OCM_Session1_4_Client-side Network configuration


4. Client-side Network configuration
 4.1 Create the client-side network configuration files providing connect descriptors to your databases using local naming and easy connect methods.
  4.1.1 The prod alias should connect to the PROD instance using the default listener and always use a dedicated server connection.
  4.1.2 The prod_s alias should connect to the PROD instance using LSNR2 and use a shared server connection.
 4.2 The racdb alias should connect to the RACDB service (created later) with a dedicated server connection.
  4.2.1 The RACDB service will be running on your RAC Cluster
 4.3 The emrep alias should connect to the EMREP instance (created later) wiht a dedicated server connection. 

  •  4.1 Create the client-side network configuration files providing connect descriptors to your databases using local naming and easy connect methods.
参考联机文档：
Net Services Reference ==>5 Profile Parameters (sqlnet.ora)

NAMES.DIRECTORY_PATH

Purpose

Use the parameter NAMES.DIRECTORY_PATH to specify the order of the naming methods used for client name resolution lookups.

Default

NAMES.DIRECTORY_PATH=(tnsnames, onames, hostname)

Values

Table 5-1 NAMES.DIRECTORY_PATH Values

Naming Method Value Description
tnsnames (local naming naming method) Set to resolve a net service name through the tnsnames.ora file on the client.

See Also: Oracle Database Net Services Administrator's Guide
ldap (directory naming naming method) Set to resolve a database service name, net service name, or net service alias through a directory server.

See Also: Oracle Database Net Services Administrator's Guide
ezconnect or hostname (easy connect naming or host naming method) Select to enable clients to use a TCP/IP connect identifier, consisting of a host name and optional port and service name.

See Also: Oracle Database Net Services Administrator's Guide
cds (CDS external naming method) Set to resolve an Oracle database name in a Distributed Computing Environment (DCE) environment.

See Also: Oracle Database Advanced Security Administrator's Guide
nis (Network Information Service (NIS) external naming method) Set to resolve service information through an existing NIS.

See Also: Oracle Database Net Services Administrator's Guide

NAMES.DIRECTORY_PATH=(tnsnames, ezconnect)


创建 sqlnet.ora，内容如下：
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

[oracle@ocm1 admin]$ vi sqlnet.ora
MES.DIRECTORY_PATH=(tnsnames, ezconnect)

~
"sqlnet.ora" [New] 1L, 41C written                                                                                              
[oracle@ocm1 admin]$ 



监听重启，验证：
                                                                                            
[oracle@ocm1 admin]$ lsnrctl stop 

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 18-MAR-2014 13:40:48

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521)))
The command completed successfully
[oracle@ocm1 admin]$ lsnrctl start

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 18-MAR-2014 13:40:58

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                18-MAR-2014 13:40:59
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/listener.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))
Services Summary...
Service "EMREP" has 1 instance(s).
  Instance "EMREP", status UNKNOWN, has 1 handler(s) for this service...
Service "PROD" has 1 instance(s).
  Instance "PROD", status UNKNOWN, has 1 handler(s) for this service...
Service "plsextproc" has 1 instance(s).
  Instance "plsextproc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
[oracle@ocm1 admin]$ lsnrctl stop lsnr2

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 18-MAR-2014 13:41:07

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526)))
The command completed successfully
[oracle@ocm1 admin]$ lsnrctl start lsnr2

LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 18-MAR-2014 13:41:21

Copyright (c) 1991, 2005, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr2.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc1)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526)))
STATUS of the LISTENER
------------------------
Alias                     lsnr2
Version                   TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date                18-MAR-2014 13:41:21
Uptime                    0 days 0 hr. 0 min. 0 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/10.2.0/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/product/10.2.0/db_1/network/log/lsnr2.log
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc1)))
The listener supports no services
The command completed successfully
[oracle@ocm1 admin]$ 

重新注册一下
SQL> alter system register
  2  ;

System altered.

