WL Instance versus Physical Server

          I was under the impression that each instance of a WebLogic server in a cluster ran on its own physical
          server. But now I've been told that you can have a cluster of WebLogic servers running on a
          single physical machine!
          Is this advisable? Is it a common configuration?
          To me, this seems to defeat the purpose of clustering.
          Dave

Yes, cluster load-balancing and failover will work for virtual 2 or n tiered architecture. Physical
          tiering is irrelevant here for these software-based clustering behaviors. What physical tiering is
          relevent for, though, is hardware robustness.
          Gene Chuang
          Join Kiko.com!
          "Ganaraja V Bhat" <[email protected]> wrote in message news:[email protected]...
          > We have 2 instances runing on the same box , but while going through the doc Planning for
          Clustering , i
          > see that lot of emphasis is given on the Physical aspect , rather than the logical .But in our
          case
          > everything is on one box , now will the ckustering work at all the levels (servlet/JSP,EJB)
          >
          > Thanks
          > Neeraj
          >
          > Gene Chuang wrote:
          >
          > > Is your web and app the same server instance, or two instances running on the same box? If the
          > > former, then load-balance will definitely not occur. If the latter, then I believe it will.
          > >
          > > --
          > > Gene Chuang
          > > Join Kiko.com!
          > > "Ganaraja V Bhat" <[email protected]> wrote in message news:[email protected]...
          > > > Hello,
          > > > To make things more clear i am giving the details of the arch being used,
          > > > we have 3 GS140 machines(8 CPU) .In each machine we r installing
          > > > Webserver/LDAP/Weblogic , so that they behave in the cluster mode.
          > > > Will this arch facilitate the fail-over and load balancing at webserver/application layer
          > > >
          > > > ang wrote:
          > > >
          > > > > We could implementing all instances in a single physical server. That requires more high
          power
          > > server in order to achive the similar performance as the mulit-physical server configuration.
          It
          > > would be ok for load balance. But not for fail-over. There is no redunanncy for physcial
          server in
          > > this configuration. A single system crash will lose all services to clients.
          > > > >
          > > > > Ganaraja V Bhat <[email protected]> wrote:
          > > > > >David ,
          > > > > > i am also searching for the right answer as in my project we r using cluster wherein all
          the
          > > machines
          > > > > >have webserver/appserve/ldap i am not convinced with this as i got hold of a whitepaper
          which
          > > clearly says
          > > > > >that we need to have diferent physical layer.........but .....needs more clarifications .
          > > > > >
          > > > > >Looking for the comments from u all
          > > > > >
          > > > > >Neeraj
          > > > > >
          > > > > >David Mrozek wrote:
          > > > > >
          > > > > >> I was under the impression that each instance of a WebLogic server in a cluster ran on
          its
          > > own physical
          > > > > >> server. But now I've been told that you can have a cluster of WebLogic servers running
          on a
          > > > > >> single physical machine!
          > > > > >> Is this advisable? Is it a common configuration?
          > > > > >> To me, this seems to defeat the purpose of clustering.
          > > > > >> Dave
          > > > > >
          > > >
          >

Similar Messages

Two SAP production systems in a single physical server

Dear All,
Is SAP support installing two SAP production systems like SAP ECC 6.0 of one customer and ECC 6.0 with a different SID and instance no. for another customer in a single physical server? Would like to know from the experts is this possible? If yes , what are the things to take care of this design if any?
Thanks
Hany

Hi ,
check below blog
You can check the following blog https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5124. [original link is broken]
It helps you to understand different logon pages for portal
Koti Reddy

Multiple entries in the DAD file but one physical server

Can someone confirm (point me in the right direction for documentation) that we can have multiple DADs on the same physical server. A typical situation is where there are separate LIVE and TEST database installations of APEX but the one apache server. So, how do I get the TEST and LIVE to have different DAD configurations, in particular the location of the images file ie the alais '/i/'.
Our situation is a great deal more complex than my example above, as we could have in excess of 6 different APEX installations on the same physical server with each having to have a different location for the image files etc.
Thanks in advance

Hello,
Each dads.conf file can include several, unique, <Location> directives, according to your needs.
As the aliases are being defined outside a specific directive, it seems that you'll need to use different alias to each APEX instance.
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Mutiple instance for messaging server

Can I set up mutiple instance of messaging server in one physical server ? The purpose is to separate domain to use difference resource, configuration. Now we use JES verion 6.

