Tag Archives: configuration

11g, hp-ux, network, Oracle, Oracle 10g, oracle 9i, RAC, unix

Configuration of OCFS2 in LINUX

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OCFS2 Oracle Cluster File System version 2 is a file system which allows for multiple machines to open the same files at the same time without corruption. This file system can be used for multiple reasons but is mostly seen in Oracle RAC systems. This article details the configuration of OCFS2 after the RPMs have been installed on your OS.

1. Logon to your Linux server as root.

2. Create the directory /etc/ocfs2 to house your oracle cluster.conf file. This file will contain the name of your cluster and all nodes with in that cluster.

[root@mylinux1 etc]# mkdir /etc/ocfs2
[root@mylinux1 etc]# chmod 775 /etc/ocfs2

3. Edit the file cluster.conf and enter the strings similar to below; changing the value of ip_address, name and cluster to values which are correct for your installation..

[root@mylinux1 etc]# vi /etc/ocfs2/cluster.conf

node:
ip_port = 7777
ip_address = 204.34.132.38
number = 0
name = mylinux1.mydomain.com
cluster = myrac

node:
ip_port = 7777
ip_address = 204.34.132.39
number = 1
name = mylinux2.mydomain.com
cluster = myrac

cluster:
node_count = 2
name = myrac

4. Configure the ocfs2 installed on each node of the RAC with the o2cb configure command. NOTE: Enter the following:


Load O2CB driver on boot (y/n) [y] = y
Cluster stack backing O2CB [o2cb] = o2cb
Cluster to start on boot (Enter “none” to clear) [ocfs2]: = name of the cluster in cluster.conf file for this example it is myrac
Specify heartbeat dead threshold (>=7) [31] = 31
Specify network idle timeout in ms (>=5000) [30000] = 30000
Specify network keepalive delay in ms (>=1000) [2000] = 2000
Specify network reconnect delay in ms (>=2000) [2000] = 2000

Example:
[root@mylinux1 etc]# /etc/init.d/o2cb configure
Configuring the O2CB driver.

This will configure the on-boot properties of the O2CB driver.
The following questions will determine whether the driver is loaded on
boot. The current values will be shown in brackets (‘[]’). Hitting
without typing an answer will keep that current value. Ctrl-C
will abort.

Load O2CB driver on boot (y/n) [y]:
Cluster stack backing O2CB [o2cb]:
Cluster to start on boot (Enter “none” to clear) [ocfs2]: myrac
Specify heartbeat dead threshold (>=7) [31]:
Specify network idle timeout in ms (>=5000) [30000]:
Specify network keepalive delay in ms (>=1000) [2000]:
Specify network reconnect delay in ms (>=2000) [2000]:
Writing O2CB configuration: OK
Starting O2CB cluster myrac: OK
[root@mylinux1 etc]#

[root@mylinux2 etc]# /etc/init.d/o2cb configure
Configuring the O2CB driver.

This will configure the on-boot properties of the O2CB driver.
The following questions will determine whether the driver is loaded on
boot. The current values will be shown in brackets (‘[]’). Hitting
without typing an answer will keep that current value. Ctrl-C
will abort.

Load O2CB driver on boot (y/n) [n]: y
Cluster stack backing O2CB [o2cb]:
Cluster to start on boot (Enter “none” to clear) [ocfs2]: myrac
Specify heartbeat dead threshold (>=7) [31]:
Specify network idle timeout in ms (>=5000) [30000]:
Specify network keepalive delay in ms (>=1000) [2000]:
Specify network reconnect delay in ms (>=2000) [2000]:
Writing O2CB configuration: OK
Loading filesystem “configfs”: OK
Mounting configfs filesystem at /sys/kernel/config: OK
Loading filesystem “ocfs2_dlmfs”: OK
Creating directory ‘/dlm’: OK
Mounting ocfs2_dlmfs filesystem at /dlm: OK
Starting O2CB cluster myrac: OK
[root@mylinux2 etc]#


This completes configuration of OCFS2 for Oracle RAC.

Larry J. Catt, OCP 9i, 10g
oracle@allcompute.com
www.allcompute.com

11g, hp-ux, itanium, linux, network, Oracle, Oracle 10g, oracle 9i

Oracle NETCA – Network Configuration assistant.

