VERITAS File SystemÖ 3.5 (HP OnlineJFS/JFS3.5) AdministratorÆs Guide (December 2002)

Chapter 8

8 Quick I/O for Databases

Introduction

VERITAS Quick I/O for Databases (referred to as Quick I/O) lets applications access preallocated VxFS files

as raw character devices. This provides the administrative benefits of running databases on file systems

without the performance degradation usually associated with databases created on file systems.

Quick I/O is

available for an additional fee.

See the VERITAS File System 3.5 (OnlineJFS/JFS 3.5) Release Notes for current product information.

Topics covered in this chapter:

• Quick I/O Functionality and Performance

• Using VxFS Files as Raw Character Devices

• Creating a Quick I/O File Using qiomkfile

• Accessing Regular VxFS Files Through Symbolic Links

• Using Quick I/O with Oracle Databases

• Using Quick I/O with Sybase Databases

• Enabling and Disabling Quick I/O

• Cached Quick I/O For Databases

• Quick I/O Statistics

• Quick I/O Summary