Implementing Parallel Concurrent Processing
Implementing Parallel Concurrent Processing
Parallel Concurrent Processing is the ability to simultaneously run your concurrent managers of various nodes. This results in efficient processing power and also allows the ability of failover. That is in the even of one of your concurrent manager node becomes un available the standard managers will fail over to the other node.
You can implement PCP either in a normal implementation of Oracle Applications or by implementing RAC, however to exploit the feature of PCP completely it is best that you implement RAC to ensure that you have a oncurrent managers available even if your DB node comes down.
In my current post i will write about implementing PCP on a non- RAC environment.
Rapidinstall does not allow you to configure two concurrent processing nodes at the time of install for which I will I have to use rapid clone to create another concurrent processing node for me.
In the current example i have a single node installation of Oracle Applications (11.5.10.2) running on Node A.
The brief overview of steps involved in this implementation of PCP are
- Use Rapidclone to clone and create another node.
- Use adaddnode and register the new node in the database.
- Use Oracle Application Manager to turn PCP on.
- Define and Verfiy the Concurrent Manager seetings and Workshifts.
- Test Failover.
Use Rapidclone to clone and create another node
Running Preclone on current node
#su - applsam
$cd samappl
$. ./APPSORA.env
$cd $COMMON_TOP/admin/scripts/SAM_SAMLXA
$perl adpreclone.pl appsTier
Disable security option
In Oracle Applications 11.5.10 the SQL*NET restricted security option is enabled by default. As a result your new node Node_B will not be able to connect to the database. You must either disable this security option or the better way is to add Node_B is the list of trusted nodes through OAM.
Oracle Applications Manager -> Security ->Disable Restricted Sectrity Option.
After this you must run Autoconfig on the database Tier and restart your listener.
# su - orasam
$ cd $ORACLE_HOME/appsutil/scripts/SAM_NOde_A
$ ./adautocfg.sh
Restart your listener
$ ./addlnctl.sh stop sam
$ ./addlnctl.sh start sam
Preparing the new node (Node B) to copy the application tier file system.
On Node B make the following dir structure
# cd /u02
# mkdir sam
# chmod -R 777 sam
Copy the files across to Node B
Shutdown on Application and Database services on Node A
tar -cf - applsam | ssh Node_B tar -xf - -C /u02/sam/
Post Clone on Node B
Now you must run your post clone (adcfgclone.pl) on Node B and specify that it is your admin and concurrent processing node
# su - applsam
$ cd samcomn/clone/bin
$ perl adcfgclone.pl appsTier
Use adaddnode and register the new node in the database
After sourcing your environment file you must run the adaddnode.pl script on node A
#su - applsam
$ cd $COMMON_TOP/clone/bin
$ perl adaddnode.pl
The script will prompt you for your APPS user and password and do the required new node entries to the database FND tables.
Use Oracle Application Manager to turn PCP on
Once all the configured services have been started on both the nodes log on to your Oracle Applications Manager and turn the value for the APPLDCP variable to ON. Please make sure to do this change on the application tier context files on both the nodes.
Autoconfig
Shutdown the application tier services of both the nodes and run autoconfig on both the nodes.
After autoconfig completes successfully restart the application tier services on both the nodes.
Verfiy TNSNAMES.ora
Verify that the tnsnames.ora of your application tier has the FNDFS entries of both the nodes
FNDFS_SAMLXA=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=SAMLXA.appsdbablog.com)(PORT=1676))
(CONNECT_DATA=
(SID=FNDFS)
)
)
FNDFS_SAMLXA.appsdbablog.com=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=SAMLXA.appsdbablog.com)(PORT=1676))
(CONNECT_DATA=
(SID=FNDFS)
)
)
FNDFS_SAMLXB=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=SAMLXB.appsdbablog.com)(PORT=1676))
(CONNECT_DATA=
(SID=FNDFS)
)
)
FNDFS_SAMLXB.appsdbablog.com=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=SAMLXB.appsdbablog.com)(PORT=1676))
(CONNECT_DATA=
(SID=FNDFS)
)
)
Also verify that the failover entry exits in the tnsnames.ora of the application tier on both the nodes
SAM_BALANCE=
(DESCRIPTION=
(LOAD_BALANCE=YES)
(FAILOVER=YES)
(ADDRESS_LIST=
(ADDRESS=(PROTOCOL=tcp)(HOST=SAMLXA.appsdbablog.com)(PORT=1571))
)
(CONNECT_DATA=
(SID=SAMP)
)
)
Define and Verify your concurrent Manager definitions
Define the Primary and Secondary nodes for your Standard Manager and Internal Concurrent Manager
Log in to Oracle Applications as the SYSADMIN user and navigate to Concurrent Manager Administer screen.
Also define your Primary and Secondary nodes for your Internal Monitor : Node A and Internal Monitor : Node B. The primary Node for your Internal Monitor Node A will be Node A and the secondary will be Node B and vice versa for the Internal monitor Node B.
Testing Fail Over
You can test the failover process by shutting down node B in which case the the standard manager will failover to the secondary node which is Node B. Once the node comes back alive the concurrent managers will again failback.
Since PCP here is configured in a non RAC environment you cannot have an instance failover here, that is if your DB Node is down the concurrent managers will not failover.