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Oracle provides several Configuration Assistant tools to facility administrative duties required by an Oracle DBA or Developer. The Oracle’s NETCA (Network Configuration Assistant) is the GUI tool used to configure the network components of your Oracle RDBMS. In this article we will review the startup of the Network Configuration Assistant within a RHEL environment.

1. Logon to your Oracle Database server as the Oracle software owner.
2. Change directories to your $ORACLE_HOME/bin.

mylinux:> cd $ORACLE_HOME/bin
mylinux:>

3. Export your display to your local machine if you are not logon to the server itself.

mylinux:> export DISPLAY=192.168.0.110:0.0
mylinux:>

4. You will require a terminal emulation program executing on your local machine to produce the display from your database server. Any terminal display software will do, however I would suggest VNC which can be downloaded for free at the URL: www.realvnc.com

5. Execute the dbca shell script to startup the database configuration assistant.


mylinux:> ./netca

6. The Network Configuration Assistant is self explanatory from here on. It allows the ability to configure, add, delete and modify you various Oracle networking components.

Larry J. Catt, OCP 9i, 10g
oracle@allcompute.com
www.allcompute.com

11g, linux, network, Oracle, Oracle 10g, oracle 9i

Defining ORACLE network configuration home directory:

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Oracle provides the environmental variable TNS_ADMIN to direct the oracle binaries to the location of your network configuration files (TNSNAMES.ORA, SQLNET.ORA, and LISTENER.ORA). In a UNIX or LINUX environment this is normally placed in the Oracle software owner’s
.profile or .bash_profile file under the home directory. Windows definitions are covered in a separate article. This environmental variable is very helpful in redirecting multiple oracle installations to a single listener.ora; configuring multiple databases using the same home directory to separate network configuration files or for changing the network configuration location from the default of $ORACLE_HOME/network/admin to another location. In this article we will define the TNS_ADMIN.

1. Logon to your Oracle database server as the Oracle software owner.

2. Open your .profile or .bash_profile file in you home directory and place the following line at the end.

export TNS_ADMIN={directory_structure_for_network_files} v

3. Save your .profile or .bash_profile and exit.

4. Re-initialize the .profile or .bash_profile with the following command: . ./.bash

/home/oracle@orcl $ . ./.profile

5. Echo the parameter TNS_ADMIN to make sure that the variable was read.

/home/oracle@orcl $ echo $TNS_ADMIN
/opt/oralce/db_1/network/admin/orcl
/home/oracle@orcl $

6. Startup the listener and see that the lsnrctl utility picks up the configuration files in the new location referenced by TNS_ADMIN variable and not the default $ORACLE_HOME/network/admin

/home/oracle@orcl $ lsnrctl

LSNRCTL for LINUX: Version 9.2.0.8.0 – Production on 09-DEC-2009 17:26:23

Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved.

Welcome to LSNRCTL, type “help” for information.

LSNRCTL> start
Starting /opt/oralce/db_1/bin/tnslsnr: please wait…

TNSLSNR for LINUX: Version 9.2.0.8.0 – Production
System parameter file is
/opt/oralce/db_1/network/admin/orcl/listener.ora
Log messages written to /opt/oralce/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=chase)(PORT=1526)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LUFS)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=ORCL)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=orclm)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=chase)(PORT=1526)))
STATUS of the LISTENER
————————
Alias LISTENER
Version TNSLSNR for LINUX: Version 9.2.0.8.0 – Production
Start Date 09-DEC-2009 17:26:27
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security OFF
SNMP OFF
Listener Parameter File
/opt/oralce/db_1/network/admin/orcl/listener.ora
Listener Log File /opt/oralce/db_1/network/log/listener.log
Listening Endpoints Summary…
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=chase)(PORT=1526)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LUFS)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=ORCL)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=orclm)))
Services Summary…
Service “orcl” has 1 instance(s).
Instance “orcl”, status UNKNOWN, has 1 handler(s) for this service…
The command completed successfully
LSNRCTL>

7. That completes redirect to new network configuration file location in Oracle for UNIX and LINUX servers.

Larry J. Catt, OCP 9i, 10g
oracle@allcompute.com
www.allcompute.com