SIAM Configuration Guide

Configuration Files

SIAM is configured primarily through environment variables and Java Properties files. The following table describes the main SIAM configuration files' location and purpose:

Configuration File Description -
SIAM_HOME/properties/siamPort.cfg Configure SIAM ports and behavior (via Java Properties) -
SIAM_HOME/properties/siam.log4j Configure SIAM logging output -
/etc/siam/siamEnv Platform-specific SIAM environment (via Java properties) -
SIAM_HOME/properties/policy Java security policy definition -

Environment variables

The configuration of main SIAM environment variables is discussed in the Installation Guide.


The file siamPort.cfg (SIAM_HOME/properties/siamPort.cfg) is a Java properties file for SIAM node configuration. The Java API documentation describes the syntax rules of properties files, but essentially they contain name=value pairs that define configuration parameters.

siamPort.cfg is conventionally organized in sections: port configuration, node configuration, platform-specific settings. However, no specific ordering is required. If duplicate property names exist, the last one (towards the end of the file) is used.

The sections below provide details about the various properties.

The examples directory contains a version of siamPort.cfg

Instrument Service Ports

Parameter Description Example
powerPort0 NULL
portName0 louver
serviceJar0 ElmoLouver-1762.jar
maxPorts 21

Node Configuration Settings

Parameter Description Example
nodeID 1726
nodeType primary
jarLocation -
logLocation -

Network Configuration Settings

Platform-Specific (MMC, FOCE, etc.)


Parameter Description Example
platformPower 0x310 0x320
platformAnalog 0x300 0x330
platformAnalogTypes d s
analogPort1 0 8-14,24-30
analogName1 PMonitor


Parameter Description Example
networkNumberBase 35
networkNumber Add to networkNumberBase to obtain 3rd octet of network address 0
ethernetAddressBase first two octets of network address 134.89.
pppAddressBase -
pppHostName -
pppHostName enabled|disabled
DHCP enabled|disabled
lrrDevice globalstar
srrDevice freewave
lrrConnection portal
srrConnection auxConsole
SleepManager.enabled true to enable, false means you'll never go to sleep TRUE|FALSE
SleepManager.sleepString command to invoke to put us to sleep nice --20 /root/
SleepManager.pollSeconds How often we poll to see if we can go to sleep (sec) 2
SleepManager.wakeupSeconds How many seconds we wake up early, to allow things to stabilize before sampling. 3
SleepManager.sleepDelay How long to delay before going to sleep, to allow logs to sync 3
SleepManager.minSleepSeconds Minimum time we'll go to sleep. If less than this, we'll just stay awake. 5
SleepManager.minAwakeSeconds Minimum to stay awake. Avoids race that puts node to sleep when trying to wake it up 60
CommsManager.enabled TRUE|FALSE
CommsManager.auxEnabled TRUE|FALSE
NodeService.leaseInterval (connection duration sec) 60000 primary nodes 10000 for the subnodes -
NodeService.auxLeaseInterval (connection duration sec) 60000 primary nodes 10000 for the subnodes 60000
NodeService.leaseRenewalInterval (connection period) 60000 for deployment 120000 for testing on ethernet 60000
NodeService.auxLeaseRenewalInterval (connection period) 60000 for deployment 120000 for testing on ethernet 60000
CommsManager.parentLinkOn (system call to exec on connection) globalstarOn 300
CommsManager.parentLinkOff (system call to exec on connection) commsOff
CommsManager.parentLinkStatus (system call to check status of network interfaces) linkStatus ppp
CommsManager.auxLinkOn globalstarOn 300
CommsManager.auxLinkOff commsOff
CommsManager.protocolWaitTime,auxProtocolWaitTime (time to wait when establishing connection) 15000 primary nodes with Globalstar wireless 5000 for other nodes 0 for testing on ethernet 5000
CommsManager.processWaitTime, CommsManager.auxProcessWaitTime (time to wait when disconnection) 240000 for primary nodes with Globalstar wireless 60000 for primary nodes 30000 for the subnodes 60000
CommsManager.reassert Set true to reassert parent link when it breaks or if there are leases pending when the link terminates. TRUE|FALSE
CommsManager.maxReassertTries if CommsManager.reassert=true, retry this many times to reassert the link 1


The siam.log4j file is a configuration file for the log4j open source logging package. It may be used to determine what logging information appears in the SIAM application logs.

