on 03-07-2013 11:04 AM
Hi,
We ahve PRD server in Cluster environment.If cluster fails , node will be moved from one node to another?
At that time, What are the actions taken from BASIS?
Hi....
Please use this link.you will get more idea and you will know about actions taken from BASIS.
http://help.sap.com/saphelp_nw04/helpdata/en/08/5744e44ae611d1894f0000e829fbbd/content.htm
Regards,
Prabaharan B
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Dheen AJ,
This is a very good question.
I would suggest that you periodically check your cluster by switching over in a planned operation. When doing this you can monitor your enqueue replication and see that it is functioning properly.
And an Excerpt from another blog.
Monitoring the Lock Table at Failover
Use program enqt to check the fill level of the lock table and the failover ID. The SCS instance of the SAP system has been started.
Start program enqt on the server on which the replication server is installed. Then use the enqt options described here. Otherwise you could damage the content of the lock table.
Monitoring the Fill Level of the Lock Table at Failover
...
- 1. Enter the command below to fill the lock table of the enqueue server with 20 locks: enqtpf=/usr/sap/<SID>/SYS/profile/<SID>_ERS11__<hostname> 11 20
- Monitor the fill level of the lock table by executing the command:
enqt pf=/usr/sap/<SID>/SYS/profile/<SID>_ERS11_<hostname> 20 1 1 9999This command permanently reads the content of the lock table and shows the number of lock entries on the
- console.
Monitoring Lock Table ID at Failover
...
- Enter the following command on the ERS host to output the lock table ID before the failover:
enqt pf=/usr/sap/<SID>/SYS/profile/<SID>_ERS11__<hostname> 97
- Trigger a failover of the SCS instance.
- Enter the command
enqt pf=/usr/sap/<SID>/SYS/profile/<SID>_ERS11__<hostname> 97The output for the row containing EnqTabCreaTime/RandomNumber should be exactly same before and after failover should be different .
- Make sure that the lock table ID is the same before and after the failover. If it isn’t, the replica has not been copied .
4. Commands to check status of ERS/SCS instances
To monitor the status of ERS/SCS instances, the commands described below may be used (for example in HA scripts):
ERS Commands
To determine the replication server enter the following command:
ensmon pf=/usr/sap/<SID>/SYS/profile/<SID>_ERS11_<hostname> 2
If replication server is active and connected to SCS, the following message is displayed in the first few lines of the output:
Replication is enabled in server, repl. server is connected
Replication is active
The status may also be checked with the command "startsap check", however, this command seems to check only the process at the OS level, not for the functioning of the process.
SCS Commands
Send a dummy request to the server, to check if it is alive:
ensmon –H < scshostname> pf=/sapmnt/<SID>/profile/<SID>_SCS04_< scshostname> 1
Last line of output contains the message "Dummy request executed successfully with rc=0
The status may also be checked with the command "startsap check", however, this command seems to check only the process at the OS level, not for the functioning of the process.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
well, not the node will be moved (failing over) but hopefully some Windows Cluster Groups.
>>At that time, What are the actions taken from BASIS?
That depends on the version of your SAP release.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
hi Anvar,
please check the point#10 from below SAP note, hopefully, it might be helpful.
Note 112266 - SAP and MS Cluster Server: Frequent questions and tips
Regards,
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
User | Count |
---|---|
84 | |
25 | |
12 | |
9 | |
6 | |
6 | |
5 | |
5 | |
4 | |
4 |
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.