Follow NFS (policy attribute)
The (Network File System) attribute specifies whether NetBackup is to back up or archive any NFS-mounted files. These files are named in the backup selection list or by the user, in the case of a user backup or archive. Uncheck the box to prevent the backup or archive of NFS-mounted files.
Note:
This attribute applies only to UNIX clients in certain policy types. NetBackup allows it to be selected in those instances only.
This attribute eliminates the need to locate and log on to the systems where the files reside. If the files are mounted on the NetBackup client, you can back up, archive, and restore them by working from the NetBackup client. You must have the necessary permissions on the NFS mount. Use this capability to back up the systems that the NetBackup client software does not support.
Generally, do not back up NetBackup clients over NFS. Back up and archive files on the NFS server where the files physically reside. NFS backups have lower performance and sometimes encounter problems. If is selected, you may want to use the policy only for the files and clients that are backed up or archived over NFS.
Note:
If is not selected, the backup process reads the client's mount table and evaluates each item in the table. NetBackup resolves any links to the true path. NetBackup must resolve the links so it can accurately avoid backing up any files that reside on NFS-mounted file systems.
If NetBackup cannot access a Network File System when it evaluates the mount table, it assumes that the file system is unavailable. (The default time to access the file system is five seconds.) To change the default, change the UNIX master server host property, NFS_ACCESS_TIMEOUT in the usr/openv/netbackup/bp.conf file.
See NFS_ACCESS_TIMEOUT option for NetBackup clients.
Note:
NetBackup specifically excludes mapped directories even if Follow NFS and Cross mount points are enabled. To back up mapped directories, include the directories in the file list.
Consider the following before enabling this attribute:
Table: Issues that affect Follow NFS
| Item | Description |
|---|---|
|
(policy attribute) |
The behavior of Follow NFS can vary depending on how it is used in combination with . See Examples of using Cross mount points and Follow NFS in combination. |
|
Raw partitions |
This attribute has no effect on raw partitions. The Network File Systems that are mounted in a raw partition are not backed up. Nor can you back up raw partitions from other computers that use NFS mounts to access the raw partitions. The devices are not accessible on other computers through NFS. Note: NetBackup does not support raw partition backups on unformatted partitions. |
|
Automounted directories |
This attribute causes files in automounted file systems to be backed up. Automounted directories can be excluded to allow the backup of other NFS mounts. To do so, add an entry for the automounter's mount directory to the exclude list on the client. |