Operations Basics / Version 2406.1
Table Of Contents
Each command-line tool has its own start file with the ending
".jpif", which is executed on startup. The name of this
file corresponds to the name used for starting the application with the cm/
command (for example cm runlevel
uses runlevel.jpif
). You'll
find these files in the <COREM_HOME>/bin
directory.
The JPIF files for applications determine which Java class should be executed on starting the application. Further settings for the operation of the application can also be stored in this file. This file can be used to modify the Java Virtual Machine (JVM) where the application runs, while parameters can be passed to the JVM.
The following CoreMedia relevant modifications can be configured for the Java Virtual
Machine in the JAVA_VM_ARGS
section of the JPIF file:
The memory usage within the Java Virtual Machine can be configured using the explicit
parameters -Xms<size>
and -Xmx<size>
or the relative parameters
-XX:MinRAMPercentage=<size>
and -XX:MaxRAMPercentage=<size>
.
-Xms
and -XX:MinRAMPercentage
specify the initial object memory size.
-Xmx
and -XX:MaxRAMPercentage
the maximum object memory size.
The memory requirement for the applications is not preconfigured and it should be sized
according to the standard hardware recommendations. To size an application, you should use the
default JVM command-line augmentation facade, the JAVA_TOOL_OPTIONS
environment
variable, either set globally or per process.
The ORB can be configured to use a fixed CORBA port using the parameter
com.coremedia.corba.server.port
as described in
Section 4.4, “Communication between the System Applications”.
Furthermore, the target of the log outputs of the Java process (see
Section 4.7, “Logging”) can be configured with the parameter
OUTPUT_REDIRECT
.
Three JPIF files cannot be invoked directly with the cm
command. They are
executed internally:
pre-config.jpif
for installation depending settings. In this file, the parameterVERBOSE
can be set tofalse
to reduce JVM outputs. On a Unix system, the JVM to use is set in this file.module.jpif
for general environment settings for the Java programs in the CoreMedia system.post-config.jpif
for special CoreMedia JVM settings.
In general, these files need not be changed.