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EMCLI setup

Pankaj Chandiramani - Mon, 2014-04-28 02:15

A quick note on how to install EMCLI which is used for various CLI operations from EM . I was looking to test some Database provisioning automation via EMCLI and thus was looking to setup the same . 


EMCLI Setup
To set up EMCLI on the host, follow these steps:
1.    Download the emcliadvancedkit.jar from the OMS using URL https://<omshost>:<omsport>/em/public_lib_download/emcli/kit/emcliadvancedkit.jar
2.    Set your JAVA_HOME environment variable and ensure that it is part of your PATH. You must be running Java 1.6.0_43 or greater. For example:
o    setenv JAVA_HOME /usr/local/packages/j2sdk
o    setenv PATH $JAVA_HOME/bin:$PATH
3.    You can install the EMCLI with scripting option in any directory either on the same machine on which the OMS is running or on any machine on your network (download the emcliadvancedkit.jar to that machine)
java -jar emcliadvancedkit.jar client -install_dir=<emcli client dir>
4.    Run emcli help sync from the EMCLI Home (the directory where you have installed emcli) for instructions on how to use the "sync" verb to configure the client for a particular OMS.
5.    Navigate to the Setup menu then the Command Line Interface. See the Enterprise Manager Command Line Tools Download page for details on setting EMCLI.



Categories: DBA Blogs

12c: Connecting to CDB/PDB – Set Container Vs Connect

Oracle in Action - Thu, 2014-04-24 03:29

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In Oracle 12c, you can connect to a PDB using two methods :

- Switch the container using Alter system set container …

- Use connect command to connect to PDB using network alias

Let’s compare the two methods :

The use of SET CONTAINER avoids the need to create a new connection from scratch.

If there is an existing connection to a PDB / CDB$root, the same connection can be used to connect to desired PDB / CDB$root.

– Connect to CDB

[oracle@em12 ~]$ sqlplus system/oracle@cdb1

CDB$ROOT@CDB1> sho con_name

CON_NAME
------------------------------
CDB$ROOT

– Check the PID for the process created on the operating system

[oracle@em12 ~]$ ps -ef |grep LOCAL |grep -v grep

oracle 23271 1 0 10:23 ? 00:00:00 oraclecdb1 (LOCAL=NO)

– Change the container to PDB1 using Set container

CDB$ROOT@CDB1> alter session set container=pdb1;

sho con_name

CON_NAME
------------------------------
PDB1

– Check that the operating system PID remains the same as earlier connection is reused and a new connection has not been created

[oracle@em12 ~]$ ps -ef |grep LOCAL |grep -v grep

oracle 23271 1 0 10:23 ? 00:00:00 oraclecdb1 (LOCAL=NO)

– Switch the container back to cdb$root using connect

CDB$ROOT@CDB1> conn system/oracle@cdb1
sho con_name

CON_NAME
------------------------------
CDB$ROOT

– Check that a new operating system PID has been created as a new  connection  has been created

[oracle@em12 ~]$ ps -ef |grep LOCAL |grep -v grep

oracle 23409 1 0 10:29 ? 00:00:00 oraclecdb1 (LOCAL=NO)
glogin.sql is not executed when Alter session set container is used

To demonstrate it, I have added following lines to my glogin.sql to display CDB/PDB name in SQL prompt:

define gname=idle
column global_name new_value gname
set heading off
set termout off
col global_name noprint
select upper(sys_context ('userenv', 'con_name') || '@' || sys_context('userenv', 'db_name')) global_name from dual;
set sqlprompt '&gname> '
set heading on
set termout on

- Let’s connect to PDB1 using “Connect” and verify that glogin.sql is executed and prompt displays CDB/PDB name

 

SQL> conn sys/oracle@pdb1 as sysdba
PDB1@CDB1> 

- Verify that the prompt displays current container (PDB1) and container database (CDB1)

PDB1@CDB1> sho con_name
PDB1

PDB1@CDB1> sho parameter db_name
db_name                              string      cdb1

– Now let’s connect to PDB2 using Alter session set container and verify that glogin.sql is not executed and the same prompt as earlier is displayed

PDB1@CDB1>  alter session set container=pdb2;

 Session altered.
PDB1@CDB1> sho con_name
CON_NAME

 ------------------------------

 PDB2  
-- Let's connect to PDB2 using connect and verify that glogin.sql is executed as the prompt displays the PDB name PDB2

 PDB1@CDB1> connect sys/oracle@pdb2 as sysdba

 PDB2@CDB1> 
Pending transactions are not committed when Alter system set container is used

– Let’s start a transaction in PDB1

PDB1@CDB1> create table pdb1_tab(x number);
Table created.
PDB1@CDB1> insert into pdb1_tab values (1);
1 row created.

– Switch the container to PDB2

PDB1@CDB1> alter session set container=pdb2;

– Try to start another transaction on PDB2 – does not allow as an active transaction exists in the parent container PDB1

PDB1@CDB1> create table pdb2_tab (x number);

 create table pdb2_tab (x number)

 *

 ERROR at line 1:

 ORA-65023: active transaction exists in container PDB1

– In another session check that the transaction was not committed and no rows are visible in table pdb1_tab

CDB$ROOT@CDB1> conn system/oracle@pdb1

 PDB1@CDB1> select * from pdb1_tab;
no rows selected
 Alter session set container cannot be used by local users

 

– Try to give set container privilege to a local user HR in PDB2 – fails as common privilege cannot be granted to a local user and hence a local user cannot user alter session set container to connect to another PDB

PDB2@CDB1> connect system/oracle@pdb2

 PDB2@CDB1> grant set container to hr container=all;

 grant set container to hr container=all

 *

 ERROR at line 1:

 ORA-65030: one may not grant a Common Privilege to a Local User or Role

I hope this post was useful.

Your comments and suggestions are always welcome.

References :

http://docs.oracle.com/cd/E16655_01/server.121/e17636/cdb_admin.htm#ADMIN13970

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Copyright © ORACLE IN ACTION [12c: Connecting to CDB/PDB - Set Container Vs Connect], All Right Reserved. 2014.

The post 12c: Connecting to CDB/PDB – Set Container Vs Connect appeared first on ORACLE IN ACTION.

Categories: DBA Blogs

Webcast: Database Cloning in Minutes using Oracle Enterprise Manager 12c Database as a Service Snap Clone

Pankaj Chandiramani - Thu, 2014-04-17 04:02

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Categories: DBA Blogs

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