Oracle 12c Release 2 Linux 安装指南（E49784-20）详解

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Starting with Oracle Database 12c Release 2 (12.2), Oracle Direct NFS Client

supports parallel NFS. Parallel NFS is an NFSv4.1 option that allows direct client

access to file servers, enabling scalable distributed storage.

For more information, see About Direct NFS Client Mounts to NFS Storage

Devices (page 7-9)

• Direct NFS Dispatcher Support

Starting with Oracle Database 12c Release 2 (12.2), Oracle Direct NFS Client

supports adding a dispatcher or I/O slave infrastructure. For very large database

deployments running Direct NFS client, this feature facilitates scaling of sockets

and TCP connections to multi-path and clustered NFS storage.

For more information, see About Direct NFS Client Mounts to NFS Storage

Devices (page 7-9)

• Kerberos Authentication for Direct NFS

Starting with Oracle Database 12c Release 2 (12.2), Oracle Database supports

Kerberos implementation with Direct NFS communication. This feature solves the

problem of authentication, message integrity, and optional encryption over

unsecured networks for data exchanged between Oracle Database and NFS

servers using Direct NFS protocols.

For more information, see Creating an oranfstab File for Direct NFS Client

(page 8-2)

• Separation of Duty for Administering Oracle Real Application Clusters

Starting with Oracle Database 12c Release 2 (12.2), Oracle Database provides

support for separation of duty best practices when administering Oracle Real

Application Clusters (Oracle RAC) by introducing the SYSRAC administrative

privilege for the clusterware agent. This feature removes the need to use the

powerful SYSDBA administrative privilege for Oracle RAC.

SYSRAC, like SYSDG, SYSBACKUP, and SYSKM, helps enforce separation of

duties and reduce reliance on the use of SYSDBA on production systems. This

administrative privilege is the default mode for connecting to the database by the

clusterware agent on behalf of the Oracle RAC utilities such as srvctl.

For more information, see Extended Oracle Database Groups for Job Role

Separation (page 5-6)

• AL32UTF8 As the Default Database Character Set

Starting with Oracle Database 12c Release 2 (12.2), the default database character

set of a database created from the General Purpose/Transaction Processing or the

Data Warehousing template is Unicode AL32UTF8. Oracle recommends that you

use Unicode AL32UTF8 as the database character set.

For more information, see About Character Set Selection During Installation

(page 11-4)

• Single-instance Configurations and Operations supported by Rapid Home

Provisioning

Starting with Oracle Grid Infrastructure 12c Release 2 (12.2), Rapid Home

Provisioning adds support for installing and configuring single-instance Oracle

Databases. These may be on nodes with or without Oracle Grid Infrastructure

installed. Rapid Home Provisioning does not support single-instance databases

for Oracle Restart configurations.

xviii

Starting with Oracle Grid Infrastructure 12c Release 2 (12.2), Rapid Home

Provisioning also supports Oracle Database upgrades.

For more information, see About Deploying Oracle Database Using Rapid Home

Provisioning (page 12-13)

• Preserve Home Path during Updates with Rapid Home Provisioning

Rapid Home Provisioning leverages a new filesystem capability which allows for

separation of gold image software from the site-specific configuration changes, so

the home path remains unchanged throughout updates. This capability is

available starting with Oracle Database 12c Release 2 (12.2) and Oracle Grid

Infrastructure 12c Release 2 (12.2), and combines the benefits of in-place and out-

of-place patching.

This feature does not apply to Oracle Grid Infrastructure for a standalone server

or Oracle Restart configurations.

• Postinstallation Configuration of Oracle Software using the -executeConfigTools

option

Starting with Oracle Database 12c Release 2 (12.2), you can perform

postinstallation configuration of Oracle products by running the Oracle Database

or Oracle Grid Infrastructure installer with the -executeConfigTools option.

You can use the same response file created during installation to complete

postinstallation configuration.

For more information, see Installing and Configuring Oracle Database Using

Response Files (page B-1)

New Features for Oracle Automatic Storage Management 12c Release 2 (12.2)

• Automatic Configuration of Oracle ASM Filter Driver

Starting with Oracle Database 12c Release 2 (12.2), you can enable and automate

the configuration of Oracle ASM Filter Driver (Oracle ASMFD) with a check box

during the Oracle Grid Infrastructure installation.

For more information, see About Oracle ASM with Oracle ASM Filter Driver

(page 9-7)

• Oracle ACFS Snapshot-Based Replication

The Oracle Automatic Storage Management Cluster File System (Oracle ACFS)

snapshot-based replication feature uses Oracle ACFS snapshot technology to

transfer the differences between successive snapshots to the standby file system

using standard ssh transport protocol. Oracle ACFS Snapshot-based replication is

more efficient with higher performance, lower overhead, and ease of

management.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Compression

Oracle ACFS provides file system compression functionality, reducing storage

requirement, and resulting in lower costs. Oracle ACFS compression is managed

using the new acfsutil compress commands and updates to the acfsutil

info command.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

xix

• Oracle ACFS Defragger

Databases that share storage with snapshots or with the base of the file system can

become fragmented under active online transaction processing (OLTP) workloads.

This fragmentation can cause the location of the data in the volume to be

discontiguous for sequential scans. Oracle ACFS automatically defragments these

files in the background.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Support for 4K Sectors

Oracle ACFS supports I/O requests in multiples of 4K logical sector sizes as well

as continued support for 512-byte logical sector size I/O requests. The i4096

option is provided with the acfsformat command on Microsoft Windows and

the mkfs command in Linux and Oracle Solaris environments.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Automatic Resize

Oracle ACFS provides an automatic resize option with the acfsutil size

command. This command enables you to specify an increment by which an Oracle

ACFS file system grows automatically if the amount of available free space in the

file system falls below a specified amount. There is also an option to specify the

maxiOracle ACFS plugins support file content data collection. Both polling and

interval based capture are supported with the file content collection.mum size

allowed when using the automatic resize option. The output of the acfsutil

info fs command displays the automatic resize increment and maximum

amounts.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Metadata Acceleration

Oracle ACFS supports accelerator metadata storage. This support enables many

critical Oracle ACFS metadata structures, including extent metadata, storage

bitmaps, volume logs, and some snapshot metadata to be placed on accelerator

storage.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Plugins for File Content Data Collection

Oracle ACFS plugins support file content data collection. Both, polling and

interval based capture are supported with the file content collection.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

• Oracle ACFS Sparse Files

Oracle ACFS provides support for sparse files. Oracle ACFS sparse files greatly

benefit NFS client write operations, which are commonly received out of order by

the NFS server and the associated Oracle ACFS file system.

For more information, see Oracle Automatic Storage Management Administrator's

Guide

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