Cache Coherence in a cluster environment.

Hi All,
We use an External Facing Portal to support our clients. The architecture involves a set of 4 application servers with two nodes each. Right now, to increase performance, we store objects using ICacheService in the heap to avoid unnecessary calls to the backend . I would like to know if there is a means of having a Cache Coherence set up among the servers which can enable us to have better control of the cached data , improve performance and avoid redundant data in the servers.
Please suggest.
Thanks in advance,
Padmaja.

Hi,
Can you provide any solution/information that you may have implemented. We have a similar requirement so am looking out for the best approach available.
Regards,
Melwyn

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Forced user logged out in cluster environment

          Hi there,
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          the user gets kicked out of the system at random. This could possibly be either
          as a result of httpsession not getting replicated on the secondary server instance
          or the request not getting routed to the right server. Has any one experienced
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          prob no longer occurs!
          Any help would be appreciated.


We have 2 managed server instances (WL7.0sp2) in our cluster          > environment. Under heavy load, the user gets kicked out of the
          > system at random. This could possibly be either as a result of
          > httpsession not getting replicated on the secondary server instance
          > or the request not getting routed to the right server. Has any one
          > experienced this problem before? When the proxy server is by-
          > passed using a custom app, the prob no longer occurs!
          Yes, I've seen it under heavy load. I'm not sure what it is, though. It
          sounds, in your case, that the problem is in the proxy. Perhaps it is
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          sometimes).
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com/coherence.jsp
          Tangosol Coherence: Clustered Replicated Cache for Weblogic
          "Bala" <[email protected]> wrote in message
          news:[email protected]..
          >

Scheduling,Email Setup in cluster environment and multiple job servers

Hello All,
I have to schedule and email instances of crystal reports to users in PDF and excel format. A Clustered environment of Business Objects 3.1 SP3 is been setup on 2 servers. There is 2 instances of crystal reports Job server been created.
My question is If there are multiple instances of job servers then should we have to configure mail settings on both instances of job server or not?
And secondly, in cluster environment the email settings and scheduling of the reports should be setup on both CMS servers( CMS server 1 and CMS server 2) or should CMS server 1 should be enough?
Thanks in advance.

You have a couple of options here.
1. You can either set up email on all of the job servers on both CMS' in the cluster. This is actually the easiest to manage.
2. You can set up email on some of the job servers on one or the other CMS. However, at this point you would also have to set up a server group that contains the job servers that are set up for email, plus the RAS server - you might also have to include the Crystal Cache server and the Crystal Processing server. Then ALL of the reports that are sent via email would have to be scheduled run ONLY on the server group that contains the email-enabled job server(s).
-Dell

TimesTen database in Sun Cluster environment

Hi,
Currently we have our application together with the TimesTen database installed at the customer on two different nodes (running on Sun Solaris 10). The second node acts as a backup to provide failover functionality, although right now only manual failover is supported.
We are now looking into a hot-standby / high availability solution using Sun Cluster software. As understood from the documentation, applications can be 'plugged-in' to the Sun Cluster using Agents to monitor the application. Sun Cluster Agents should be already available for certain applications such as:
# MySQL
# Oracle 9i, 10g (HA and RAC)
# Oracle 9iAS Application Server
# PostgreSQL
(See http://www.sun.com/software/solaris/cluster/faq.jsp#q_19)
Our question is whether Sun Cluster Agents are already (freely) available for TimesTen? If so, where to find them. If not, should we write a specific Agent separately for TimesTen or handle database problems from the application.
Does someone have any experience using TimesTen in a Sun Cluster environment?
Thanks in advance!

Yes, we use 2-way replication, but we don't use cache connect. The replication is created like this on both servers:
create replication MYDB.REPSCHEME
element SERVER01_DS datastore
master MYDB on "SERVER01_REP"
transmit nondurable
subscriber MYDB on "SERVER02_REP"
element SERVER02_DS datastore
master MYDB on "SERVER02_REP"
transmit nondurable
subscriber MYDB on "SERVER01_REP"
store MYDB on "SERVER01_REP"
port 16004
failthreshold 500
store MYDB on "SERVER02_REP"
port 16004
failthreshold 500
The application runs on SERVER01 and is standby on SERVER02. If an invalid state is detected in the application, the application on SERVER01 is stopped and the application on SERVER02 is started.
In addition to this, we want to fail over if the database on the SERVER01 is in invalid state. What should we have monitored by the Clustering Agent to detect an invalid state in TT?

Does OWF Support a Cluster environment?????

