Configuring the Oracle Network Environment
配置oracle網絡環境
you should be able to:
Use Enterprise Manager to:
1、Create additional listeners
2、Create Oracle Net Service aliases
3、Configure connect-time failover
4、Control the Oracle Net Listener
5、Use tnsping to test Oracle Net connectivity
6、Identify when to use shared servers and when to use dedicated servers
Oracle Net configuration files ：
<Grid_home>/network/admin/listener.ora
./sqlnet.ora
grid用戶下：
more listener.ora
more sqlnet.ora
ss -ln
windows cmd> tnsping 192.168.133.120:1521/tech1
Tools for Configuring and Managing the Oracle Network：
1、Enterprise Manager Net Services Administration page
2、Oracle Net Manager
3、Oracle Net Configuration Assistant
4、Command line
例：
$ . oraenv
ORACLE_SID = [orcl] ? +ASM
$ lsnrctl
LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 30-JUN-2009 00:47:01
Copyright (c) 1991, 2009, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> help
The following operations are available
An asterisk () denotes a modifier or extended command:
start stop status
services version reload
save_config trace spawn
change_password quit exit
set show*
$ lsnrctl <command name>
$ lsnrctl start
$ lsnrctl status
LSNRCTL> <command name>
LSNRCTL> start
LSNRCTL> status
LSNRCTL> show parameter service
LSNRCTL> change_password 設置監聽密碼
vim listener.ora
LSNRCTL>reload 重啓才生效
Using SRVCTL to Start and Stop the Listener 使用 srvctl 起停監聽
$ srvctl -h
$ srvctl start listener
$ srvctl stop listener
$ srvctl start listener –l mylistener
$ srvctl status listener
$srvctl status listener
$crs_stat -t
Naming Methods 服務命名方式
Oracle Net supports several methods of resolving connection information:
1、Easy connect naming: Uses a TCP/IP connect string
2、Local naming: Uses a local configuration file
3、Directory naming: Uses a centralized LDAP-compliant directory server
4、External naming: Uses a supported non-Oracle naming service
1、 easy connect 簡易連接
SQL> CONNECT hr/[email protected]:1521/dba11g
2、Local naming
Requires a client-side Names Resolution file
Supports all Oracle Net protocols
Supports advanced connection options such as:
a. Connect-time failover
b. Source routing
c. Load balancing
SQL> CONNECT hr/hr@orcl
僅限共享模式：SGA->UGA
When Not to Use a Shared Server
Certain types of database work must not be performed using shared servers:
a. Database administration
b. Backup and recovery operations
c. Batch processing and bulk load operations
d. Data warehouse operations
Configuring CommunicationBetween Databases 配置交互在DB之間
Sending data or messages between sites requires network configuration on both sites.
You must configure the following:
Network connectivity (for example, TNSNAMES.ora)
Database links
CREATE DATABASE LINK <remote_global_name>
CONNECT TO <user> IDENTIFIED BY <pwd>
USING '<connect_string_for_remote_db>';
例：
show con_name;
alter session set contaioner=pdb;
create database link ......
connect to .....
using .......;
alter pluggable database pdb open;