File System Planning

SAP File System Planning

The following figure shows the SAP file system planning. Ensure that the capacity of the /sapmnt and /usr/sap file systems is greater than 2.5 GB and 25 GB, respectively. For details, see SAP official document.

DB2 File System Planning

Before the installation, set required file system nodes for the DB2 database. Table 1 shows the file system planning. The total capacity of the /DB2 file must be greater than 100 GB.

For details about the file system size, see section "3.1 Setting Up File Systems for Shared Disk Scenario" in related SAP official document.

**Table 1**
File System	Description
/db2/db2<dbsid>	Contains the home directory of db2<sapsid>
/db2/<DBSID>/log_dir	Contains at least the online database log files
/db2/<DBSID>/db2dump	Contains DB2 diagnostic log files, DB2 dump files, and further service engineer information
/db2/<DBSID>/db2<dbsid>	Contains the local database directory
/db2/<DBSID>/db2<dbsid>	Contains the temporary tablespace(s)
/db2/<DBSID>/sapdata1	SAP data for container type database managed space (DMS) FILE or for use of DB2's automatic storage management

The following table shows an example of the SAP file system.

Mount Point	File System Capacity	File System Type	Shared	Description
/	100 GB	-	No	OS volume
/usr/sap	100 GB	xfs	No	/usr/sap volume
/sapmnt	40 GB	xfs	No	Shared to all nodes in the SAP system
/db2sfs	Auto capacity expansion	SFS	No	Stores the SAP installation package, which is shared to all nodes in the SAP system.
/db2	300 GB	xfs	No	Used to store DB2 file system nodes.
-	20 GB	swap	No	Swap volume