1. Net Services Administrator's Guide
  2. Changes in This Release for Oracle Database Net Services Administrator's Guide

Changes in This Release for Oracle Database Net Services Administrator's Guide

These are the changes in Oracle Database Net Services Administrator's Guide for Oracle Database 18c:

New Features

The following are the new features in Oracle Net Services:

  • Read-only Oracle Home Support

    An Oracle home can be configured in a read-only mode, which prevents creation or modification of files inside the Oracle home (ORACLE_HOME) directory. A read-only Oracle home can be used as a software image that can be shared across multiple independent servers. This simplifies patching and mass rollout as only one Oracle home image needs to be updated to distribute a patch to multiple servers. In the read-only Oracle home mode, ORACLE_BASE_HOME is a home-specific directory located at ORACLE_BASE/homes/HOME_NAME.

    See Also:

    Configuring Read-Only Oracle Homes

  • Support for Oracle Connection Manager in Traffic Director Mode

    Starting with Oracle Database release 18c, Oracle Connection Manager in Traffic Director Mode is a proxy that is placed between the database clients and the database instances. This feature provides improved high availability and performance for both planned and unplanned outages with the help of new cman.ora parameters. Some of the existing parameters that support Oracle Connection Manager in Traffic Director Mode are inbound_connect_timeout, min_gateway_processes, max_gateway_processes, and max_connections. Additional parameters must be specified in the cman.ora configuration file to configure Oracle Connection Manager in Traffic Director Mode.

    The client applications must be Database Resident Connection Pool (DRCP) aware. This means enabling DRCP in connect string or in tnsnames.ora alias. These applications can be supported with Oracle Connection Manager in Traffic Director Mode for failover, multiplexing, data dependent routing, and offloading operations that involve routing calls over different sessions.

    See Also:

  • New Initialization Parameter for Service Registration

    Starting with Oracle Database release 18c, a new initialization parameter, FORWARD_LISTENER is introduced for service registration. It specifies the name of a listener to which a connection must be forwarded by an existing set of remote listeners.

    See Also:

    Setting Initialization Parameters for Service Registration

Deprecated Features

The following features are deprecated in this release and may be desupported in a future release:

Deprecation of Sockets Direct Protocol (SDP)

The Oracle Net Services support for Sockets Direct Protocol (SDP) is deprecated. Oracle recommends that you use TCP as an alternative.

Deprecation of Weak Native Network Encryption and Integrity Algorithms

The DES, DES40, 3DES112, 3DES168, RC4_40, RC4_56, RC4_128, RC4_256, and MD5 algorithms are deprecated in this release.

As a result of this deprecation, Oracle recommends that you review your network encryption and integrity configuration to check if you have specified any of the deprecated weak algorithms.

To transition your Oracle Database environment to use stronger algorithms, download and install the patch described in My Oracle Support note 2118136.2.

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