assets/js/348.2a6d7ef2.js

(window.webpackJsonp=window.webpackJsonp||[]).push([[348],{746:function(t,e,i){"use strict";i.r(e);var a=i(29),l=Object(a.a)({},(function(){var t=this,e=t._self._c;return e("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[e("h1",{attrs:{id:"configuration-parameters"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#configuration-parameters"}},[t._v("#")]),t._v(" Configuration Parameters")]),t._v(" "),e("p",[t._v("Before starting to use IoTDB, you need to config the configuration files first. For your convenience, we have already set the default config in the files.")]),t._v(" "),e("p",[t._v("In total, we provide users three kinds of configurations module:")]),t._v(" "),e("ul",[e("li",[e("p",[t._v("environment configuration file ("),e("code",[t._v("iotdb-env.bat")]),t._v(", "),e("code",[t._v("iotdb-env.sh")]),t._v("). The default configuration file for the environment configuration item. Users can configure the relevant system configuration items of JAVA-JVM in the file.")])]),t._v(" "),e("li",[e("p",[t._v("system configuration file ("),e("code",[t._v("iotdb-engine.properties")]),t._v(").")]),t._v(" "),e("ul",[e("li",[e("code",[t._v("iotdb-engine.properties")]),t._v(": The default configuration file for the IoTDB engine layer configuration item. Users can configure the IoTDB engine related parameters in the file, such as JDBC service listening port ("),e("code",[t._v("rpc_port")]),t._v("), unsequence data storage directory ("),e("code",[t._v("unsequence_data_dir")]),t._v("), etc. What's more, Users can configure the information about the TsFile, such as the data size written to the disk per time("),e("code",[t._v("group_size_in_byte")]),t._v(").")])])]),t._v(" "),e("li",[e("p",[t._v("log configuration file ("),e("code",[t._v("logback.xml")]),t._v(")")])])]),t._v(" "),e("p",[t._v("The configuration files of the three configuration items are located in the IoTDB installation directory: "),e("code",[t._v("$IOTDB_HOME/conf")]),t._v(" folder.")]),t._v(" "),e("h2",{attrs:{id:"hot-modification-configuration"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#hot-modification-configuration"}},[t._v("#")]),t._v(" Hot Modification Configuration")]),t._v(" "),e("p",[t._v("For the convenience of users, IoTDB server provides users with hot modification function, that is, modifying some configuration parameters in "),e("code",[t._v("iotdb engine. Properties")]),t._v(" during the system operation and applying them to the system immediately.\nIn the parameters described below, these parameters whose way of "),e("code",[t._v("Effective")]),t._v(" is "),e("code",[t._v("trigger")]),t._v(" support hot modification.")]),t._v(" "),e("p",[t._v("Trigger way: The client sends the command "),e("code",[t._v("load configuration")]),t._v(" to the IoTDB server. See Chapter 4 for the usage of the client.")]),t._v(" "),e("h2",{attrs:{id:"iotdb-environment-configuration-file"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#iotdb-environment-configuration-file"}},[t._v("#")]),t._v(" IoTDB Environment Configuration File")]),t._v(" "),e("p",[t._v("The environment configuration file is mainly used to configure the Java environment related parameters when IoTDB Server is running, such as JVM related configuration. This part of the configuration is passed to the JVM when the IoTDB Server starts. Users can view the contents of the environment configuration file by viewing the "),e("code",[t._v("iotdb-env.sh")]),t._v(" (or "),e("code",[t._v("iotdb-env.bat")]),t._v(") file.")]),t._v(" "),e("p",[t._v("The detail of each variables are as follows:")]),t._v(" "),e("ul",[e("li",[t._v("MAX_HEAP_SIZE")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("MAX_HEAP_SIZE")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("The maximum heap memory size that IoTDB can use at startup.")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("String")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("On Linux or MacOS, the default is one quarter of the memory. On Windows, the default value for 32-bit systems is 512M, and the default for 64-bit systems is 2G.")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("After restarting system")])])])]),t._v(" "),e("ul",[e("li",[t._v("HEAP_NEWSIZE")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("HEAP_NEWSIZE")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("The minimum heap memory size that IoTDB can use at startup.")