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

Table 12 File System Layout for SAPDB Clusters (continued)
Device Minor
Number
VG NameVG TypePotential Owning
Packages
Access
Point
Mount Point
nonelocal/etc/opt/sdb
environment
specific
nonelocal/var/lib/sdb
*Only valid for versions lower than 7.6.
**Only valid for versions 7.8 or higher.
NOTE: Using tar or cpio is not a safe method to copy or move directories to shared volumes. In
certain circumstances file or ownership permissions may not be correctly transported, especially
files having the s-bit set: /sapdb/<SID>/db/pgm/lserver and
/sapdb/<SID>/db/pgm/dbmsrv. These files are important for the vserver process ownership
and they have an impact on starting the SAPDB via <SID>adm. These files should retain the same
ownership and permission settings after moving them to a shared volume.
Database and SAP instances depend on the availability of /sapdb/programs. To minimize
dependencies between otherwise unrelated systems, using a dedicated SAPNFS package is strongly
recommended—especially when the cluster has additional SAP application servers installed, more
than one SAPDB is installed, or the database is configured in a separate DB package. Keeping
local copies is possible, though not recommended because there are no administration tools that
keep track of the consistency between the local copies of these files on all the systems.
DB2 Storage Considerations
SGeSAP supports failover of DB2 databases as part of SGeSAP NFS cluster option 1. Cluster File
Systems cannot be used for the DB2 part of SGeSAP clusters.
Consolidation of SAP instances is possible in SGeSAP DB2 environments.
Table 13 File System Layout for DB2 Clusters
Device
Minor
Number
VG NameVG TypePotential Owning
Packages
Access PointMount Point
database
specific
db<DBSID>
dbci<DBSID>
shared disk/db2/db2<dbsid>
/db2/db2<dbsid>/db2_software
jdb<DBSID>/db2/<DBSID>
jdbjci<DBSID>/db2/<DBSID>/log_dir
/db2/<DBSID>/sapdata1
…
/db2/<DBSID>/sapdata<n>
/db2/<DBSID>/saptemp1
/db2/<DBSID>/db2dump
/db2/<DBSDID>/db2<dbsid>
ASE Storage Considerations
SGeSAP supports failover of Sybase ASE databases as part of SGeSAP NFS cluster option 1.
Cluster File Systems cannot be used for the ASE part of SGeSAP clusters. It is possible to consolidate
SAP instances in SGeSAP ASE environments.
42 Planning the Storage Layout