![](https://csdnimg.cn/release/download_crawler_static/9957467/bg12.jpg)
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.
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