Veritas File System 4.1 Release Notes (5900-0592, March 2010)

Table 1-3 Application Programming Interfaces (API) for MVS (continued)
DescriptionMVS API
Adds the volume specified by volname to a multi-volume file system
as free space.
vxfs_vol_add()
Removes the volume specified by the argument volname to the file
system, making the existing data in the volume available in the file
fname.
vxfs_vol_deencapsulate()
Adds the volume specified by the argument volname to the file system,
making the existing data in the volume available in the file fname.
vxfs_vol_encapsulate()
Fills in the array fsdev_info structures with information on the
component volumes in a file system.
vxfs_vol_enumerate()
Removes the component volume with the specified volume volname
from the file system. The file descriptor fd can specify any file in the
file system.
vxfs_vol_remove()
Changes the amount of space available to a file system in a component
volume specified by the volume volname. The size of the new
component volume must be at least the same as mentioned in the
argument newsize (specified in bytes).
vxfs_vol_resize()
Return free space information about a component volume within a
multi-volume file system.
vxfs_vol_stat()
• Quality of Storage Service
The Quality of Storage Service (QoSS) service is built on top of the multi-volume support
technology for storage tiering. Using QoSS, policies can be configured, that automatically
relocates files from one device to another. You can also relocate files can using relocation
commands. Having multiple devices improves performance for applications that access
specific types of files. QoSS is managed using the Veritas Enterprise Administrator (VEA)
GUI, or the fssweep, fsmove and fsrpadm commands. See ““Product Licensing (Currently
not available)”? for more information on licensing support for this feature.
The following commands are associated with QoSS:
fsmove The fsmove command relocates files between components of a multi-volume
file system.
fssweep The fssweep command traverses the directory structure of one or more file
systems, selecting files that meet criteria specified in the relocation policies.
fsrpadm The fsrpadm command administers Veritas File System relocation policies.
This command can be used only on a VxFS file systems with multi-volume
support enabled.
• Storage Checkpoint Quotas
You can set usage limits on Storage Checkpoints. The fsckptadm utility performs
administrative tasks, such as creation, deletion, and conversion, on a Storage Checkpoint of
a specified Veritas File System. See ““Product Licensing (Currently not available)”? for
more information on licensing support for this feature. The following keywords are supported
with the fsckptadm command:
setquotalimit Sets the hard limit and soft limit for Storage Checkpoint quotas.
Limits are set in terms of file system blocks. If the specified value
is zero, the maximum number of file system blocks is the limit.
getquotalimit Displays current quota limits, current usage, and any flags set
with setquotalimit keyword.
quotaon/quotaoff Turns Storage Checkpoint quotas on and off.
Features Requiring Additional Licenses (Currently not available) 11