VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

Prerelease 8 September 2005, 8:54am 83

Using VERITAS Quick I/O

VERITAS Quick I/O is a VxFS feature included in VERITAS Storage Foundation for Oracle that

lets applications access preallocated VxFS files as raw character devices. Quick I/O provides the

administrative benefits of running databases on file systems without the performance degradation

typically associated with running databases on file systems or raw devices. This chapter describes

how to set up and use Quick I/O.

Note VERITAS recommends that you use VERITAS Extension for Oracle Disk Manager. For

more information, see “Using VERITAS Extension for Oracle Disk Manager” on page 123.

Topics covered in this chapter include:

◆ “Understanding Quick I/O” on page 84

◆ “Creating Database Files as Quick I/O Files Using qiomkfile” on page 88

◆ “Preallocating Space for Quick I/O Files Using the setext Command” on page 90

◆ “Accessing Regular VxFS Files as Quick I/O Files” on page 92

◆ “Converting Oracle Files to Quick I/O Files” on page 94

◆ “Understanding Sparse Files” on page 98

◆ “Handling Oracle Temporary Tablespaces and Quick I/O” on page 99

◆ “Displaying Quick I/O Status and File Attributes” on page 102

◆ “Extending a Quick I/O File” on page 104

◆ “Using Oracle’s AUTOEXTEND With Quick I/O Files” on page 106

◆ “Disabling Quick I/O” on page 108