Logging I/O Activity
TheRSCS component of VM/370 contains a facility for logging all I/O act1v1ty on a particular teleprocessing link. this logging feature can be utilized if a problem arises where tracing I/O activity on a line
becomes a necessity.
TheRSCS operator can turn the feature on and off by issuing the RSCS CMD command with the LOG or NOLOG operand. The format of the CMD command, when used to control logging, is as follows: CMD L
linkidLOG NOLOG linkid {LOG } NOLOG , I I is the location identifier for the link on which logging is to
be performed.
is the keyword that starts the logging ofI/C activity.
is the keyword that stops the logging ofI/O activity.
TheloggIng output Is a printer spool file containing a one-line
record for eachI/O transaction on the teleprocessing line. A
transaction is defined as any read or write of a teleprocessing buffer.When logging is turned off, the output is spooled to a printer. The distribution code on the printer output is the linkid that
was specified in the CMD command.
The output log record is printed in hexadecimal notation unless
otherwise noted.340 IBM VMj370 System Programmer's Guide
The
becomes a necessity.
The
linkid
be performed.
is the keyword that starts the logging of
is the keyword that stops the logging of
The
record for each
transaction is defined as any read or write of a teleprocessing buffer.
was specified in the CMD command.
The output log record is printed in hexadecimal notation unless
otherwise noted.