Summary of system logger services

System logger provides the following set of services:

IXGINVNT: Define and maintain log stream and coupling facility structure information in the LOGR policy dynamically. See 'IXGINVNT: Managing the LOGR Policy' in z/OS MVS Programming: Assembler Services Guide.
You can also use the IXCMIAPU utility to specify log stream and structure definitions in the LOGR policy. IXCMIAPU also enables you to request a report of current log stream definitions.
IXGCONN: Connect and disconnect an application to and from a log stream. See the topic on IXGCONN: Connecting to and disconnecting from a log stream.
IXGWRITE: Write user-defined log data to a log stream. See 'IXGWRITE: Writing to a Log Stream' in z/OS MVS Programming: Assembler Services Guide.
IXGBRWSE: Browse (read) data from a log stream. See 'IXGBRWSE Requests' in z/OS MVS Programming: Assembler Services Guide.
IXGDELET: Delete data from a log stream. See the topic on IXGDELET: Deleting log blocks from a log stream.
IXGIMPRT: Import (write) log blocks to a log stream with a log block identifier and timestamp. See 'IXGIMPRT: Import Log Blocks' in z/OS MVS Programming: Assembler Services Guide.
IXGQUERY: Retrieve information from a log stream. See 'IXGQUERY: Get Information About a Log Stream' in z/OS MVS Programming: Assembler Services Guide.
IXGOFFLD: Initiate an offload of log data from the coupling facility structure for coupling facility log streams and from local storage buffers for DASD-only log streams to DASD log data sets. See 'IXGOFFLD: Initiate Offload to DASD Log Data Sets' in z/OS MVS Programming: Assembler Services Guide.
IXGUPDAT: Modify the UTC time stamp maintained in the control information for a log stream. See 'IXGUPDAT: Modify Log Stream Control Information' in z/OS MVS Programming: Assembler Services Guide.

The following services contain parameters for both authorized and unauthorized programs:

IXGCONN
IXGBRWSE
IXGWRITE
IXGDELET

All other system logger services and their parameters can be used by any program. See z/OS MVS Programming: Assembler Services Guide and z/OS MVS Programming: Assembler Services Reference IAR-XCT for the general description of the Logger services that can be used by any program. Only the guidance for authorized programs using Logger services is contained in this information.