Can I set up mutiple instance of messaging server in
one physical server ? The purpose is to separate
domain to use difference resource, configuration. Now
we use JES verion 6.While I don't know if it supported(I think it wasn't but we needed to make it work while JES is still in transition about HA strategy), I did an installation of 3 JES2004Q2 messaging instances on 3 different hosts that were all in the same Veritas Cluster. With this configuration, we were able to have any messaging instance run on any host in the cluster (and could shift them so all 3 instances were running on a single host without problem, which we did several times)
Each host had a SAN partition mounted as
/usr/iplanet-$host
such as
/usr/iplanet-host1
/usr/iplanet-host2
these partitions were able to be moved between hosts as needed by the cluster software.
On each host, I made sure it had the SAN mount in place, then installed messaging as:
/usr/iplanet-$host/msg61
(instead of /opt/SUNWmsgsrv)
and when I ran /usr/iplanet-$host/msg61/sbin/configure
I said that the data directory should be:
/usr/iplanet-$host/msg61/msg-$host
I installed the admin server as:
/usr/iplanet-$host/admin5
On each of the messaging instances, I ran the ha_ipconfig script to lock down the IP address that the server processes bound to (and also had to lock down the ens daemon using a separate configutil variable, it still listened on the wildcard address).
When I was configuring the admin servers, I made each instance's run on a seperate port number so I didn't need to worry about locking down the IP. We also had to make a slightly customized version of the VCS agent that Sun supplies to work with the model we decided on.
There are still some issues, such as with performing patches. To patch an instance, you would need to make sure it is running on the host that it was originally installed on. If you only have a single host, I don't think the technique I used would work for you (unless you are able to use Solaris 10 beta and the zones functionality, and I am not sure if the JES packages play well with it yet)

How to migrate Sun One directory server to a new physical server install

need help
We have to move our existing installation of sun on directory server 5.2 to a new physical server.
We have a new physical server with a new host name. I am trying to find an easiest way to take a snapshot of our existing server and put it on a new installation
So will installing sun one directory server , its shows me two choices either to create a new instance or copy configuration from a existing server
What do i choose and which is the fastest route to replicate my old server
Thanks a bunch in advance
Sganb

Hi,
I'm glad you're still using the old, glorious Sun One Directory Server 5.2, because it brings me back a lot of memories... But are you seriously talking of the 'plain' version, with no patches/hot fixes on top? If that's the case, you're using of a software that has been developed in 2004 and released in Jan 2005! Just for you to be aware, in the last *8* (eight) years a considerable number (in the magnitude of 10^3) of bugs, security problems and performance issues has been identified and fixed...
However, to provide a better answer to your question, it would be important to understand the 'big picture' in terms of scenario and requirements:
1) Is this a critical 24x7 service for which you need to perform an on-line migration or you have a 'maintenance window' during which the service may be switched off?
2) Is the old server member of replication environment? If yes, how many masters/slaves do you have already? Shall the new server be part of this topology? What role shall it have?
3) Would it be possible to make the the old server able to communicate with the new server?
4) How big is the database that you've got to migrate? Do you have any requirement in terms of caches?
5) Do you take backups on a regularly basis and have in place working (*tested*) backup/restore procedures?
6) Is the new server conserving or changing the O.S. and architecture? [SPARC->SPARC, x86->x86, SPARC->x86, Solaris -> ? , 32 .vs. 64-bit? ]
7) What are the steps you did to 'install' the software on the new server?
Thanks,
Marco
P.S.: I don't wanna sound 'scaring' with all these questions, neither this should be intended as an 'hidden advertising' for Oracle Professional/Consulting Services, but the only way to not put in jeopardy your data is being aware of the risks, having the control of what's going on and ... possibly have a 'B' plan ;-)
P.S.S.: My last suggestion is to consider a migration to a later release AS SOON AS POSSIBLE; the latest is ODSEE 11.1.1.7, which is available here:
http://www.oracle.com/technetwork/middleware/downloads/oid-11g-161194.html
and seems to work pretty well ;-)

