Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

Mapping Service (VxMS), a library that assists in the development of distributed
SAN applications that must share information about the physical location of files
and volumes on a disk.
The Veritas Storage Mapping option supports Oracle's set of storage APIs called
Oracle Mapping (“ORAMAP” for short) that lets Oracle determine the mapping
information for files and devices.
Oracle provides a set of dynamic performance views (V$ views) that shows the
complete mapping of a file to intermediate layers of logical volumes and physical
devices. These views enable you to locate the exact disk on which any specific
block of a file resides. You can use these mappings, along with device statistics,
to evaluate I/O performance.
You can view storage mapping topology information and I/O statistics using:
■ The vxstorage_stats command. This command displays the complete I/O
topology mapping of specific datafiles through intermediate layers like logical
volumes down to actual physical devices.
■ The dbed_analyzer command. This command retrieves tablespace-to-physical
and table-to-physical disk mapping information for all the datafiles in a
specified database. It also provides information about the amount of disk space
being used by a tablespace.
■ The Veritas Storage Foundation for Oracle GUI. The GUI performs file mapping
and displays both storage mapping topology information and I/O statistics.
In addition, you can also use the Oracle Enterprise Manager GUI to display storage
mapping information after file mapping has occurred. Oracle Enterprise Manager
does not display I/O statistics information. Unlike the information displayed in
the Veritas Storage Foundation for Oracle GUI, the information displayed in Oracle
Enterprise Manager may be “stale,” that is, it may not be the latest information.
Verifying Veritas Storage Mapping setup
Before using the Veritas Storage Mapping option, verify that the features are set
up correctly.
Using Storage Mapping
Verifying Veritas Storage Mapping setup
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