Managing HP Serviceguard Extension for SAP for Linux, December 2013

Table 21 Groupfile file groups

RemarkGroups

Primary group for all SAP SID users and DB userssapsys

SAP installer group, secondary for SAP SID and DB userssapinst

MaxDB file ownersdba

Oracle database operators (limited privileges)oper

Oracle database administratorsdba

IBM DB2 authorization groupsdb2<dbsid>admdb2<dbsid>mntdb2<dbsid>ctldb2<dbsid>mon

NOTE: For more information of the terms local, shared exclusive, and shared nfs file

systems used in this section, see chapter 4 “SAP Netweaver cluster storage layout planning” (page

37).

Along with synchronizing user and group information, the HOME directories of the administrators

must be created on the local file system (unless this directory does not reside on a local disk

as in the case for some DB users) on each secondary node.

This duplication of the user’s HOME to secondary nodes is done by running the tar command

on the HOME directory on the primary and unpacking that archive on the secondary.

Use the tar –p flag to preserve permissions, user, and group ids.

Some SAP login scripts in the <sid> adm and database admin HOME directories contain versions

for execution on the local node. For example, they contain hostnames in the filename. These login

scripts also have versions for bash (.sh), and csh (.csh). Some files that are often found

are .sapenv, .dbenv, .lcenv, .sapsrc, and .dbsrc (it is not necessary that all of them

exist).

As these files are copied from the primary’s home directories, they will have the primary node

name in the filename. The primary must be replaced with the secondary node name.

For example:

.dbenv.csh on sgxsap51 was duplication from sgxsap50.

On the secondary node, sgsap51 execute:

mv .dbenv_sgxsap50.csh .dbenv_sgxsap51.csh

In the older installations, startsap and stopsap scripts exist with the primary node in the

filename. These must be replaced accordingly.

In the case of the Sybase database administrator, the home directory resides on a shared

exclusive disk. There is no duplication required as the file system is only mounted on the

node running the package. However, the node specific login scripts exist and therefore must be

created for all the secondary nodes. Run the copy command

cp .dbenv_sgxsap50.csh .dbenv_sgxsap51.csh on the primary (instead of the mv

command).

Verification:

command must not produce errors. If the home directory does not reside on a local file system

but resides on shared file system instead, start the package containing the corresponding volume

group on that node first.

HANA: Provide local secure store file

Within the local copies of the <sid>adm home directory on all nodes, the node-specific secure

store needs to be copied from the file created on only one server during instance installation.

70 Clustering SAP Netweaver using SGeSAP packages