vfs_tsmsm - VFS module for handling offline files with Tivoli Storage Manager
vfs objects =
This VFS module is part of the samba
The tsmsm VFS module is an extension for handling offline files with Tivoli
Storage Manager Space Management.
It tries to avoid calling expensive DMAPI calls with some heuristics based on
the fact that number of blocks reported of a file multiplied by 512 will be
bigger than 'online ratio' of actual size for online (non-migrated) files. If
heuristic check fails, the module calls DMAPI and asks for a specific
attribute which is present for offline (migrated) files. If this attribute
presents, the file is considered offline.
This module is not stackable.
tsmsm:hsm script = [ path to hsm script ]
hsm script should point to a shell script
which accepts two arguments: operation and filepath. the tsmsm module only
uses "offline" for operation to set the file under filepath
tsmsm:online ratio = [ number ]
Ratio to check reported size against actual
file size. The default value is 0.5.
tsmsm:dmapi attribute = [ attribute-name ]
Name of a DMAPI attribute that is present when
a file is offline. The default is "IBMobj" (which is what GPFS
tsmsm:dmapi value = [ value for the DMAPI attribute ]
Value that the DMAPI attribute should have for
the file to be considered offline. The default is empty (no value
A GPFS mount with TSM support can be exported via Samba as follows:
vfs objects = tsmsm gpfs
path = /test/gpfs_mount
This man page is correct for version 4.0 of the Samba suite.
The original Samba software and related utilities were created by Andrew
Tridgell. Samba is now developed by the Samba Team as an Open Source project
similar to the way the Linux kernel is developed.