Relocation of HA services

[arun_lobo]

Hello Guys

we have the following architecture

Database and ASCS instances running on AIX sysems using Oracle HA cluster services. Application servers running on Linux hosts

Example

AIX

up-ser-db1: DB, ENQ replication

up-ser-db2: ASCS

The HA is maintained by oracle using CRS

alobo1@up-ser-db2 > crs_stat -t

Name Type Target State Host

-

---

ora....db1.gsd application ONLINE ONLINE up-ser-db1

ora....db1.ons application ONLINE ONLINE up-ser-db1

ora....db1.vip application ONLINE ONLINE up-ser-db1

ora....db2.gsd application ONLINE ONLINE up-ser-db2

ora....db2.ons application ONLINE ONLINE up-ser-db2

ora....db2.vip application ONLINE ONLINE up-ser-db2

rgASCS_RP1 application ONLINE ONLINE up-ser-db1

rgAS...P1.head application ONLINE ONLINE up-ser-db1

rgAS...nstance application ONLINE ONLINE up-ser-db1

rgASCS_RP1.vip application ONLINE ONLINE up-ser-db1

rgDB_RP1 application ONLINE ONLINE up-ser-db2

rgDB_RP1.db application ONLINE ONLINE up-ser-db2

rgDB_RP1.gw application ONLINE ONLINE up-ser-db2

rgDB_RP1.head application ONLINE ONLINE up-ser-db2

rgDB...istener application ONLINE ONLINE up-ser-db2

rgDB_RP1.vip application ONLINE ONLINE up-ser-db2

rgENREP_RP1 application ONLINE ONLINE up-ser-db2

rgEN...P1.head application ONLINE ONLINE up-ser-db2

rgEN...nstance application ONLINE ONLINE up-ser-db2

rgEN...RP1.vip application ONLINE ONLINE up-ser-db2

LInux

up-ser-c01: app servers

up-ser-d01

up-ser-d03

up-ser-d04

We now intend to rework the architecture where we run only the DB on the AIX hosts and move the ASCS and ENQ to the linux tier.

Example up-ser-c01 will run ASCS up-ser-d01 will run ENQ replication

Has anyone done this before and is it as simple as changing the instance profile on each host ?

[former_member188883 · Accepted solution]

Hi Arun,

The scenario mentioned by you will be very very difficult. I can say not possible.

Since DB will be on AIX and ASCS will be on Linux.

Both will have different kernel releases and levels. During failover it won't be possible to handle this.

Hence not recommened for HA setup.

In case you want to have distributed environment, you can go ahead with that.

Hope this helps.

Regards,

Deepak Kori

[arun_lobo]

Hello

this is what we intend to do, we want to remove the HA cluster from oracle and run ascs, gateway, scs on the application servers.

We will not use HA from SAP but use VMWARE for this purpose. How do we go about uninstalling the AIX bases services ? is it just commenting off from profile and remove from cluster ?

Also since the app servers already have the sap software installed what is the best way to install the ascs?scs? gateway G10 example can we directly edit profile or use sapinst ?

Can we just install enq replication on the another dialog ?

thanks in advance

Arun

[sunny_pahuja2]

Hi,

If you don't want to use HA, then you don't need ASCS, gateway etc. Architecture of systems on HA and systems as distributed installation are different.

So, In order to migrate your system from HA to distributed system, you should use system copy procedure and this is the recommended way.

Thanks

Sunny

[sunny_pahuja2]

Hi,

You need to install system either as HA or distributed system.

If you plan to keep DB on AIX and SAP application on linux then you should install it as distributed system. Check below link:

http://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/b09d53ac-8b0f-2b10-6798-ecfd55894839#secti...

Thanks

Sunny