File Structure for tp 

On all operating systems, tprequires a special file structure for transport data, logs, temporary data, and transport control data. The file structure is operating system-dependent, but SAP has tried to keep these differences as small as possible.

tpneeds a transport directory, which is called /usr/sap/trans under UNIX. You can also use any other directory in the file system, but it must exist on every machine in your network where a SAP instance is running (UNIX: mounted, Windows: share). If this is not the case, you cannot install a transport system that runs automatically.

Under Windows, the default path of the transport directory is \\$(SAPTRANSHOST)\sapmnt\trans.

You can find more information on how to address and rename the transport directory in the section Preparing the File Systems.

The transport directory must have the following subdirectories:

·        bin:

Contains the global transport parameter file

·        data

Contains the transport data

·        log

Contains transport logs, trace files, and statistics

·        buffer

Contains control information on which transports are to be imported into which R/3 Systems and the order of the imports

·        cofiles

Contains information on change requests (different steps of a change request and their exit codes)

·        sapnames

Contains information for SAP users (the status of each change request)

·        tmp

Contains temporary files (logs, semaphores on files)

·        actlog

Contains action logs for all tasks and requests These files are only changed by the SAP system.

·        olddata

Contains “old” files from other directories that are saved here with the clearold command before being deleted by a later execution of this command