Maximum number of domains per physical server

I am curious as to whether or not there is a maximum number of domains per physical server. Is it just based on resources, i.e. memory, hdd space, etc. or does Oracle have it's own specific recommendations? I realize, as implied, that one could put a number of vm's on a server that would utilize the server ram up to an amount reserved for the OS.
Just wondering if there is a recommendation.
By the way, we are running WLS (10.0MP1) and OSB (3.0) on top of Win2K3.
Thanks for nay info,
Todd

Typically it depends on the resources.
If the WLS instances are heavily utilized, at some point having more JVM's than the number of cores impacts performance if the apps are CPU bound. Similar applies for apps that use a lot of memory or sessions. There is no blanket answer and there is no hard and fast limit.

Should the Weblogic machines be created on each physical server?

Hi,
In order to have a cluster configuration, should the Weblogic machines be created on all physical servers involved in the cluster?
Thank and Regards.

If I well understand, there should be one machine per physical sever. Correct?
YesWhen creating a machine, what should be the Listen Address and the Listen Port?
It shud refer to IP and port of your remote serverShould the IP address be explicitly the IP address of the physical server on which the machine is created or the hostname of the physical server (for instance localhost)?
Hostname/IP addressWhat id the machine is created in one server, but it s meant for a remote physical server?
You create machine in Weblogic Server Console running on say Physical Server 1, you need to specify IP & Port of remote server which will be running the actual service.Should the Listen Port be the port on which the Node Manager listens or not?
No, it shud be different.Refer: - http://middlewaremagic.com/weblogic/?p=971
- Akshay

Physical Server Clustered Migration to Virtual Machine

Dear All,
We got an request from SQL server running on physical server migrate to virtual machine.
Please advice me the procedure and checklist for this migration request.
Thanks.

Hi mailatdinesh,
If you want to run SQL Server in a virtual machine (VM), here are some of the essential tips for virtualizing SQL Server.
1. To support bare metal virtualization platforms, you need to make sure that the host uses a 64-bit x64 processor; In addition, for a resource-intensive workload like SQL Server, it's vital that the host processor supports Second Level Address Translation.
2. SQL Server can automatically take advantage of multiple CPUs if they're present. If you're migrating from a physical SQL Server implementation to a virtualized SQL Server implementation, you can use the number of CPUs in the physical implementation as
a guide for the number of virtual CPUs that you'll configure in the SQL Server VM.
3. In order for SQL Server to take advantage of dynamic memory, I recommend you to use the Enterprise edition of SQL Server 2008 or later or using the Datacenter edition of SQL Server 2008 R2 or SQL Server 2008.
For more information , see:
http://sqlmag.com/sql-server/sql-server-virtualization-tips
When you migrate one instance from one server to another, as other post, you can use backup and restore, the sp_detach_db and sp_attach_db stored procedures, or
the Import and Export Data Wizard to copy objects and data between SQL Server databases, you also need to transfer logins and passwords between instances of SQL Server, move jobs, alerts and operators. For more information, you can refer to the following
article,
http://support.microsoft.com/kb/314546
There is also similar issue about moving SQL Server to VM, you can refer to the following post.
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/43085f0f-4526-4994-be95-530aecb5dd7c/moving-sql-server-to-vm
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

