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

Improving Sybase

performance with Veritas

Quick I/O

This chapter includes the following topics:

■ How to set up Quick I/O

■ Preallocating space for Quick I/O files using the setext command

■ Creating database files as Quick I/O files with qiomkfile

■ Accessing regular VxFS files as Quick I/O files

■ Converting Sybase files to Quick I/O files

■ Displaying Quick I/O status and file attributes

■ Extending a Quick I/O file in a Sybase environment

■ Recreating Quick I/O files after restoring a database

■ Disabling Quick I/O

How to set up Quick I/O

Quick I/O is included in Veritas Storage Foundation Standard and Enterprise

products. By default, Quick I/O is enabled when you mount a VxFS file system.

If Quick I/O is not available in the kernel, or a Veritas Storage Foundation Standard

or Enterprise product license is not installed, a file system mounts without Quick

I/O by default, the Quick I/O file name is treated as a regular file, and no error

Chapter