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"Life
is what we make it, always has been, always will be."
-Grandma
Moses (1860-1961)
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Oracle
Internet Directory Replication (OID Replication)
(LESSON
26)
Note
on the following important terms from Oracle:
-
Replica: The copy of a naming context contained within a server is
called a replica.
-
Suppliers:
The OID servers in the DRG (Directory Replication Group) that hold
updatable replicas or naming contexts are called suppliers.
-
Consumers:
The OID servers in the DRG to which the updates made on suppliers are
propagated are called consumers.
-
Directory
Replication Group:
A set of OID servers that participate in the replication of a given
naming context is called a Directory Replication Group (DRG).
-
Replication
agreement: A
special directory entry that represents the replication relationship
among the OID servers in a DRG.
-
Change
log purging:
After the OID Replication server applies the changes to the consumer,
the change entries are purged. Purging of the change log entries can
be done by two different methods such as Change
number based or Time based.
Setting
Oracle Internet Directory Replication
To
perform this configuration, you should have two different machines.
Let us named them: The MASTER
and REMOTE machines
Install
complete OracleAS Infrastructure on the MASTER server with the
following setting:
(For
example)
ORACLE_HOME=/u01/oracle/inframaster
ORACLE_SID=inframaster
Oracle
Database Global Name=inframaster.iselfschooling.com
Install
OracleAS Infrastructure without any of the default component option on
the REMOTE server with the following setting:
Notice
that since you have not selected any component to install, the
installer will prompt you to register this installation against an OID
server. Enter the OID server host name and port number of the MASTER
server.
(For
example)
ORACLE_HOME=/u01/oracle/infraremote
ORACLE_SID=infraremote
Oracle
Database Global Name=infraremote.iselfschooling.com
Stop
the OID server LDAP instance on the MASTER server:
#
$ORACLE_HOME/bin/oidctl connect=inframaster.iselfschooling.com
Instance=1
server=oidldapd flags=’-p 3060’ stop
On
the REMOTE server, create a wallet
#
$ORACLE_HOME/bin/oidpasswd connect=infraremote.iselfschooling.com
create_wallet=true
Notice
that you should use the password of ODS schema in the metadata
repository. The default password of the ODS schema is ods. You can
also use the orcladmin’s password.
On
the MASTER server, start the OIDMON and OIDLDAP processes
#
$ORACLE_HOME/bin/oidmon connect=infraremote.iselfschooling.com start
#
$ORACLE_HOME/bin/oidctl connect=inframaster.iselfschooling.com
instance=1
server=oidldapd flags=’-p 3060’ start
Stop
the OIDMON process on the REMOTE server
#
$ORACLE_HOME/bin/oidmon connect=infraremote.iselfschooling.com stop
Modify
the tnsnames.ora file and include a net service name entry for the
REMOTE repository database in the MASTER server and the MASTER
repository database in the REMOTE server.
Assuming
the service names are master and remote, try to tnsping them.
For
example:
Go
to the REMOTE server and execute the following command: # tnsping
master
Go
to the MASTER server and execute the following command: # tnsping
remote
Set
up the ASR-based replication.
Go
to the MASTER server, execute the following command:
#
$ORACLE_HOME/bin/remtool –asrsetup –v
Answer
to all questions. After the setup is completed, remtool will display
you the confirmation and the status of the replication setup.
Start
the OID LDAP server instances on the MASTER and REMOTE servers.
On
MASTER:
#
$ORACLE_HOME/bin/oidctl connect=inframaster.iselfschooling.com
instance=1 server=oidldapd flags=’-p 3060’ start
On
REMOTE
#
$ORACLE_HOME/bin/oidmon connect=infraremote.iselfschooling.com start
Start
the OID Replication server instance on the MASTER and REMOTE servers.
On
MASTER:
#
$ORACLE_HOME/bin/oidctl connect=inframaster.iselfschooling.com
instance=1 server=oidrepld flags=’-p 3060’ start
On
REMOTE:
#
$ORACLE_HOME/bin/oidctl connect=infraremote.iselfschooling.com
instance=1 server=oidldapd flags=’-p 3060’ start
To
verify whether the replication is working, start ODM form both the
MASTER and REMOTE servers and wait for the entries to be replicated
from them.
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