Veritas File System 5.0.1 Release Notes

SmartMove provides the following benefits:
— Less I/O is sent through the host, through the storage network, and to the disks or LUNs.
— Faster plex creation results in faster array migrations.
— Ability to migrate from a traditional LUN to a thinly provisioned LUN. This removes
unused space in the process.
In this release, the SmartMove feature is turned off by default. You can enable this feature
by specifying the usefssmartmove=on option in the /etc/default/vxsf file. To use
the SmartMove feature, VxVM and VxFS version 5.0.1 or later is required.
NOTE: The Smartmove feature is available only with the SG-SMS license.
• Dynamic Storage Tiering Enhancements
The Dynamic Storage Tiering (DST) feature provides the following enhancements:
— Enhanced DST APIs to provide a new interface for managing allocation policies of
storage checkpoints during creation and later, and for managing named data stream
allocation policies.
— fsppadm support for user ID (UID), group ID (GID), and tagging (TAG) elements in
the placement policy XML file.
— Improved scan performance in the fsppadm command
— Suppressed processing of the chosen RULE.
— Parser support for UID, GID, and TAG elements in a DST policy
— Storage Checkpoint data placement support in a DST policy
— Shared DB thread handle support
— CPU and I/O throttling support for DST scans
— New command, fstag, for file tagging
— New command, fsppmk, for creating XML policies
NOTE: To ensure proper functioning of DST enhancements with databases, upgrade the
SQLite version to 3.3.9 or later.
The DST feature is available only with the SG-SMS license.
• Availability of the mntlock and mntunlock Mount Options
You can specify the mntlock option with the mount command to prevent a file system
from being unmounted by an application. This option is useful for an application to prevent
file systems (that it monitors) from being improperly unmounted by other applications or
administrators. The mntlock option is useful particularly for clustering applications where
multiple file systems are monitored by different applications or administrators.
The mntunlock option of the vxumount command disables the mntlock operation if you
previously locked the file system.
6 Veritas File System 5.0.1 Release Notes