Veritas Storage Foundation 5.1 SP1: Storage and Availability Management for Oracle (5900-1504, April 2011)

is no need for third-party multi-pathing software, reducing the total cost of

ownership.

Storage Foundation database accelerators enable you to manage performance for

your database with more precision.

■ To improve Oracle performance and manage system bandwidth through an

improved Application Programming Interface (API) that contains advanced

kernel support for file I/O, use Veritas Oracle Disk Manager (ODM).

Veritas Extension for Oracle Disk Manager supports Oracle Resilvering. With

Oracle Resilvering, the storage layer receives information from the Oracle

database as to which regions or blocks of a mirrored datafile to resync after a

system crash. When using Oracle Resilvering, you can turn off Veritas Volume

Manager Dirty Region Logging (DRL), which increases performance.

■ To reduce the time required to restore consistency, freeing more I/O bandwidth

for business-critical applications, use SmartSync recovery accelerator.

■ To use Oracle Resilvering and turn off Veritas Volume Manager Dirty Region

Logging (DRL) to increase performance, use ODM.

■ To enable selected I/O to use caching to improve ODM I/O performance, use

Veritas Extension for Cached Oracle Disk Manager (Cached ODM).

■ To achieve raw device performance for databases run on Veritas File System

file systems, use Veritas Quick I/O.

■ To further enhance Oracle database performance by leveraging large system

memory to selectively buffer the frequently accessed data, use Veritas Cached

Quick I/O.

About Quick I/O

Veritas Quick I/O is a VxFS feature included in Veritas Storage Foundation

Standard and Enterprise products 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 typically associated degradation

in performance.

Note: Symantec recommends that you use Veritas Extension for Oracle Disk

Manager for Oracle.

See “About Oracle Disk Manager” on page 57.

Overview of database accelerators

About Quick I/O