Posted by: asfan

This is the overal directory structure in SAP system.
Unix based: use /
Windows based: use <drive>:\

Shared directory:
/sapmnt/<SID>/profile  è  SAP instance profile
/sapmnt/<SID>/global  è SAP central system log
/sapmnt/<SID>/exe  è SAP executable application directory

Main directory:
/usr/sap  è  physical parent directory
/usr/sap/trans  è  transport directory
/usr/sap/<SID>  è  SAP system parent directory
/usr/sap/<SID>/SYS  è  contain common & global SAP system files (i.e. profile, global, and exe directory)
/usr/sap/<SID>/<instance_name>  è  contain SAP instance specific directories (i.e. data, log, and work)
/sapmnt  è  directory structure for sharing common files to all system belonging into the same group
/sapmnt/<SID>  è  link or share folder of directory /usr/sap/<SID>/SYS
/oracle  è  directory of the whole database system
/oracle/stage  è  directory that used for database installation and upgrades
/oracle/<SID>  è  directory of the whole database application and data files

Final directory:
/sapmnt/<SID>/exe  è  contain all SAP runtime program
/sapmnt/<SID>/exe/opt  è  contain optimized program
/sapmnt/<SID>/exe/dbg  è  program can run under symbolic debuggers
/sapmnt/<SID>/exe/run  è  actual runtime program (SAP kernel)
/sapmnt/<SID>/global  è  contain global & common data shared by all instance (i.e. central system logs & batch job logs)
/sapmnt/<SID>/profile  è  contain instance profile (startup, default, instance-spesific)

Temporary directory (normally refreshed when SAP instance is restarted):
/usr/sap/<SID>/<instance_name>/data  è  contain virtual storage data (i.e. user context & roll area)
/usr/sap/<SID>/<instance_name>/log  è  log entries generated by instance
/usr/sap/<SID>/<instance_name>/work  è  holds all error message & trace information for the instance process

Transport directory:
/usr/sap/trans  è  main transport directory
/usr/sap/trans/bin  è  contain TPPARAM file (global transport parameter)
/usr/sap/trans/data  è  contain transport data file
/usr/sap/trans/log  è  transport logs, trace and statistic file
/usr/sap/trans/buffer  è  special buffer with the SID of every system in the transport group (including control information)
/usr/sap/trans/cofiles  è  control file directory
/usr/sap/trans/sapnames  è  contain information of SAP User that performs export and keep tracks of each transport status
/usr/sap/trans/tmp  è  temporary directory
/usr/sap/trans/actlog  è  action log files (managed by SAP system)
/usr/sap/trans/olddata  è  archived transport files
/usr/sap/trans/backup  è  directory of logical backup with R3trans program
/usr/sap/trans/serial  è  contain serialization of tp