I have a Cluster environment. I have an IP for Node 1 (xxx.xxx.xxx.001), another IP for Node2 (xxx.xxx.xxx.002), another IP for the Cluster (xxx.xxx.xxx.003) and another IP for the Database (xxx.xxx.xxx.004)
I have installed OWF in both nodes and I created the OWF repository in Oracle (user OWF_MGR). Its right?
Does OWF Support a Cluster environment?????
What do I have to configure if I want High availability for Oracle Workflow????
Thanks in advance!

Hi,
Every servernode runs in its own java process.
Every java process has its own heap where it works in, with normal use its not possible to share memory between servernodes so also not caches that are stored in memory.
The only components that are shared in a Java "cluster" are the SCS instance that contains the Message and Enqueue Server, the DB, and the shared file system /sapmnt.
Try investigating JNI... search for "Java JNI Shared Memory"... this will need custom development and seems to be very low level and complex... If it was easy I guess SAP might had implemented in there WAS Java I gues.
Also take a look at:
http://www.google.nl/url?sa=t&source=web&ct=res&cd=1&url=http%3A%2F%2Figuanaworks.net%2F~shucker%2Fppt%2FJaDiSM.ppt&ei=3OqmSY6pF8Ov-QakpJnGAg&usg=AFQjCNFZCeSE-PIRpVIN39TDtGaeXMAKHA&sig2=mSGrGSf-5hT7roefFDj0lw
and
http://www.google.nl/url?sa=t&source=web&ct=res&cd=2&url=http%3A%2F%2Figuanaworks.net%2F~shucker%2Fpapers%2FJaDiSMPaper.doc&ei=3OqmSY6pF8Ov-QakpJnGAg&usg=AFQjCNF0cozxeRsKdOoHlynHWCdCv1zDmA&sig2=upwiB0HKiyxYJHaCZWiIeg
Good luck!
Benjamin Houttuin

Using Optimistic Concurrency in a cluster environment

Hi,
In weblogic 8.1 sp3 cluster environment, I deployed CMP Entity Beans with the following settings:
In weblogic-ejb-jar.xml:
<entity-cache>
<concurrency-strategy>OptimistÂic</concurrency-strategy>
<cache-between-transactions>trÂue</cache-between-transactionsÂ>
</entity-cache>
In weblogic-cmp-rdbms-jar.xml:
<verify-columns>Version</verifÂy-columns>
<optimistic-column>VERSION</opÂtimistic-column>
And I deployed the CMP Entity beans into a cluster which has two managed servers.
When I only do findByPrimaryKey, on both managed servers, the cache-between-transaction functions well and only call ejbLoad() when it first loads that Entity Bean Instance.
However, If I do any updates to this bean, the performance change. After the updates, I issued a lot findByPrimaryKey calls for this bean to test. If the call reach the managed server where the update for the
bean happens, it is fine and still perform like cache-between-transaction. But if the call reach other managed servers, the ejbLoad() get called for that bean in every transactions; and cache-between-transaction seems to be disabled on the other managed servers since the updates.
I test this senario a lot of times and the problem is very consistant. According to my understanding, the other managed servers should only do ejbLoad() at the first time after the updates happened, and the transactions after that shouldn't call ejbLoad everytime.
Does anyone encounter the same problem like this? And is there anyway to optimize it?
Thanks!!

Did you figure out how to do this? We ended up having to track the number of sessions using the service and close it only when there were none. However, this did not solve the problem completely. There seems to be a conflict when running our servlet app (which uses PAPI) on different machines talking to the same BPM. A thread on one machine opens, uses, closes a session and service while a thread on another machine opens a session and in the middle of using it, it dies.

SBO Mailer in a cluster environment

Hi,
I am currently facing an issue where when I install SBO Mailer on a cluster environment, the installation removes applications and license manager for some reason gets uninstalled.. When I want to uninstall the SBO Mailer, I do not see it under the Control Panel and neither do I see it in running in services. But if i look at the Service Manager the SBO Mailer Service is running.
The strange part is that after this installation, there is an add-on that stopped working.
Has anyone come across such a scenario?

