uCosminexus Stream Data Platform - Application Framework Setup and Operation Guide

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8.6.1 Details of the system configuration property file (system_config.properties)

Organization of this subsection
(1) Format
(2) File name
(3) File storage location
(4) Description
(5) Specifiable parameters

(1) Format

Specify each parameter in the following format:

parameter-name=value

(2) File name

system_config.properties

(3) File storage location

This file must be stored in the following directory:

working-directory\conf\

(4) Description

This file specifies the port number used by the SDP server and details of the API trace information and tuple logs that are to be collected. You must create this file for each working directory.

(5) Specifiable parameters

The table below lists and describes the parameters that can be specified and their default values. For details about the parameters, see 8.6.2 Details of the parameters in the system configuration property file (system_config.properties).

Table 8-4 Specifiable parameters and their default values (system_config.properties)

No. Parameter name Description Default value Permitted value range
1 engine.initialQueueSize Specifies the initial number of elements used in the stream queue. 1024 Integer from 1 to 1048576
2 engine.maxQueueSize Specifies the maximum number of elements used in the stream queue. 4096 Integer from 1 to 1048576
3 engine.watchQueueSize.threshold Specifies a threshold value (%) for monitoring the number of elements used in the stream queue. None Integer from 1 to 99
4 logger.console.abnormal.enabled Specifies whether the SDP server start processing is to be continued in the event of a failure during log file initialization:
  • true: Outputs a message to the console and then starts the SDP server.
  • false: Shuts down the SDP server.
 false true
or
false
5 logger.console.enabled Specifies whether messages issued by the SDP server are to be output to the console:
  • true: Outputs messages to both log file and console.
  • false: Does not output messages to the console.
 false true
or
false
6 mon.process_exp_time Specifies (in milliseconds) the processing time for determining a timeout. 30000 Integer from 1 to 2147483647
7 query.decimalMaxPrecision Specifies the maximum precision for an arithmetic operation when the result of a query is the DECIMAL type. 38 Integer from 1 to 38
8 query.decimalRoundingMode Specifies the rounding operation to be performed in the event the precision specified in the query.decimalMaxPrecision parameter is exceeded when the result of a query is the DECIMAL type. HALF_UP HALF_UP
or
DOWN
9 querygroup.sleepOnOverStore Specifies the period of time that execution of a query group is to be placed in the sleep mode when the SDP server's checking determines that there is no available space in the output stream queue. 100 1 to 2147483647
10 querygroup.sleepOnOverStoreRetryCount Specifies the number of times the SDP server is to check the output stream queue for available space before it loads to the output stream queue the tuples obtained from query execution. 0 0 to 2147483647
11 rmi.serverPort Specifies a port number for the SDP server. 20400 Integer from 1 to 65535
12 stream.freeInputQueueSizeThreshold Specifies a threshold value (%) for the available size with respect to the maximum number of elements used in the input stream queue. None Integer from 1 to 99
13 stream.freeInputQueueSizeThresholdOutputMessage Specifies whether a warning message is to be output to the SDP server's message log:
  • true: Outputs warning message.
  • false: Does not output warning message.
 false true
or
false
14 stream.maxKeepTupleCount Specifies the maximum number of tuples that can be retained by the timestamp adjustment function. 125828 Integer from 1 to 1048576
15 stream.timestampAccuracy Specifies the time units and time adjustment range for the timestamp adjustment function. None See 8.6.2(15) stream.timestampAccuracy={{sec|msec|usec},time-adjustment-range|unuse}.
16 stream.timestampMode Specifies the timestamp mode used to timestamp tuples:
  • Server: Uses the server mode.
  • DataSource: Uses the data source mode.
 Server Server
or
DataSource
17 stream.timestampPosition Specifies the name of the time-data column in tuples. None See 8.6.2(17) stream.timestampPosition=time-data-column-name.
18 stream.tupleLogMode Specifies whether execution of the sdptplput command is to be enabled:
  • true: sdptplput command is to be executed.
  • false: Execution of sdptplput command is to be disabled.
 false true
or
false
19 tpl.backupFileCount Specifies the maximum number of backup generations to be retained for the tuple log file. 1 Integer from 0 to 10
20 tpl.bufferCount Specifies the number of tuple log buffers. 5 Integer from 3 to 512
21 tpl.bufferSize Specifies the maximum size of a tuple log buffer (in kilobytes). 1024 Integer from 1 to 2048000
22 tpl.fileCount Specifies the maximum number of tuple log files. 3 Integer from 3 to 512
23 tpl.fileSize Specifies the maximum size of a tuple log file (in megabytes). 100 Integer from 1 to 2048
24 tpl.outputLevel Specifies the tuple log output level:
  • 1: Outputs tuple logs for the tuples that are stored in the stream queue.
  • 2: Outputs tuple logs for the tuples that are discarded due to out-of-sequence time.
  • 3: Outputs tuple logs for tuples with levels 1 and 2.
 3 Integer from 1 to 3
25 tpl.outputTrigger Specifies the tuple log file output timing:
  • BUFFER: Outputs tuple logs to a file when the buffer being used to collect the current tuple logs in the target stream becomes full.
  • NONE: Does not output tuple logs to a file or perform buffering of tuple logs.
  • Input stream queue: BUFFER
  • Output stream queue: NONE
 BUFFER
or
NONE
26 tpl.useOverwrite Specifies whether the buffer is to be overwritten in the event of a full tuple log buffer:
  • true: Overwrites the tuple log buffer.
  • false: Does not overwrite the tuple log buffer.
 true true
or
false
27 trc.api.bufferCount Specifies the number of API trace buffers. 3 Integer from 3 to 512
28 trc.api.bufferSize Specifies the maximum size of an API trace buffer (in kilobytes). 1024 Integer from 1 to 2048000
29 trc.api.fileCount Specifies the maximum number of files to which API trace information is to be output. 3 Integer from 3 to 512
30 trc.api.fileSize Specifies the maximum size of an API trace file (in megabytes). 1024 Integer from 1 to 2048
31 trc.api.ioBufferSize Specifies the maximum size of an API trace I/O buffer (in kilobytes). 2048 Integer from 1 to 2048000
32 trc.api.outputTrigger Specifies the timing for output of API trace information to a file:
  • BUFFER: Outputs API trace information to a file when the I/O thread buffer becomes full.
  • NONE: Does not output API trace information to a file or perform buffering of API trace information.
 BUFFER BUFFER
or
NONE
33 trc.api.useOverwrite Specifies whether the API trace buffer is to be overwritten when the buffer becomes full:
  • true: Overwrites the API trace buffer.
  • false: Does not overwrite the API trace buffer.
 true true
or
false

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