6. DATA SOURCES › 6.11 UNIX System Services (USS) Overview › 6.11.3 UNIX System Services (USS) File System Activity

6.11.3 UNIX System Services (USS) File System Activity

UNIX System Services (USS) accounting for USS file I/O
activity is summarized in the SMF type 30 record. Different
data elements contain I/O activity to different files:

o  The following data elements contain I/O activity to
   regular files, including HFS files:

   OEPRFR   - OE/MVS HFS Regular File Reads
   OEPRFW   - OE/MVS HFS Regular File Writes

o  The following data elements contain I/O activity to pipe
   files.  Because there is no physical I/O activity
   associated with pipe, this type of activity is still
   considered as I/O. These fields also contain I/O
   activity to pipe files and UNIX domain sockets.

   OEPHPR   - OE/MVS HFS Pipe Reads
   OEPHPW   - OE/MVS HFS Pipe Writes

o  The following data elements contain I/O activity to
   special files, including I/O activity to terminals.

   OEPMQR   - OE/MVS Message Queue Bytes Received
   OEPMQS   - OE/MVS Message Queue Bytes Sent
   OEPSFR   - OE/MVS HFS Special File Reads
   OEPSFW   - OE/MVS HFS Special File Writes

o  The following data elements contain I/O activity to
   network sockets, including I/O activity to network
   sockets as returned by the TCP/IP physical file system.

   OEPNSR   - OE/MVS Network Socket Reads
   OEPNSW   - OE/MVS Network Socket Writes