On startup, ew2liss reads the configuration file named on the command line. Commands in this file set all the parameters used for configuring the Earthworm LISS server module. (LISS is the Live Internet Seismic Server.) In the control file, lines may begin with a valid ew2liss command (listed below) or with one of 2 special characters:
Command names must be typed in the control file exactly as shown in this document (upper/lower case matters!). Blank lines are also permitted in the control file.# marks the line as a comment (example: # This is a comment).
@ allows control files to be nested; one control file can be accessed from another with the command "@" followed by a string representing the path name of the next control file (example: @model.d).
Below are the commands recognized by ew2liss, grouped by the function they influence. Most of the commands are required; they may be specified in any order in the control file.
Earthworm system setup:
MyModuleId required
InRing required
HeartBeatInterval required
GetWavesFrom required
Debug optional
LISS server parameters:
LISSaddr required
LISSport required
SeqFile required
SocketTimeout optional
Data input parameters:
MaxSCNs required
ServeSCN required
In the following section, all configuration file commands are listed in alphabetical order. Listed along with the command (bold-type) are its arguments (in red), the name of the subroutine that processes the command, and the function within the module that the command influences. A detailed description of the command and is also given. Default values and example commands are listed after each command description.
command arg1 processed by in function
Debug ReadConfig Earthworm setup
Turns on debug logging for ew2liss. Currently does nothing at all.Default: no debug logging Example: Debug
GetWavesFrom inst mod_id Earthworm setup
Controls the TRACE_BUF messages input to ew2liss. Ew2liss will only process TRACE_BUF messages that come from module mod_id at installation inst. inst and mod_id are character strings (valid strings are listed in earthworm.d) which are related to single-byte numbers that uniquely identify each installation and module. Only 1 "GetWavesFrom" command may be issued; wildcards (INST_WILDCARD and MOD_WILDCARD) will force ew2liss to process all TRACE_BUF messages, regardless of their place of origin.Default: none Example: GetWavesFrom INST_MENLO MOD_WILDCARD
HeartBeatInterval nsec ReadConfig Earthworm Setup
Defines the number of seconds, nsec between TYPE_HEARTBEAT messages issued by ew2liss.Default: none Example: HeartBeatInterval 30
InRing ring ReadConfig Earthworm setup
Tells ew2liss which shared memory region to use for input. ring is a character string (valid strings are listed in earthworm.d) that relates (in earthworm.d) to a unique number for the key to the shared memory region.Default: none Example: InRing WAVE_RING
LISSaddr address ReadConfig LISS parameters
Specify the address of the nework interface on the earthworm computer that you want to use for serving LISS. This can be either on IP address (four period-separated numbers) or the domain name of the server.Default: none Example: LISSaddr 123.45.6.78
LISSport port ReadConfig LISS parameters
Specifies the IP port number for the LISS. Normally this is 4000. But if you run more than one instance of ew2liss on one computer, they cannot use the same LISSaddr and LISSport.Default: none Example: LISSport 4000
LogFile switch ReadConfig Earthworm Setup
Sets the on-off switch for writing a log file to disk. If switch is 0, no log file will be written. If switch is non-zero, ew2liss will write daily log file(s) called nnnnnxx.log_yyyymmdd where nnnnn is the name of the configuration file (with the suffix `.d' removed), xx is ew2liss's module id (set with MyModuleId command) and yyyymmdd is the current UTC date (ex: 19960123) on the system clock. The file(s) will be written in the EW_LOG directory (environment variable).Default: none Example: LogFile 1
MaxSCNs n ReadConfig Data Selection
Specifies the number of ServeSCN commands to be found in this configuration file.Default: none Example: MaxSCNs 3
MyModuleId mod_id ReadConfig Earthworm setup
Sets the module id for labeling all outgoing trigger, heartbeat, and error messages. mod_id is a character string (valid strings are listed in earthworm.d) that relates to a unique single-byte number.Default: none Example: MyModuleId MOD_L2E_ANMO
SeqFile filename ReadConfig LISS Parameter
Specifies the filename for the sequence number file, kept in the EW_PARAMS directory (environment variable). If this file does not exist, ew2liss will try to create it. From then on, it records the last sequence number used on a miniSEED record. These numbers are six digit decimal numbers.Default: none Example: SeqFile seq.lsn
ServeSCN station component net location ReadConfig Data selection
Specifies one stream of data to be read from the transport ring and served as LISS data. The station, component, and network are used to set the earthworm SCN of this data stream. These three parameters must be given explicitly (no wildcards). LISS channels may also identified by a location code. If you want, you can inlude a two-digit location code here; otherwise leave this blank. You must give one ServeSCN command for each SCN that you want to serve.Default: none Example: ServeSCN SEA BHZ UW
SocketTimeout seconds ReadConfig LISS parameters
Defines the number of seconds to wait for response from the LISS. This time interval must not be large than the HeartBeatInterval. Unlike in certain other Earthworm modules, you cannot turn off the timeout by using a value of -1.Default: same as HeartBeatInterval Example: SocketTimeout 20
#
# Configuration File for ew2liss
#
MyModId MOD_EW2LISS
InRing WAVE_RING # Transport ring to read trace data from
HeartBeatInterval 30 # Heartbeat interval, in seconds,
LogFile 1 # 1 -> Keep log, 0 -> no log file
#
# Specify logo of the messages to grab from the InRing.
# TYPE_TRACEBUF is assumed, therefore only module ID and
# installation ID need to be specified
#
GetWavesFrom INST_WILDCARD MOD_WILDCARD # TYPE_TRACEBUF (assumed)
LISSaddr 123.45.6.78 # IP address of the LISS (server)
# If you have DNS configured, you may also
# give the domain name of the LISS.
LISSport 4000 # Port number for LISS; often this is 4000
SocketTimeout 30 # Socket timeout in seconds; not more than
# HeartBeatInterval
SeqFile seq.lsn # Name of sequence number file.
MaxSCNs 3 # Number of SCNs to accept; must be at least
# the number of ServeSCN commands.
# List each sta/comp/net that you want to serve with a
# "ServeSCN" command. Location code (LC) is a 2-digit numerical code that
# you may use to further identify the data stream.
# Location code may be omitted (left blank); all other entries must be
# given explicitly (no wildcards).
# site comp net LC
# ---- ---- --- --
ServeSCN SEA BHZ UW 00
ServeSCN SEA BHN UW 00
ServeSCN SEA BHE UW 00