Install Additional App Server on Linux for existing ERP 6.0 running on AIX

[Former Member]

Hi Experts,

We currently have an ERP 6.0 EHP6 7.31 SP5 system running on AIX 6.1 & DB2 10.1 & SAP Kernel 7.20_EXT. At this moment we have CI Abap & DB running on AIX & 4 additional App serves (DIA, BTC, SPO) also on AIX.

We want to install/move additional app server (Running DIA, BTC, SPO) on Linux.

At the moment all kernel executables are under /sapmnt/<SID>/exe.

Can someone please confirm:

1) whether it is supported to move only the SAP Abap dialog instance to run on Linux but the DB2 database and SAP Central instance remains on AIX. We have read notes 1067221 & 531069 which not though clearly but state that it is possible.

2) Beside what will happen to /sapmnt/<SID>/exe global mount which has AIX kernel & not directory like rs6000_64 & then kernel beneath. Because when we install the new app server on Linux it will ask for global /sapmnt mount point. Will it automatically move AIX kernel to rs6000_64 & create another directory linuxx86_64.

Regards
Ajay Sehgal

[Reagan · Accepted solution]

Yes it is possible to have dialog instances on Linux - heterogeneous setup.

Read this SAP note

680617 - INST: Appl. Server in Heterogeneous SAP System Environment

The /sapmnt/SID/exe directory / file system should be separate for AIX and Linux

Regards

RB

[divyanshu_srivastava3]

Hi Ajay,

whether it is supported to move only the SAP Abap dialog instance to run on Linux but the DB2 database and SAP Central instance remains on AIX. We have read notes 1067221 & 531069 which not though clearly but state that it is possible.

Yes, it is possible and there are many threads on this too.

Here are few examples, perhaps requested by customers so SAP has created these notes.

Refer: 1148109 - Heterogeneous Inst.(Appl. Server Windows, DB Unix)

1067221 - Composite SAP Note for heterogeneous installation

2) Beside what will happen to /sapmnt/<SID>/exe global mount which has AIX kernel & not directory like rs6000_64 & then kernel beneath. Because when we install the new app server on Linux it will ask for global /sapmnt mount point. Will it automatically move AIX kernel to rs6000_64 & create another directory linuxx86_64.

You cannot run AIX kernel on Linux, so adjustment are necessary for current and future updates.

Have a look at below note to understand it's possibilities.

Refer:

680617 - INST: Appl. Server in Heterogeneous SAP System Environment

Divyanshu

[divyanshu_srivastava3]

This is just a quick reply.

**** I will update this tomorrow.

Point here is Kernel should not be copied and sapcpe should not run incorrectly. Even is the kernel is copied, application server will not start because of failed loading. So this copy should be fixed.

What should be mounted ?

/usr/sap/SID

/usr/sap/trans/

/sapmnt/

sapexe should point to Linux Kernel

So, how can be avoid this ?

After the installation on Linux, 1st thing that we have to do is update in profile - DIR_CT_RUN=$(DIR_INSTALL)\exe\uc\<platform>(UNICODE)

Convert the instance profile, default profile, and the start profile into AIX format(if needed)

Now, we will go back to our primary application server, create new version directory - uc\<platform> and put the same kernel level that be have for AIX in this Linux folder.

Run SAPCPE with this new profile copied on SYS profile.

Divyanshu