VERITAS Storage Foundation 4.1 Oracle Administrator's Guide

VERITAS Storage Foundation for Oracle Prerelease 8 September 2005, 8:54am
22 VERITAS Storage Foundation for Oracle Administrator’s Guide
◆ VERITAS Storage Mapping
Storage Mapping, a feature of the Enterprise Edition, lets you take full advantage of Oracle
storage mapping to map datafiles to physical devices and display storage object I/O statistics.
Oracle’s file mapping (I/O topology) feature was introduced beginning with Oracle9i Release
2.
Both storage object I/O statistics and the storage structure can be displayed for a specific file
using either the vxstorage_stats command or the VERITAS Storage Foundation for
Oracle GUI. In addition, mapping information showing which tablespaces reside on which
physical disks can be obtained for a specified database using the dbed_analyzer
command.
◆ VERITAS Database FlashSnap
Database FlashSnap is a separately-licensed option available for purchase if you have the
Enterprise Edition. Database FlashSnap lets you create and resynchronize volume snapshots
for databases. The snapshots can be used on a second host. Also, database administrators can
perform these tasks without root privileges.
◆ VERITAS Storage Mapping
Storage Mapping is a separately-licensed option available for purchase if you have the
Enterprise Edition. Storage Mapping lets you take full advantage of Oracle storage mapping to
map datafiles to physical devices. Oracle’s mapping feature is only available with Oracle9i
Release 2’s File Mapping (I/O topology) feature.
◆ VERITAS File System (VxFS)
A high-performance, fast-recovery file system that is optimized for business-critical database
applications and data-intensive workloads. VxFS offers online administration, letting you
perform most frequently scheduled maintenance tasks (including online backup, resizing, and
file system changes) without interrupting data or system availability. VxFS also provides
support for large file systems (up to 8 exabytes.)
VERITAS File System offers performance-enhancing features that are of particular interest in
a database environment:
◆ VERITAS Quick I/O is a VxFS feature that improves the throughput for Oracle databases
built on VERITAS File Systems. Quick I/O delivers raw device performance to databases
run on VxFS, providing the administrative advantages of using file systems without the
performance penalties.
◆ VERITAS Cached Quick I/O further enhances database performance by leveraging large
system memory to selectively buffer the frequently accessed data.
◆ A feature of the Enterprise Edition, VxFS Storage Checkpoint technology lets you create a
point-in-time image of a file system. Storage Checkpoints are treated like any other VxFS
file system and can be created, mounted, unmounted, and removed with VxFS and
VERITAS Storage Foundation for Oracle administrative utilities.