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Posted to reviews@iotdb.apache.org by GitBox <gi...@apache.org> on 2020/08/10 14:57:31 UTC
[GitHub] [incubator-iotdb] qiaojialin commented on a change in pull request #1601: add a data migration example
qiaojialin commented on a change in pull request #1601:
URL: https://github.com/apache/incubator-iotdb/pull/1601#discussion_r467963582
##########
File path: example/session/src/main/java/org/apache/iotdb/DataMigrationExample.java
##########
@@ -0,0 +1,183 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iotdb;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import org.apache.iotdb.rpc.IoTDBConnectionException;
+import org.apache.iotdb.rpc.StatementExecutionException;
+import org.apache.iotdb.session.SessionDataSet.DataIterator;
+import org.apache.iotdb.session.pool.SessionDataSetWrapper;
+import org.apache.iotdb.session.pool.SessionPool;
+import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
+import org.apache.iotdb.tsfile.read.common.Path;
+import org.apache.iotdb.tsfile.utils.Binary;
+import org.apache.iotdb.tsfile.write.record.Tablet;
+import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;
+
+
+/**
+ * Migrate all data belongs to a path from one IoTDB to another IoTDB
+ * Each thread migrate one series, the concurrent thread can be configured by concurrency
+ *
+ * This example is
+ * migrating all timeseries from a local IoTDB with 6667 port to a local IoTDB with 6668 port
+ */
+public class DataMigrationExample {
+
+ // used to read data from the source IoTDB
+ private static SessionPool readerPool;
+ // used to write data into the destination IoTDB
+ private static SessionPool writerPool;
+ // concurrent thread of loading timeseries data
+ private static int concurrency = 5;
+
+ public static void main(String[] args)
+ throws IoTDBConnectionException, StatementExecutionException, ExecutionException, InterruptedException {
+
+ ExecutorService executorService = Executors.newFixedThreadPool(2 * concurrency + 1);
+
+ String path = "root";
+
+ if (args.length != 0) {
+ path = args[0];
+ }
+
+ readerPool = new SessionPool("127.0.0.1", 6667, "root", "root", concurrency);
+ writerPool = new SessionPool("127.0.0.1", 6668, "root", "root", concurrency);
+
+ SessionDataSetWrapper schemaDataSet = readerPool.executeQueryStatement("count timeseries " + path);
+ DataIterator schemaIter = schemaDataSet.iterator();
+ int total;
+ if (schemaIter.next()) {
+ total = schemaIter.getInt(1);
+ System.out.println("Total timeseries: " + total);
+ } else {
+ System.out.println("Can not get timeseries schema");
+ System.exit(1);
+ }
+ readerPool.closeResultSet(schemaDataSet);
+
+
+ schemaDataSet = readerPool
+ .executeQueryStatement("show timeseries " + path);
+ schemaIter = schemaDataSet.iterator();
+
+ List<Future> futureList = new ArrayList<>();
+ int count = 0;
+ while (schemaIter.next()) {
+ count ++;
+ Path currentPath = new Path(schemaIter.getString("timeseries"));
+ Future future = executorService.submit(new LoadThread(count, currentPath, TSDataType.valueOf(schemaIter.getString("dataType"))));
+ futureList.add(future);
+ }
+ readerPool.closeResultSet(schemaDataSet);
+
+ for (Future future: futureList) {
Review comment:
fixed
##########
File path: example/session/src/main/java/org/apache/iotdb/DataMigrationExample.java
##########
@@ -0,0 +1,183 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iotdb;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import org.apache.iotdb.rpc.IoTDBConnectionException;
+import org.apache.iotdb.rpc.StatementExecutionException;
+import org.apache.iotdb.session.SessionDataSet.DataIterator;
+import org.apache.iotdb.session.pool.SessionDataSetWrapper;
+import org.apache.iotdb.session.pool.SessionPool;
+import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
+import org.apache.iotdb.tsfile.read.common.Path;
+import org.apache.iotdb.tsfile.utils.Binary;
+import org.apache.iotdb.tsfile.write.record.Tablet;
+import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;
+
+
+/**
+ * Migrate all data belongs to a path from one IoTDB to another IoTDB
+ * Each thread migrate one series, the concurrent thread can be configured by concurrency
+ *
+ * This example is
+ * migrating all timeseries from a local IoTDB with 6667 port to a local IoTDB with 6668 port
+ */
+public class DataMigrationExample {
+
+ // used to read data from the source IoTDB
+ private static SessionPool readerPool;
+ // used to write data into the destination IoTDB
+ private static SessionPool writerPool;
+ // concurrent thread of loading timeseries data
+ private static int concurrency = 5;
+
+ public static void main(String[] args)
+ throws IoTDBConnectionException, StatementExecutionException, ExecutionException, InterruptedException {
+
+ ExecutorService executorService = Executors.newFixedThreadPool(2 * concurrency + 1);
+
+ String path = "root";
+
+ if (args.length != 0) {
+ path = args[0];
+ }
+
+ readerPool = new SessionPool("127.0.0.1", 6667, "root", "root", concurrency);
+ writerPool = new SessionPool("127.0.0.1", 6668, "root", "root", concurrency);
+
+ SessionDataSetWrapper schemaDataSet = readerPool.executeQueryStatement("count timeseries " + path);
+ DataIterator schemaIter = schemaDataSet.iterator();
+ int total;
+ if (schemaIter.next()) {
+ total = schemaIter.getInt(1);
+ System.out.println("Total timeseries: " + total);
+ } else {
+ System.out.println("Can not get timeseries schema");
+ System.exit(1);
+ }
+ readerPool.closeResultSet(schemaDataSet);
+
+
+ schemaDataSet = readerPool
+ .executeQueryStatement("show timeseries " + path);
+ schemaIter = schemaDataSet.iterator();
+
+ List<Future> futureList = new ArrayList<>();
+ int count = 0;
+ while (schemaIter.next()) {
+ count ++;
Review comment:
fixed
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