Managing Serviceguard Extension for SAP Version B.05.10, December 2012

Table 27 General File System Layout for liveCache (Option 3) (continued)
Mount PointPackageStorage Type
/export/sapdb/programssapnfsshared
/export/sapdb/datasapnfsautofs shared
/var/spool/sql/inisapnfsautofs shared
* only valid for liveCache versions lower than 7.6.
Option 4: Hot Standby liveCache
Two liveCache instances are running in a hot standby liveCache cluster during normal operation.
No instance failover takes place. This allows to keep instance-specific data local to each node.
The cluster design follows the principle to share as little as possible.
The following directories are relevant:
Table 28 File System Layout for Hot Standby liveCache
Volume ManagerMount PointPackageAccess Point
any/sapdb/<LCSID>nonelocal
any/sapdb/programsnonelocal
any/sapdb/datanonelocal
any/var/spool/sql/ininonelocal
must be LVM-based/sapdb/<LCSID>/datannonelocal; with XP BCVs
between the nodes
must be CVM-based/sapdb/<LCSID>/lognSG-CFS-DG-<LCSID>logn
SG-CFS-MP-<LCSID>logn
shared disk and CFS
MaxDB Storage Considerations
SGeSAP supports current MaxDB, liveCache and older MaxDB releases. The considerations made
below will apply similarly to MaxDB, liveCache and MaxDB clusters unless otherwise indicated.
MaxDB distinguishes an instance dependant path /sapdb/<DBSID> and two instance independent
paths, called IndepData and IndepPrograms. By default all three point to a directory below
/sapdb.
The paths can be configured in a configuration file called
/var/spool/sql/ini/SAP_DBTech.ini. Depending on the version of the MaxDB database
this file contains different sections and settings.
A sample SAP_DBTech.ini for a host with a MaxDB 7.4 (LC1) and an APO 3.1 using a MaxDB
7.3 database instance (AP1):
[Globals]
IndepData=/sapdb/data
IndepPrograms=/sapdb/programs
[Installations]
/sapdb/LC1/db=7.4.2.3,/sapdb/LC1/db
/sapdb/AP1/db=7.3.0.15,/sapdb/AP1/db
[Databases]
.MAXDBLC=/sapdb/LC1/db
LC1=/sapdb/LC1/db
_MAXDBAP=/sapdb/AP1/db
AP1=/sapdb/AP1/db
[Runtime]
/sapdb/programs/runtime/7240=7.2.4.0,
MaxDB Storage Considerations 123