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

message displays. If, however, you specify the -o qio option, the mount command
prints an error and terminates without mounting the file system.
VxFDD: You don't have a license to run this program
vxfs mount: Quick I/O not available
Depending on whether you create a new database or convert an existing database
to use Quick I/O, you have the following options:
To create a new Sybase database:
■ Use the qiomkfile command to preallocate space for database files and make
them accessible to the Quick I/O interface.
See “Creating database files as Quick I/O files with qiomkfile ” on page 59.
■ Use the setext command to preallocate space for database files and create
the Quick I/O files.
See “Preallocating space for Quick I/O files using the setext command”
on page 58.
To convert an existing database:
■ Create symbolic links for existing VxFS files, and use these symbolic links to
access the files as Quick I/O files.
See “Accessing regular VxFS files as Quick I/O files” on page 62.
■ Convert your existing Sybase database files to use the Quick I/O interface using
the qio_getdbfiles and qio_convertdbfiles commands.
See “Converting Sybase files to Quick I/O files” on page 64.
Preallocating space for Quick I/O files using the setext
command
As an alternative to using the qiomkfile command, you can also use the VxFS
setext command to preallocate space for database files.
Before preallocating space with setext, verify the the following conditions are
met:
■ The setext command requires superuser (root) privileges.Prerequisites
■ You can use the chown command to change the owner and group
permissions on the file after you create it.
See the setext (1M) manual page for more information.
Usage notes
Improving Sybase performance with Veritas Quick I/O
Preallocating space for Quick I/O files using the setext command
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