Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

■ 5-9KB - hole

■ 9-10KB - data block

So a 1TB file system can potentially store up to 2TB worth of files if there are

sufficient blocks containing zeroes. Quick I/O files cannot be sparse and will

always have all blocks specified allocated to them.

Displaying Quick I/O status and file attributes

You can obtain and display information about Quick I/O status and file attributes

using various options of the ls command:

Lists all files on a file system, including Quick I/O files and their links.-al

Shows if Quick I/O was successfully installed and enabled.-1L

Shows how a Quick I/O file name is resolved to that of a raw device.-a1L

To list all files on the current file system, including Quick I/O files and their links

◆

Use the ls -al command with the file names:

$ ls -al filename .filename

The following example shows how to use the -a option to display the absolute

path name created using qiomkfile:

$ ls -al d* .d*

-rw-r--r-- 1 db2inst1 db2iadm1 104890368 Oct 2 13:42 .dbfile

lrwxrwxrwx 1 db2inst1 db2iadm1 19 Oct 2 13:42 dbfile ->

.dbfile::cdev:vxfs:

Improving DB2 performance with Veritas Quick I/O

Displaying Quick I/O status and file attributes