Error"Failed to open the connection" - Named Instance of SQL Server 2005

"Failed to open the connection" error, when connecting to the Named Instance of SQL Server 2005
The report is throwing error, when changing the logon information dynamically through C#.
Code
     string reportPath = @"D:\NET\TestReport\TestReport.rpt";
     ReportDocument reportDocument = new ReportDocument();
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          tableLogonInfo.ConnectionInfo.UserID = "sa";
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          table.ApplyLogOnInfo(tableLogonInfo);
     crystalReportViewer1.ReportSource = reportDocument;
Error Message
     Failed to open the connection.
     Failed to open the connection.
     C:\DOCUME1\PUGALE1\LOCALS~1\Temp\{DF9593A5-5C80-4CBC-ABC3-EC4EF204A7EB}.rpt
The error is occuring only whenever i am connecting to the Named Instance of SQL Server 2005.
Thanks in Advance
Edited by: pugalendran p on Feb 2, 2009 10:32 AM
Edited by: pugalendran p on Feb 2, 2009 10:43 AM

Hi,
Following solution might help you to resolve the issue.
Solution1:
Issue happens because universe connection to the Database is not responding and the Data Source Name is not configured to write SQL Server 2005 database.
Resolution
Created new DSN connection under SYSTEM DSN to SQL Server 2005 Database.
Import the universe from the designer.
Go to File->Parameters.
Edit Connection.
On the Database Middleware Page expand SQl Server 2005->Select SQL Server 2005 driver.
Change the DSN to new DSN connection
Test the connection.
Save the Universe and Export it to the repository.
Solution2:
I am taking Oracle as an example over here.
This can be caused when the SQLNET.ora is located in a remote location using mapped drives.
Resolution
To resolve,
check the registry [HKLM\SOFTWARE\ORACLE] you should see a folder called HOME0
look for any paths that contain a mapped drive partition
Change the mapped drive letter to a UNC path (
server\folder)
Open a command prompt and do a tnsping using the tnsname and verify the location of the SQLNET.ora or TNSNAMES.ora
If the path is not updated to the new path
Reboot the server
Regards,
Sarbhjeet Kaur

Tomcat : Hlow to run more than 1 instance of tomcat server on same machine?

Hi,
How to run more than 1 instance of tomcat server on the same machine.
I use tomcat 5.5. ,updated port number for second instance and tried to run,it takes the same old port number .No batch file available with this version to update the home directory to second instance to run the second server..
How to work on clustering and load balancing on tomcat server?
Any inputs?
Thanks in advance..
Ani

Anitha123 wrote:
We have only 1 dedicated server maintained by third party for hosting..
If are only getting your site hosted, then, normally, the host would handle clustering (to your sepcifications, of course, but it is normally the hosts responsibility).
If i need to implement clustering and load balancing for tomcat server then do we need to go for 2 different servers for production environment?
Yes, you would need two, or more, servers.
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It should have no (or at least minimal) impact on the code (as long as you are using beans, sessions, and the other components properly). It is handled by the web container (by the tomcat in this case). The tomcat documentation should show how to set it up (if it supports it all, I don't know, we don't have Tomcat at work, and at home I use only a single).

WIll multiple instances on same server use same SA by default?

I have a SQL server on which I've created a second instance using Windows authentication. I never created an SA account or password during installation of the new second instance.
In Security > Logins, I see SA. Is this the same account as the one in the other instance. I don't know the other instance's password, so if I change it in the new instance will it be changed in the previously existing instance as well?
Thanks,
Scott