At runtime, the environment variable LOG4J_THRESHOLD sets the default logging output level, and is set by the script that runs the SIAM application. It may be overridden in siam.log4j. The configuratio file may also be used to format the debug output. A sample file appears below:

# For the general syntax of property based configuration files see the
# documenation of org.apache.log4j.PropertyConfigurator. See also

#log4j.rootCategory=WARN, stdout, rolling, lf5
log4j.rootCategory=INFO, rolling

# Set logging level for specific packages 

# Recommend leaving the following loggers in DEBUG to aid in 
# diagnosis of bug SIAM-58 (EventManager loses track of DevicePacketAggregator
# listener)

# CONSOLE APPENDER (stdout) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#log4j.appender.stdout.layout.ConversionPattern=%d{ISO8601} [%t] %-5p %c %x - %m%n
log4j.appender.stdout.layout.ConversionPattern=%r %-5p %x %c{1} [%t]: %m%n

# ROLLING FILE APPENDER (rolling) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#log4j.appender.rolling.layout.ConversionPattern=%d{ISO8601} [%t] %-5p %c %x - %m%n
log4j.appender.rolling.layout.ConversionPattern=%r %-5p %x %c{1} [%t]: %m%n

# LF5 APPENDER (lf5) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SIAM directs stdout and stderr to the siam application logs (SIAM_HOME/logs/nodeName-startDate); log4j also uses this log file for its rolling log appender, so the logs are rotated so they will not grow beyond some maximum size defined in siam.log4j. As can be seen in the example, it is possible to configure the debug level on a class by class basis, or use a common default value for all appenders.


The file siamEnv (found in the distribution as SIAM_HOME/native/arm-linux/top/etc/siam/siamEnv) may be used to configure key environment variables for the SIAM application. These settings may also be set in (or sourced from) .bashrc for user accounts used for SIAM administration. siamEnv also contains convenient aliases for frequently used commands, as well as options for the Java virtual machine used for SIAM.

# .bashrc

# Environment for SIAM applications
# Note that SIAM_HOME *must* be set prior to executing this script.

# Setup Java
. /j9/j9env
export JAVA=j9
export JAVA_OPTIONS="-mca:32 -mco:64 -mx:24576 -mo:1024 -moi:256"

export SIAM_BIN=$SIAM_HOME/bin/arm-linux
export SIAM_CODEBASE=http://`hostname`/codebase/

export PARENT_HOST=surface
export SIAM_CLASSPATH=$JAVA_HOME/lib/jclMax/$JAVA_HOME/lib/prsnlmot.jar:$JAVA_HOME/lib/RXTXcomm.jar:$SIAM_HOME/classes:/mnt/hda/codebase:$SIAM_HOME/jars/javax.jar:$SIAM_HOME/jars/gnu_getopt.jar:$SIAM_HOME/jars/jrendezvous.jar:$SIAM_HOME/jars/log4j-1.2.13.jar:$SIAM_HOME/jars/XModem.jar:$SIAM_HOME/jars/jddac-common.jar:$SIAM_HOME/jars/jddac-probe-j2me.jar:$SIAM_HOME/jars/backport-util-concurrent.jar:$SIAM_HOME/jars/rbnb.jar

# Set to TRUE if you want SIAM node app to start on reboot

export SIAM_LOG4J=$SIAM_HOME/properties/siam.log4j

export PATH=.:$PATH:$SIAM_HOME/utils:$SIAM_BIN:/etc/siam:$HOME/bin

alias gosiam='cd $SIAM_HOME'
alias java=j9
alias ls='ls -F'
alias ll='ls -AlF'
alias dhcp=ifswitch-to-dhcp


export SIAM_EXIT_SCRIPT=/etc/siam/postSIAM

System Files