Administrator Guide

3. The NDMP server copies the NAS volume data to the DMA server.
4. After receiving the data, the DMA server moves the data to a storage device, such as a local disk or tape device.
5. After the backup completes, the NDMP server deletes the temporary snapshots.
NDMP Environment Variables
NDMP environment variables control the behavior of the NDMP server for each backup and restore session.
To determine whether the DMA server supports setting these environment variables, refer to the documentation for your DMA server. If
the DMA server cannot set a particular environment variable, the NDMP server operates with the default value.
The following table summarizes the supported environment variables.
Environment Variable Description Used In Default Value
TYPE Specifies the type of backup and restore application. The valid values
are:
• dump – NDMP server generates inode-based file history
• tar – NDMP server generates file-based file history
Backup
and
Restore
dump
FILESYSTEM Specifies the path to be used for the backup. The path must be a
directory.
Backup None
LEVEL Specifies the dump level for the backup operation. The valid values are 0
to 9.
Backup 0
HIST Specifies how file history is to be generated. The valid values are:
• d – Specifies that node/dir-format file history will be generated
• f – Specifies that file-based file history will be generated
• y – Specifies that the default file history type (which is the node/dir
format) will be generated
• n – Specifies that no file history will be generated
Backup y
DIRECT Specifies whether the restore is a Direct Access Retrieval. The valid
values are Y and N.
Backup
and
Restore
Y
UPDATE Specifies whether the dump level and dump time for a backup operation
should be updated on the NDMP server so that subsequent backups can
reference the dump level from previous backups. The valid values are Y
and N.
Backup Y
EXCLUDE Specifies a pattern for matching to directory and file names that are not
to be backed up. This environment variable is a list of strings separated
by commas. Each entry is matched against nodes encountered during
backup. The string can contain an asterisk (*) as the wildcard character,
but the asterisk must be the first or last character of the pattern. A
maximum of 32 comma-separated strings are supported.
Backup No exclude
pattern is
specified by
default
RECURSIVE Specifies whether the restore should be recursive. The valid values are Y
and N. If this environment variable is set to N, only files that are the
immediate children of the restore target are restored.
Restore Y
RESTORE_OVERWRITE Specifies whether the restore operation should overwrite existing files
with the backup data. The valid values are Y and N.
Restore Y
LISTED_INCREMENTAL Specifies whether an additional directory listing is added to the backup
stream during incremental backup so that the restore operation can
handle files and directories deleted between the incremental backups.
This environment variable controls behavior similar to the listed
incremental option of the tar application. The valid values are Y and
N.
During backup, if this variable is set to Y, an additional directory listing is
added to the backup data stream. Because of the additional processing
required, this option could impact the backup data stream size and
performance.
Backup
and
Restore
N
FluidFS Administration 417