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

To show a Quick I/O file resolved to a raw device
◆
Use the ls command with the file names as follows:
$ ls -alL filename .filename
The following example shows how the Quick I/O file name dbfile is resolved
to that of a raw device:
$ ls -alL d* .d*
crw-r--r-- 1 sybase sybase 45, 1 Oct 2 13:42 dbfile
-rw-r--r-- 1 sybase sybase 104890368 Oct 2 13:42 .dbfile
Extending a Quick I/O file in a Sybase environment
Although Quick I/O files must be preallocated, they are not limited to the
preallocated sizes. You can grow or “extend” a Quick I/O file by a specific amount
or to a specific size, using options to the qiomkfile command. Extending Quick
I/O files is a fast, online operation and offers a significant advantage over using
raw devices.
Before extending a Quick I/O file, verify the following conditions are met:
■ You must have sufficient space on the file system to extend the
Quick I/O file.
Prerequisites
■ You can also grow VxFS file systems online (provided the
underlying disk or volume can be extended) using the fsadm
command. You can expand the underlying volume and the file
system with the vxresize command.
■ You must have superuser (root) privileges to resize VxFS file
systems using the fsadm command.
■ For Sybase: you have the ability to extend a Quick I/O file, you
cannot resize a database device in Sybase once it is initialized.
However, with the ability to grow the volumes and file systems
online, you can easily allocate new database devices to be used for
new segments and to extend existing segments.
■ See the fsadm_vxfs (1M) and qiomkfile (1M) manual pages for
more information.
Usage notes
The following options are available with the qiomkfile command:
Extends the file by a specified amount to allow Sybase resizing.-e
Improving Sybase performance with Veritas Quick I/O
Extending a Quick I/O file in a Sybase environment
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