LOGAPPEND (JANUS DEFINE parameter)
Open log dataset in APPEND mode
LOGAPPEND is a parameter on JANUS DEFINE, which defines and sets characteristics of a Janus port.
This parameter indicates that the Janus Web Server log dataset for the port is to be opened in APPEND mode.
This parameter is only available under MVS. Its chief advantage over using DISP=MOD on a DD card (or APPEND on the ALLOCATE command) is that MVS places an exclusive enqueue on a dataset opened with DISP=MOD. This means that a DISP=MOD dataset cannot be opened while the port is started for log analysis or downloading to a system where log analysis can be run. A log dataset with a DISP=SHR DD and specified as LOGAPPEND can be examined while the port is started. While there is no harm in specifying both DISP=MOD and LOGAPPEND, it defeats the purpose of the LOGAPPEND parameter.
Valid only for WEBSERV ports.