By default, you must have superuser (root) privileges to use the /opt/VRTS/bin/vxtunefs command. The vxtunefs command is a tool that lets you change caching policies to enable Cached Quick I/O and change other file system options. Database administrators can be granted permission to change default file system behavior in order to enable and disable Cached Quick I/O. The system administrator must change the vxtunefs executable permissions as follows:

# chown root /opt/VRTS/bin/vxtunefs
# chgrp dba /opt/VRTS/bin/vxtunefs
# chmod 4550 /opt/VRTS/bin/vxtunefs

Setting the permissions for /opt/VRTS/bin/vxtunefs to 4550 allows all users in the dba group to use the vxtunefs command to modify caching behavior for Quick I/O files.

For more information, see the Veritas File System Administrator's Guide.