[oracle@ocm1 admin]$ cat sqlnet.ora 
MES.DIRECTORY_PATH=(tnsnames, ezconnect)


验证easy 连接
CONNECT username/password@[//]host[:port][/service_name]

验证，可以连接
SQL> connect system/oracle@//ocm1.localdomain:1521/PROD
Connected.

  •   4.1.1 The prod alias should connect to the PROD instance using the default listener and always use a dedicated server connection.
参考联机文档：
Net Services Reference ==> 6 Local Naming Parameters (tnsnames.ora)

Example 6-1 Basic Format of tnsnames.ora File

Example

net_service_name=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=sales1-svr)(PORT=1521))
  (ADDRESS=(PROTOCOL=tcp)(HOST=sales2-svr)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=sales.us.acme.com)))

修改后：

[oracle@ocm1 admin]$ vi tnsnames.ora
prod=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=dedicated)))
~
验证连接：
SQL> conn system/oracle@prod
Connected.
可以连接


  • 4.1.2 The prod_s alias should connect to the PROD instance using LSNR2 and use a shared server connection.
向刚创建的 tnsnames.ora添加prod_s,端口1526，PROD,shared
[oracle@ocm1 admin]$ vi tnsnames.ora 
prod=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=dedicated)))


prod_s=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=shared)))
~
~
"tnsnames.ora" 14L, 291C written                                                                                                
[oracle@ocm1 admin]$ 

验证连接，可以连接
SQL> conn system/oracle@prod_s
Connected.

可查看是否使用shared服务连接：
Reference--》V$SESSION

SERVER VARCHAR2(9) Server type (DEDICATED| SHARED| PSEUDO| NONE)

SQL> conn system/oracle@prod_s
Connected.
SQL> select sid,server from v$session;

       SID SERVER
---------- ---------
       280 DEDICATED
       282 DEDICATED
       285 DEDICATED
       288 SHARED
       290 DEDICATED
       291 DEDICATED
       292 DEDICATED
       293 DEDICATED
       294 DEDICATED
       295 DEDICATED
       296 DEDICATED

       SID SERVER
---------- ---------
       297 DEDICATED
       298 DEDICATED
       299 DEDICATED
       300 DEDICATED

15 rows selected.

SQL> conn system/oracle@prod
Connected.
SQL> select sid,server from v$session;

       SID SERVER
---------- ---------
       280 DEDICATED
       282 DEDICATED
       285 DEDICATED
       288 DEDICATED
       290 DEDICATED
       291 DEDICATED
       292 DEDICATED
       293 DEDICATED
       294 DEDICATED
       295 DEDICATED
       296 DEDICATED

       SID SERVER
---------- ---------
       297 DEDICATED
       298 DEDICATED
       299 DEDICATED
       300 DEDICATED

15 rows selected.

SQL> 


  •  4.2 The racdb alias should connect to the RACDB service (created later) with a dedicated server connection.
  •   4.2.1 The RACDB service will be running on your RAC Cluster

向刚创建的tnsnames.ora添加内容racdb，端口1521
[oracle@ocm1 admin]$ vi tnsnames.ora 
prod=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=dedicated)))


prod_s=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=shared)))


racdb=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=RACDB)
   (SERVER=dedicated)))
~
~
~
~
"tnsnames.ora" 22L, 440C written                                                                                                
[oracle@ocm1 admin]$ 


  •  4.3 The emrep alias should connect to the EMREP instance (created later) wiht a dedicated server connection. 

[oracle@ocm1 admin]$ vi tnsnames.ora 
prod=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=dedicated)))


prod_s=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1526))
  (CONNECT_DATA=
   (SERVICE_NAME=PROD)
   (SERVER=shared)))


racdb=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=RACDB)
   (SERVER=dedicated)))


emrep=
(DESCRIPTION=
  (ADDRESS=(PROTOCOL=tcp)(HOST=ocm1.localdomain)(PORT=1521))
  (CONNECT_DATA=
   (SERVICE_NAME=EMREP)
   (SERVER=dedicated)))
"tnsnames.ora" 30L, 589C written                                                                                                
[oracle@ocm1 admin]$ 

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原文地址：https://www.cnblogs.com/hzcya1995/p/13315898.html