Hi,
To uninstall you have to first run the Server tools and there you can uncheck the sbo mailer. There is not way you can uninstall SBO mailer service and you cannot find it under control panel its a service...not an applicaiton.
Run the server tools and then choose repair.
Regards,
Rakesh N

Deploying Java Web Application (WAR-File) into a cluster environment

Hi,
we have a web application which has to read from and write to the file system.
Since a short time we have a cluster environment (2 parallel servers) and since thisa time we have the problem, that files are worked double in the cluster. The application is working on both servers now and so we have this problem.
Does anybody know how we have to deploy the application correctly in a cluster environment or do we have to change anything in our source code of the application?
I didn't find any documentation about this.
At the moment we have deployed the application on one of the two servers only, but I think there must be a better way to solve this problem.
Thanks for your replies.
Regards
Thorsten

Hi,
I think first you need to wrap it into an EAR file, then you can deploy it.
As far as I know standalone deployment of WAR is deprecated as of 640.
similar threads:
How to deploy .war on NWDI
Deploying an existing WAR file into the Portal
Hopefully this tutorial also gives some idea:
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/70/13353094af154a91cbe982d7dd0118/frameset.htm
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Ervin

PI 7.1 in a cluster environment (multiple ip-adresses): P4 port

We want to install PI 7.1 on unix in a cluster environment.Therefore we installed also DEV+QA with virtual hostnames like the prodsystem, which will be later installed.
At all sapinst installation screens we have used only the virtual hostname <virtual-hostname-server interface>.We have also set the SAPINST_USE_HOSTNAME=<virtual-hostname-server interface>. Although the P4-port seems to have used the physical hostname: in step 57 of sapinst we got problems and in dev_icm were:
[Thr 05] *** ERROR => client with this banner already exists:
1:<physical-hostname>:35644 {000306f5} [p4_plg_mt.c 2495]
After we have set
icm/server_port_1 = PROT=P4,PORT=5$$04, HOST=<virtual-hostname-server interface>
icm/server_port_6 = PROT=P4,PORT=5$$04, HOST=<virtual-hostname-user interface>
icm/server_port_7 = PROT=P4,PORT=5$$04, HOST=<physical hostname>
icm/server_port_8 = PROT=P4,PORT=5$$04, HOST=127.0.0.1
the sapinst was successfull.
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Our productive system PX1 will live in a HA environment, so we don't want to use the physical hostnames in any profile.
Our environment will look like:
HOST-A (<physical-hostname-A>):
<virtual-hostname-server interface>
<virtual-hostname-user interface>
HOST-B (<physical-hostname-B>):
Normally our prodsystem will live on Host-A (physical-hostname-A). All parameters should
only take the virtual hostname <virtual-hostname-server-interface>. During switchover the
virtual hostnames (server and user interface) will be taken over to HOST-B, while the physical
hostnames of HOST-A and HOST-B will stay like there are.
How do the parameters have to be set here ?
Have also the physical hostnames of both cluster nodes set in the
instance profile, e.g:
icm/server_port_1 = PROT=P4,PORT=5$$04, HOST=<virtual-hostname-server interface>
icm/server_port_6 = PROT=P4,PORT=5$$04, HOST=<virtual-hostname-user interface>
icm/server_port_7 = PROT=P4,PORT=5$$04, HOST=<physical-hostname-A>
icm/server_port_8 = PROT=P4,PORT=5$$04, HOST=<physical-hostname-B>
icm/server_port_9 = PROT=P4,PORT=5$$04, HOST=<localhost>
Any recommendations ? In note 1158626 is some infomation regarding P4 ports with multiple network interfaces, but it's not 100% clear for us.
Best regards,
Uta

Hi Uta!
Obviously we are the only human beings in the SAP community having this problem. Nevertheless let's give it another try with a - hopefully - more simple problem description (and maybe it will be helpful to copy and paste this description into the open SAP CSN also).
So here comes the scenario:
We have one physical host:
Physical hostname: physhost
Physical IP address: 1.1.1.1
On this physical host there is running one OS: SUN Solaris 10/SPARC
On top of this we have two virtual hosts where we install 2 completely independent PI 7.1 instances with separate virtual hostnames and separate virtual IP addresses and separate DB2 9.1 databases. That is this is not an MCOD installation.
Virtual Host no. 1 is PI 7.1 Development System:
Virtual hostname: virthostdev
Virtual IP address: 2.2.2.2
Java Port numbers: 512xx
Virtual Host no. 2 is PI 7.1 QA System:
Virtual hostname: virthostqa
Virtual IP address: 3.3.3.3
Java Port numbers: 522xx
With this constellation we face serious problems with the P4 port. Currently for example the JSPM for virthostdev does not start, because JSPM cannot connect to the P4 port.
In SAP note 1158626 we have learned that by default always the physical hostname/IP address is used to address the P4 port and that we have to configure instance profile parameter icm/server_port_xx to avoid this.
So how do we have to configure the instance profile parameter icm/server_port_xx for both systems to resolve these P4 port conflicts?
Additionally: Is it important to use distinct server port slot numbers xx in both systems?
Additionally: Is it possible to configure this parameter with hostnames instead of using IP addresses?
So far we have tried several combinations, but with each combination at least one or even both systems have problems with that f.... P4 port.
Please help! Thanx a lot in advance!
Regards,
Volker

