Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

Using Storage Mapping

This chapter includes the following topics:

■ About Storage Mapping

■ Verifying Veritas Storage Mapping setup

■ Using vxstorage_stats

■ Using dbed_analyzer

■ Oracle file mapping (ORAMAP)

About Storage Mapping

Storage mapping is included with Veritas Storage Foundation for Oracle Enterprise

Edition.

Storage mapping enables you to map datafiles, tablespaces, and tables to physical

devices. You may obtain and view detailed storage topology information using

the vxstorage_stats and dbed_analyzer commands or the Veritas Storage

Foundation for Oracle GUI. You may also use the Oracle Enterprise Manager for

Oracle 9i to access storage mapping information.

Access to mapping information is important since it allows for a detailed

understanding of the storage hierarchy in which files reside, information that is

critical for effectively evaluating I/O performance.

Mapping files to their underlying device is straightforward when datafiles are

created directly on a raw device. With the introduction of host-based volume

managers and sophisticated storage subsystems that provide RAID features,

however, mapping files to physical devices has become more difficult.

With the Veritas Storage Foundation for Oracle Storage Mapping option, you can

map datafiles to physical devices. Veritas Storage Mapping relies on Veritas

Chapter