RDF System Management Manual for J-series and H-series RVUs (RDF Update 13)

MAT and associated auxiliary audit trails, when the lockstep transaction begins. Thus, when the
lockstep audit data is committed on the backup system, all audit data generated in the MAT prior
to that data is also guaranteed to be committed on the backup system.
Lockstep and Auxiliary Audit Trails
From T1226AAC, lockstep gateway supports transactions involving RDF protected auxiliary audit
trail volumes. T1226AAC must be used only with T0346H11ACS and later versions of RDF/IMPX
product.
The Lockstep Gateway Process
The RDF lockstep gateway process is managed by the Subsystem Control Facility (SCF). To start a
lockstep gateway process, you must create and execute an SCF script file. The recommended script
settings are:
ASSUME PROCESS $ZZKRN
ADD #LSGO, &
NAME $ZLSGW, &
CPU FIRSTOF (1,2,3), &
PROGRAM volume.subvolume.LSGO, &
STARTMODE APPLICATION, &
STARTUPMSG "ENABLE <extractor-process-name>", &
AUTORESTART 10
START #LSGO
For detailed information about these attributes, see the information about configuring and managing
generic processes in the SCF Reference Manual for H-Series RVUs. For some attributes, however,
restrictions apply when the attributes are used with a lockstep gateway process.
NAME
This attribute must be $ZLSGW. If you specify anything else, the lockstep gateway stops and you
cannot perform lockstep operations. This means you can only have a single lockstep gateway
process running on your primary system.
PROGRAM
This attribute specifies where the RDF gateway object code resides. Typically, that location is the
same volume and subvolume where all of the other RDF software resides. The object name is LSGO,
and that you must fully qualify the name. For example, you might specify the PROGRAM attribute
as $SYSTEM.RDF.LSGO.
STARTUPMSG
This attribute must include the process name of your RDF extractor (for example, STARTUPMSG
"ENABLE $MEXT"). The startup message must also include either ENABLE or DISABLE as the first
parameter. Failure to include either of these parameters will cause the gateway to stop. The gateway
can only communicate with one extractor. If you have multiple RDF subsystems using the same
node as their primary system, only one of them can execute lockstep operations.
AUTORESTART
This attribute specifies the number of times SCF attempts to restart the gateway process if it should
stop unexpectedly. You should set this attribute to 10.
Disabling Lockstep
To disable lockstep processing:
1. Change ENABLE to DISABLE in the STARTUPMSG attribute script.
2. Manually delete the RDF lockstep gateway process from SCF.
Lockstep and Auxiliary Audit Trails 303