Steps to upgrade kernel patch in AIX cluster environment

Hello All,
We are going to perform kernel upgrade in AIX cluster environment.
Please let me know the other locations to copy the new kernel files ,
default location
CI+DB server
APP1
Regards
Subbu

Hi Subbu
Refer the SAP link
Executing the saproot.sh Script - Java Support Package Manager (OBSOLETE) - SAP Library
1. Extract the downloaded files to a new location using SAPCAR -xvf <file_name> as sidadm.
2. copy the extracted files to sapmnt/<SID>/exe
3. Start the DB & Application.
Regards
Sriram

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Hi all,
We are planning to move our existing standalone server R/3 production server to cluster environment.
I have some queries regarding this migration
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1. Central Instance has to be installed in local disk or shared disk
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Thanks & Regards
KT

Hi, the best place for your questions would have been the forum SAP on Windows.
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OSB Polling in Cluster Environiment

Hi ,
I created a OSB Poller which will read data from DB. When I test it in a single server it is working fine but when I move it to cluster environment with two managed servers it is polling Twice from the DB and the reports are generating twice . I have changed the JCA Property <Lock>lock-no-wait</Lock> even then it is polling twice. Any solution Please ?

Hi:
Maybe this link can be useful
http://javaoraclesoa.blogspot.com.au/2012/04/polling-with-dbadapter-in-clustered.html
Regards,
RK
Edited by: RK.. on Dec 16, 2012 7:54 PM
Edited by: RK.. on Dec 16, 2012 7:55 PM

How to setup the cluster environment for BPM using weblogic

want to setup the cluster environment for BPM using weblogic....
i have installed the oracle weblogic server 10gr3 and oracle BPM enterprise for weblogic 10gR3
i have used the Admin tools from the "oracle BPM enterprise for weblogic" to setup the configuration and create the weblogic domain servers.
i can launch the process administrator and import the project exp file to domain server.
but what should i do to setup cluster environment using weblogic?
what i want to do is :
setup one admin machine..
setup two product machine..
enable the cluster so the admin machine can monitor the status of the product machine..
thanks a lot ...

The install guide at http://download-llnw.oracle.com/docs/cd/E13154_01/bpm/docs65/config_guide/index.html gives a reasonable amount of info on how to do this.
Personally I have not used the OBPM option to configure WebLogic instead I've used the information in the above install guide to create the weblogic domain in advance of configuring OBPM.
Once you've setup WebLogic configure OBPM using the values I mention in the following thread: How to set the JMX Engine parameter in Process Administation?
Let me know any specific config questions and I'll do my best to answer them for you.
Thanks,
Mike

Changing the listener port number in a cluster environment

Hello,
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1) Take the listener offline via Oracle Fail safe
2) stop the original listener from the command line
3) change the port number in the listener.ora file & save
4) start the original listener
5) bring the listener online in Fail safe
6) register the listener in the database with ALTER SYSTEM SET LOCAL_LISTENER....
After all this, when i check the status of the listener via lsnrctl, i see that the new port number is used, however in the Fail safe administrator, I still see the default port 1521. How do I go about changing the port number so that Fail safe also registers the change?

I did troubleshooting to verify the group, but this just changed the port number back to the default in the listener.ora & tnsnames.ora.
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Installation of CRM 2007 in Windows with oracle and cluster environment

Dear Experts,
We are about to start the installation of CRM 2007 (ABAP+JAVA) with
Oracle 10g on Windows x64 in cluster environment. In the SAPINST dialog
box under High availability option, I could see installation options like ASCS
Instance, SCS Instance, First MSCS node, Database Instance, Additional
MSCS Node, Enqueue Replication Server, Central Instance and Dialog
Instance.
I have gone through the installation guide. I have below queries
regarding the same. Can you please clarify the same
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with sap service running in Node A and Database running in Node B. Can
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and dialog are said to be installed locally on any one node in MSCS or
in separate server. As per my understanding Dialog instance will be
used for load balancing which we do not require now. Hence I feel this
is optional in our case. Where as Central Instance I am not able to
understand why this option is for? Is it mandatory to be installed or optional. If
so, when I installed it in one of the MSCS node the incase of failover
how does it effect the system. As per my understanding ASCS and SCS
comprise central instance.
Please clarify and thanks in advance.
Regards,
Sharath Babu M
+91-9003072891

I am following as per the standard installation guide.
Regards
Sharath

Cache Coherence in a cluster environment.

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