| (window.webpackJsonp=window.webpackJsonp||[]).push([[144],{539:function(e,t,a){"use strict";a.r(t);var s=a(29),n=Object(s.a)({},(function(){var e=this,t=e._self._c;return t("ContentSlotsDistributor",{attrs:{"slot-key":e.$parent.slotKey}},[t("h1",{attrs:{id:"mapreduce-tsfile"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#mapreduce-tsfile"}},[e._v("#")]),e._v(" MapReduce TsFile")]),e._v(" "),t("h2",{attrs:{id:"outline"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#outline"}},[e._v("#")]),e._v(" Outline")]),e._v(" "),t("ul",[t("li",[e._v("TsFile-Hadoop-Connector User Guide\n"),t("ul",[t("li",[e._v("About TsFile-Hadoop-Connector")]),e._v(" "),t("li",[e._v("System Requirements")]),e._v(" "),t("li",[e._v("Data Type Correspondence")]),e._v(" "),t("li",[e._v("TSFInputFormat Explanation")]),e._v(" "),t("li",[e._v("Examples\n"),t("ul",[t("li",[e._v("Read Example: calculate the sum")]),e._v(" "),t("li",[e._v("Write Example: write the average into Tsfile")])])])])])]),e._v(" "),t("h1",{attrs:{id:"tsfile-hadoop-connector-user-guide"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#tsfile-hadoop-connector-user-guide"}},[e._v("#")]),e._v(" TsFile-Hadoop-Connector User Guide")]),e._v(" "),t("h2",{attrs:{id:"about-tsfile-hadoop-connector"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#about-tsfile-hadoop-connector"}},[e._v("#")]),e._v(" About TsFile-Hadoop-Connector")]),e._v(" "),t("p",[e._v("TsFile-Hadoop-Connector implements the support of Hadoop for external data sources of Tsfile type. 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Text("device_id"));\n long timestamp = ((LongWritable)value.get(new Text("timestamp"))).get();\n if (timestamp % 100000 == 0) {\n context.write(deltaObjectId, new MapWritable(value));\n }\n }\n }\n\n /**\n * This reducer calculate the average value.\n */\n public static class TSReducer extends Reducer<Text, MapWritable, NullWritable, HDFSTSRecord> {\n\n @Override\n protected void reduce(Text key, Iterable<MapWritable> values,\n Reducer<Text, MapWritable, NullWritable, HDFSTSRecord>.Context context) throws IOException, InterruptedException {\n long sensor1_value_sum = 0;\n long sensor2_value_sum = 0;\n double sensor3_value_sum = 0;\n long num = 0;\n for (MapWritable value : values) {\n num++;\n sensor1_value_sum += ((LongWritable)value.get(new Text("sensor_1"))).get();\n sensor2_value_sum += ((LongWritable)value.get(new Text("sensor_2"))).get();\n sensor3_value_sum += ((DoubleWritable)value.get(new Text("sensor_3"))).get();\n }\n HDFSTSRecord tsRecord = new HDFSTSRecord(1L, 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