Veritas File System 5.1 SP1 Administrator"s Guide (5900-1499, April 2011)

# /usr/sbin/mount -F vxfs -o cio special /mount_point
■ special is a block special device
■ /mount_point is the directory where the file system will be mounted.
For example, to mount a file system named /datavol on a mount point named
/db2data:
# /usr/sbin/mount -F vxfs -o cio /dev/vx/dsk/db2dg/datavol \
/db2data
Enabling Concurrent I/O on a DB2 tablespace
Alternately, you can enable Concurrent I/O on a new DB2 tablespace by using the
db2 -v command.
To enable Concurrent I/O on a new DB2 tablespace
1
Use the db2 -v "create regular tablespace..." command with the no
file system caching option when you create the new tablespace.
2
Set all other parameters according to your system requirements.
To enable Concurrent I/O on an existing DB2 tablespace
◆
Use the DB2 no file system caching option:
# db2 -v "alter tablespace tablespace_name no file system caching"
tablespace_name is the name of the tablespace for which you are enabling
Concurrent I/O.
To verify that Concurrent I/O has been set for a particular DB2 tablespace
1
Use the DB2 get snapshot option to check for Concurrent I/O:
# db2 -v "get snapshot for tablespaces on dbname"
dbname is the database name.
2
Find the tablespace that you want to check and look for the File system
caching attribute. If you see File system caching = No, then Concurrent
I/O is enabled.
Disabling Concurrent I/O
If you must disable Concurrent I/O, unmount the VxFS file system and mount it
again without the mount option.
75Veritas File System I/O
Enabling and disabling Concurrent I/O for a DB2 database