Hi,
SA account will be created as a part of the SQL install and we don't get to specify a passowrd while installation when windows authentication is chosen. This is the reason why the SA is disabled if you check in the mgmt studio after SQL installation. Try
logging in using the admin account that you have provided for the SQL server instance during the Sql install, This will allow you to enable the SA account and you can change the password.
This won't let you to login using SA acount unless you have changed you authenticaion mode to MIXED @ Security tab on Server properties. Restart of the instance is required to bring this change into effect. Now you can login using SQL authentication
specifying the SA account and password.
No SA accounts on different instances of SQL server are same. They are unique per instance and changing the password on one SA account for an instance doesn't have any affect on the others.
Hope this helps,
Many Thanks
BHanu

Multiple instances on single server

Hi all,
I have a Solaris 10 server with 2x dual core CPU's.
I am wondering if it was at all possible to install Business Intelligence Server on this single OS twice? And if it is, can I split the CPU between the different instances?
The reason for this is that I would like both production and test/development installed onto the same OS to cut costs. But I don't want the test/development instance to use resources that would affect the performance of the production environment.
Ideally I'd like the 2 instances, with the production instance using 3 cores, and the test/development instance using 1 core. If the RAM could also be split that'd be great.
Thanks for your help in advance.
Cheers

Yes, you can have multiple instances of Presentation Services (PS) ([see my blog posting for details|http://rnm1978.wordpress.com/2009/08/25/multiple-rpds-on-one-server-part-1-the-bi-server/]) which would let you split envs, but you'd do that with a single instance of BI server. I don't know if it's possible to run multiple BI servers
I don't think you should be trying to do this anyway, several reasons why not:
1) It's not supported to run multiple PS on one server. That should be reason enough not to do this on prod.
2) If it's not possible to run multiple BI Servers on one server then you'd end up running one BI Server with dev/test/prod RPDs - you'd never be able to bounce your BI Server for dev work without taking down prod
3) Any time you needed downtime for dev, you'd affect prod
4) Any patching you wanted to do on dev might affect prod
5) Any experimental work you do that crashes dev would affect prod.
If you only have the one box available to you for costs reasons then you should be looking into virtualisation of some kind, eg http://www.virtualbox.org

How can I create a new OC4J Instance in Application Server Control

Hi All,
Is there any way to create a new OC4J Instance in Application Server Control of installed SOA Suite, so that it gets listed in Cluster Topology page.
Thanks
Krrish

Hi Eric,
Thanks for the reply.
it is pretty simple..which I didnt try earlier..
Thanks
Krrish

Server 2012 R2 ISO download is larger than DVD, how do I install on a new physical server?

I have downloaded Server 2012 R2 (not the trial version) and the size of the ISO is 5.2Gb. I get 'disc image file is too large' error when trying to create image on DVD. How do I install 2012 R2 on a new physical server?

Does your server have an out-of-band management console? Those can generally mount virtual media that is simply a file residing on the machine you are using to connect to the console.
Another option is to use USB -
https://technet.microsoft.com/en-us/library/dn293258.aspx
. : | : . : | : . tim

How to install two instance on one server

Dear Guru,
I want to install two instance on one server.
I have installed IDES server ( win 2k3 64 bit with SQL 2005 ECC 6.0)
Drive is
c: 20 GB for os
d: 5 gb swap
e: 5 gb swap
f: 450 GB database.
The same server i want to installed SOLMAN 4.0 with sql 2005.
Please suggest me how to installed without affcting IDES server.
Amol

Hi,
You only have to consider 2 things :
1. SAPTRANSHOST entry in hosts file will be the same for both systems
this mean that both systems will share the same transport directory
Regards,
Wojtek
This is not true. Your SAPTRANSHOST will remain the same, but you can (and should) specify independent trans directories with the DIR_TRANS and and EPS profile parameters to designate where the instance trans files should be located (i.e. /usr/sap/trans_SID). I recommend you make this change in the existing host first, and then clear out the trans directory. Let the 2nd instance install into it and then alter that one too (thereby moving the files to the new /usr/sap/trans_SID2).
Edited by: David Ingersoll on Jan 31, 2008 3:12 PM

WL Instance versus Physical Server

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