(window.webpackJsonp=window.webpackJsonp||[]).push([[827],{1394:function(t,e,a){"use strict";a.r(e);var i=a(71),l=Object(i.a)({},(function(){var t=this,e=t.$createElement,a=t._self._c||e;return a("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[a("h1",{attrs:{id:"writing-data-on-hdfs"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#writing-data-on-hdfs"}},[t._v("#")]),t._v(" Writing Data on HDFS")]),t._v(" "),a("h2",{attrs:{id:"shared-storage-architecture"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#shared-storage-architecture"}},[t._v("#")]),t._v(" Shared Storage Architecture")]),t._v(" "),a("p",[t._v("Currently, TSFiles(including both TSFile and related data files) are supported to be stored in local file system and hadoop distributed file system(HDFS). 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"),a("td",{staticStyle:{"text-align":"left"}},[t._v("String")])]),t._v(" "),a("tr",[a("td",{staticStyle:{"text-align":"center"}},[t._v("Default")]),t._v(" "),a("td",{staticStyle:{"text-align":"left"}},[t._v("your principal")])]),t._v(" "),a("tr",[a("td",{staticStyle:{"text-align":"center"}},[t._v("Effective")]),t._v(" "),a("td",{staticStyle:{"text-align":"left"}},[t._v("After restart system")])])])]),t._v(" "),a("p",[t._v("Start server, and Tsfile will be stored on HDFS.")]),t._v(" "),a("p",[t._v("If you'd like to reset storage file system to local, just edit configuration "),a("code",[t._v("tsfile_storage_fs")]),t._v(" to "),a("code",[t._v("LOCAL")]),t._v(". In this situation, if you have already had some data files on HDFS, you should either download them to local and move them to your config data file folder ("),a("code",[t._v("../server/target/iotdb-server-0.9.1/data/data")]),t._v(" by default), or restart your process and import data to IoTDB.")]),t._v(" "),a("h3",{attrs:{id:"frequent-questions"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#frequent-questions"}},[t._v("#")]),t._v(" Frequent questions")]),t._v(" "),a("ol",[a("li",[t._v("What Hadoop version does it support?")])]),t._v(" "),a("p",[t._v("A: Both Hadoop 2.x and Hadoop 3.x can be supported.")]),t._v(" "),a("ol",{attrs:{start:"2"}},[a("li",[t._v("When starting the server or trying to create timeseries, I encounter the error below:")])]),t._v(" "),a("div",{staticClass:"language- line-numbers-mode"},[a("pre",{pre:!0,attrs:{class:"language-text"}},[a("code",[t._v("ERROR org.apache.iotdb.tsfile.fileSystem.fsFactory.HDFSFactory:62 - Failed to get Hadoop file system. Please check your dependency of Hadoop module.\n")])]),t._v(" "),a("div",{staticClass:"line-numbers-wrapper"},[a("span",{staticClass:"line-number"},[t._v("1")]),a("br")])]),a("p",[t._v("A: It indicates that you forget to put Hadoop module dependency in IoTDB server. You can solve it by:")]),t._v(" "),a("ul",[a("li",[t._v("Build Hadoop module: "),a("code",[t._v("mvn clean package -pl hadoop -am -Dmaven.test.skip=true")])]),t._v(" "),a("li",[t._v("Copy the target jar of Hadoop module "),a("code",[t._v("hadoop-tsfile-0.9.1-jar-with-dependencies.jar")]),t._v(" into server target lib folder "),a("code",[t._v(".../server/target/iotdb-server-0.9.1/lib")]),t._v(".")])])])}),[],!1,null,null,null);e.default=l.exports}}]);