Managing Serviceguard Extension for SAP on Linux (IA64 Integrity and x86_64), April 2009

su - <sid>adm
mkdir /usr/sap/<SID>/ASCS<INSTNR>
Replicated Enqueue Conversion: RE020
A volume group needs to be created for the ASCS instance.
The physical device(s) should be created as LUN(s) on shared storage. Storage connectivity is required from
all nodes of the cluster that should run the ASCS. For the volume group, one logical volume should get
configured. For the required size, refer to the capacity consumption of
/usr/sap/<SID>/DVEBMGS<INSTNR>. This should provide a conservative upper limit that leaves
reasonable headroom.
Mount the new logical volume to the mountpoint created in RE010.
Replicated Enqueue Conversion: RE030
Create instance subdirectories in the mounted logical volume.
They will be switched between the cluster nodes later.
su - <sid>adm
cd /usr/sap/<SID>/ASCS<INSTNR>
mkdir data log sec work
Replicated Enqueue Conversion: RE040
If the used SAP kernel has a release smaller than 6.40:
Download the executables for the Standalone Enqueue server from the SAP Service Marketplace and copy
them to /sapmnt/<SID>/exe.
There should be at least three files that are added/replaced: enserver, enrepserver and ensmon.
Make sure these files are part of the sapcpe mechanism for local executable creation (see Chapter 2).
This step will create a version mix for the executables. The Standalone Enqueue executables get taken from
the 6.40 kernel. Special caution has to be taken to not replace them with older releases later on. This might
happen by accident when kernel patches get applied.
Replicated Enqueue Conversion: RE050
Create instance profile and startup profile for the ASCS Instance.
These profiles get created as <sid>adm in the NFS-shared /sapmnt/<SID>/profile directory.
Here is an example template for the instance profile <SID>_ASCS<INSTNR>_<CIRELOC>:
#----------------------------------
# general settings
#----------------------------------
SAPSYSTEMNAME=<SID>
INSTANCE_NAME=ASCS<INSTNR>
SAPSYSTEM=<NSTNR>
SAPLOCALHOST=<CIRELOC>
SAPLOCALHOSTFULL=<CIRELOC>.<domain>
#----------------------------------
# enqueueserver settings
#----------------------------------
enque/server/internal_replication = true
enque/server/replication = true
enque/server/threadcount = 1
enque/enrep/keepalive_count = 0
enque/process_location = local
enque/table_size = 4096
ipc/shm_psize_34 = 0
#----------------------------------
# messageserver settings
#----------------------------------
rdisp/mshost=<CIRELOC>
#----------------------------------
58 Step-by-Step Cluster Conversion