Multiple SAP systems on a Single LPAR

[Former Member]

Hi Gurus,

We are planning to install ECC, BW, SRM, PI, EP, SolMan, NWDI on one LPAR on IBM i6.1 OS. I came to know that this is the common practice of installing SAP on IBM iseries.

Do I need to review for any dependencies or the technical limitations?

Obviously, the DB2 instance will be the same for all these systems and will be a MCOD solution.

If you have done any recent installations on IBM iseries, please let me know the lessons learned.

Thanks

Kalyan

[Former Member]

Hi my friend

No problem to have multiple instances installed in one LPAR, like you said it's the common way to place your non-prod environment. Just make sure that OS level parameters of AS/400 are well tuned for this many instances running together from performance perspective, use IT4J JVM for AS Java instead of classic JVM. Here's some FYI:

Note 484548 - iSeries: 3 tier system installation

Note 192658 - Setting parameters for BW systems

Note 541508 - iSeries: Checking the system parameters for BW

Note 307077 - iSeries: Performance optimization for BW systems

Note: installing multiple instances in one LPAR doesn't mean it's a MCOD installation. They still have their own DB library, known as database on other platforms. In the case of MCOD, all instances will use the same DB library as database instance.

Regards,

Effan

[Former Member]

Hi Yu,

This is a great reply. I have a question related to database. If it is not a MCOD type solution on iseries, Can I assume that we can have different DB2 SID's for different SAP systems?

I read that when we install multiple SAP systems on single LPAR, each system will have its own DB library such as 'R3<SID>DATA'. But what should we input for the DB2SID during the installation? I assume we should give the same DB2 SID for all the SAP systems.

Please let me know.

Thanks

Kalyan

[Former Member]

Unlike on other platforms, there's no DB2<SID> since on AS/400 database has been fully integrated with file system. The only library you could name is kernel library. In the screen of installation parameter review, you could find all details.

Regards,

Effan

[Former Member]

Effan,

So I assume that during the installation I need to provide the Kernel library name, and the SAP installer will create the R3SIDDATA library for me. Or do I need to create this library prior to the installation?

SAP installation guide mentions that the DB2SID is always same as SAPSID in IBM i.

You have provided very useful information. I have provided the well deserved points.

Thanks

Kalyan

[Former Member]

Thanks much for your points. There are some preliminary tasks but no need to create libraries, here:

Note 428855 - IBM i system values

Note 1234382 - IBM i: VM Settings for SAP WebAS Java (IBM J9 JVM)

[Former Member]

Hi Effan,

I am back with another question. I am seeing the database as 'DB2/400 ASCII' in the service marketplace. Is this database version supports Unicode?

Thanks

Kalyan

[Former Member]

Hi Kalyan,

tja, what shall I say ?

SAP is not really able to write UNICODE or "nothing" there ...

This means: ASCII or Unicode ....

Regards

Volker Gueldenpfennig, consolut international ag

http://www.consolut.net - http://www.4soi.de - http://www.easymarketplace.de

[Former Member]

To your question: yes, but the concept is:

EBCDIC: single code page for 46C or earlier versions

ASCII: multi processing code pages for 46C or newer

Unicode: one code page for all for 620 or newer

[Former Member]

Effan,

Does this mean that we should see 'DB2/400 UNICODE' in service.sap.com/swdc? I am seeing only 'DB2/400 ASCII' there. But it has the Kernels for UC. Is this a standard practice? or should I call SAP for unicode specific software?

We are downloading the software from marketplace and don't have DVD's. I am sure that SAP installation is not installing the DB2 on iseries. But, is there a way that I can confirm that we are doing UNICODE system installations?

Thank you,

Kalyan

[Former Member]

Volker,

Thanks for the reply. Is there a DB2/400 UNICODE version on iseries which I shold check with the iseries team?

This is the first time I am installing SAP on iseries. I am thorough with the Redbooks and SAP installation guides. But this is something is not clearly mentioned anywhere.

Thanks

Kalyan

[Former Member]

Hi Kalyan,

as Fan described as well: The SAP idea "behind" that is pretty weared ;-((

=> there is ONLY "DB2 ASCII" as name in SMP and this means "ASCII or Unicode" (in opposite to EBCDIC)

Sorry for the confusion, but this was not my idea ...

Regards

Volker Gueldenpfennig, consolut international ag

http://www.consolut.net - http://www.4soi.de - http://www.easymarketplace.de

[Former Member]

Volker,

Thanks for the clarification. I am started downloading the software.

Kalyan