an NFS export.
Directory Paths
Lists directory paths you have assigned to the export. You can add multiple directory paths by clicking Add another directory path for each additional path.
Description
Enter a description of the export you are adding (optional).
Clients
Specifies one or more clients to be allowed access to the export. Access level is controlled through export permissions.
Always Read-Write Clients
Specifies one or more clients to be allowed read/write access to the export regardless of the export's access-restriction setting. This is equivalent to adding a client to the Clients list with the Restrict access to read-only setting cleared.
Always Read-Only Clients
Specifies one or more clients to be allowed read-only access to the export regardless of the export's access-restriction setting. This is equivalent to adding a client to the Clients list with the Restrict access to read-only setting selected.
Root Clients
Specifies one or more clients to be mapped as root for the export. This setting is equivalent to adding a client to the Clients list and mapping root users to the root username.
Permissions
Select Restrict access to read-only or Enable mount access to subdirectories, which allows subdirectories below the path(s) to be mounted.
Root User Mapping

Displays whether you have selected the default root user or a custom root user.

If you selected Use default, the default settings display in the field. The default settings establish a root-squashing rule for this export, which prevents users -- regardless of their credentials on the NFS client -- from gaining root privileges on the NFS server. The default settings are:
User: nobody 
Primary Group:  No primary group 
Secondary Group: No secondary groups

If you selected Use custom, the field expands and custom root user options display. If you select the Do not map failed user lookups radio button, no map root user is specified. If you select the Map failed user lookups to a specified user radio button:

User
Enter the name of the map root user, or click Browse to access a search window.
Primary Group
Enter the name of the primary group for the map root user, or click Browse to access a search window.
Secondary Groups
Click Add a group to access the Select a Group popup window, in which you can manually enter group names or search for them. You may specify multiple secondary groups.
Non-Root User Mapping
Displays whether you have specified a non-root user for the export. User mapping is disabled by default. Specify this setting on a per-export basis, when appropriate. If you select Use Custom, this field expands and the same fields used in the Map Root User custom screen display.
Failed User Mapping
Displays whether you have specified a non-root user for the export. User mapping is disabled by default. Specify this setting on a per-export basis, when appropriate. If you select Use Custom, this field expands and the same fields used in the Map Root User custom screen display.
Security Flavors
UNIX system security is the default. If you select Use Custom, you can also select Kerberos5, Kerberos5 Integrity and Kerberos5 Privacy.
Advanced Default Export Settings
To display advanced export settings, click Show Advanced Settings. We recommend that you do not change advanced settings unless it is necessary and you fully understand the consequences of these changes.
Block Size
The block size used to calculate block counts for NFSv3 FSSTAT and NFSv4 GETATTR requests. The default value is 8 KB.
Commit Asynchronous
If set to Yes, allows NFSv3 and NFSv4 COMMIT operations to be asynchronous. The default value is No.
Directory Transfer Size
The preferred directory read transfer size reported to NFSv3 and NFSv4 clients. The default value is 128 KB.
Read Transfer Max Size
The maximum read transfer size reported to NFSv3 and NFSv4 clients. The default value is 1 MB.
Read Transfer Multiple
The recommended read transfer size multiple reported to NFSv3 and NFSv4 clients. The default value is 512 bytes.
Read Transfer Preferred Size
The preferred read transfer size reported to NFSv3 and NFSv4 clients. The default value is 128 KB.
Readdirplus Prefetch
Do not use.
Setattr Asynchronous
If set to Yes, performs set attribute operations asynchronously. The default value is No.
Write Datasync Action
The action to perform for DATASYNC writes. The default value is DATASYNC.
Write Datasync Reply
The reply to send for DATASYNC writes. The default value is DATASYNC.
Write Filesync Action
The action to perform for FILESYNC writes. The default value is FILESYNC.
Write Filesync Reply
The reply to send for DATASYNC writes. The default value is FILESYNC.
Write Transfer Max Size
The maximum write transfer size reported to NFSv3 and NFSv4 clients. The default value is 1048576 bytes.
Write Transfer Multiple
The recommended write transfer size multiple reported to NFSv3 and NFSv4 clients. The default value is 512 bytes.
Write Transfer Preferred
The preferred write transfer size reported to NFSv3 and NFSv4 clients. The default value is 524288 bytes.
Write Unstable Action
The action to perform for unstable writes. The default value is UNSTABLE.
Write Unstable Reply
The reply to send for unstable writes. The default value is UNSTABLE.
Max File Size
Specifies the maximum file size to allow. This setting is advisory in nature and is returned to the client in a reply to an NFSv3 FSINFO or NFSv4 GETATTR request. The default value is 8 EB.
Readdirplus Enable
Enables the use of the NFSv3 readdirplus service, whereby a client can send a request and receive extended information about the directory and files in the export. The default is Yes.
Return 32 bit File IDs
Specifies return 32 bit file IDs to the client. The default is No.
Can Set Time
When this setting is enabled, OneFS allows the NFS client to set various time attributes on the NFS server. The default value is Yes.
Encoding
Overrides the general encoding settings the cluster has for the export. The default value is DEFAULT.
Map Lookup UID
Looks up incoming user identifiers (UIDs) in the local authentication database. The default value is No.
Symlinks
Informs the NFS client that the file system supports symbolic link file types. The default value is Yes.
Time Delta
Sets the server clock granularity. The default value is 1 nanosecond.