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("String")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("On Linux or MacOS, the default is min{cores * 100M, one quarter of MAX_HEAP_SIZE}. On Windows, the default value for 32-bit systems is 512M, and the default for 64-bit systems is 2G.")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("After restarting system")])])])]),t._v(" "),e("ul",[e("li",[t._v("JMX_LOCAL")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("JMX_LOCAL")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("JMX monitoring mode, configured as yes to allow only local monitoring, no to allow remote monitoring")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v('Enum String: "true", "false"')])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("true")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("After restarting system")])])])]),t._v(" "),e("ul",[e("li",[t._v("JMX_PORT")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("JMX_PORT")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("JMX listening port. Please confirm that the port is not a system reserved port and is not occupied")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Short Int: [0,65535]")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("31999")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("After restarting system")])])])]),t._v(" "),e("ul",[e("li",[t._v("JMX_IP")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("JMX_IP")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("JMX listening address. 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in ${IOTDB_CONF}/conf/jmx.access.")]),t._v(" "),e("h2",{attrs:{id:"iotdb-system-configuration-file"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#iotdb-system-configuration-file"}},[t._v("#")]),t._v(" IoTDB System Configuration File")]),t._v(" "),e("h3",{attrs:{id:"file-layer"}},[e("a",{staticClass:"header-anchor",attrs:{href:"#file-layer"}},[t._v("#")]),t._v(" File Layer")]),t._v(" "),e("ul",[e("li",[t._v("compressor")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("compressor")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Data compression method")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Enum String : “UNCOMPRESSED”, “SNAPPY”")])]),t._v(" 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"),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("1048576")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Trigger")])])])]),t._v(" "),e("ul",[e("li",[t._v("max_degree_of_index_node")])]),t._v(" "),e("table",[e("thead",[e("tr",[e("th",{staticStyle:{"text-align":"center"}},[t._v("Name")]),t._v(" "),e("th",{staticStyle:{"text-align":"left"}},[t._v("max_degree_of_index_node")])])]),t._v(" "),e("tbody",[e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Description")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("The maximum degree of the metadata index tree (that is, the max number of each node's children)")])]),t._v(" "),e("tr",[e("td",{staticStyle:{"text-align":"center"}},[t._v("Type")]),t._v(" "),e("td",{staticStyle:{"text-align":"left"}},[t._v("Int32")])]),t._v(" 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just add a parameter "printgc" when you start the server.')]),t._v(" "),e("div",{staticClass:"language-bash line-numbers-mode"},[e("pre",{pre:!0,attrs:{class:"language-bash"}},[e("code",[e("span",{pre:!0,attrs:{class:"token function"}},[t._v("nohup")]),t._v(" sbin/start-server.sh printgc "),e("span",{pre:!0,attrs:{class:"token operator"}},[t._v(">")]),t._v("/dev/null "),e("span",{pre:!0,attrs:{class:"token operator"}},[e("span",{pre:!0,attrs:{class:"token file-descriptor important"}},[t._v("2")]),t._v(">")]),e("span",{pre:!0,attrs:{class:"token file-descriptor important"}},[t._v("&1")]),t._v(" "),e("span",{pre:!0,attrs:{class:"token operator"}},[t._v("&")]),t._v("\n")])]),t._v(" "),e("div",{staticClass:"line-numbers-wrapper"},[e("span",{staticClass:"line-number"},[t._v("1")]),e("br")])]),e("p",[t._v("Or")]),t._v(" "),e("div",{staticClass:"language-bash line-numbers-mode"},[e("pre",{pre:!0,attrs:{class:"language-bash"}},[e("code",[t._v("sbin"),e("span",{pre:!0,attrs:{class:"token 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