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110 changes: 110 additions & 0 deletions
110
test/src/main/java/org/apache/accumulo/test/ScanServerMaxLatencyIT.java
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| /* | ||
| * 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 | ||
| * | ||
| * https://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.accumulo.test; | ||
|
|
||
| import java.security.SecureRandom; | ||
| import java.util.Map; | ||
| import java.util.concurrent.Callable; | ||
| import java.util.concurrent.ExecutorService; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
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| import org.apache.accumulo.core.client.Accumulo; | ||
| import org.apache.accumulo.core.client.AccumuloClient; | ||
| import org.apache.accumulo.core.client.ScannerBase; | ||
| import org.apache.accumulo.core.client.admin.NewTableConfiguration; | ||
| import org.apache.accumulo.core.conf.Property; | ||
| import org.apache.accumulo.core.data.Mutation; | ||
| import org.apache.accumulo.core.util.Timer; | ||
| import org.apache.accumulo.minicluster.ServerType; | ||
| import org.apache.accumulo.miniclusterImpl.MiniAccumuloConfigImpl; | ||
| import org.apache.accumulo.test.functional.ConfigurableMacBase; | ||
| import org.apache.accumulo.test.util.Wait; | ||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.io.Text; | ||
| import org.junit.jupiter.api.Test; | ||
|
|
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| public class ScanServerMaxLatencyIT extends ConfigurableMacBase { | ||
|
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| protected void configure(MiniAccumuloConfigImpl cfg, Configuration hadoopCoreSite) { | ||
| cfg.setProperty(Property.SSERV_CACHED_TABLET_METADATA_EXPIRATION, "2s"); | ||
| } | ||
|
|
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| @Test | ||
| public void testMaxLatency() throws Exception { | ||
| final String[] tables = this.getUniqueNames(2); | ||
| final String table1 = tables[0]; | ||
| final String table2 = tables[1]; | ||
|
|
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| getCluster().getConfig().setNumScanServers(1); | ||
| getCluster().getClusterControl().startAllServers(ServerType.SCAN_SERVER); | ||
|
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| ExecutorService executor = Executors.newCachedThreadPool(); | ||
| try (var client = Accumulo.newClient().from(getClientProperties()).build()) { | ||
|
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| Wait.waitFor(() -> !client.instanceOperations().getScanServers().isEmpty()); | ||
|
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| var ntc = new NewTableConfiguration(); | ||
| ntc.setProperties(Map.of(Property.TABLE_MINC_COMPACT_MAXAGE.getKey(), "2s")); | ||
| client.tableOperations().create(table1, ntc); | ||
| client.tableOperations().create(table2); | ||
|
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| Timer timer = Timer.startNew(); | ||
|
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| var future1 = executor.submit(createWriterTask(client, table1, timer)); | ||
| var future2 = executor.submit(createWriterTask(client, table2, timer)); | ||
|
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| for (int i = 0; i < 20; i++) { | ||
| Thread.sleep(1000); | ||
| var eb = timer.elapsed(TimeUnit.MILLISECONDS); | ||
| var es = readMaxElapsed(client, table1); | ||
| System.out.println("t1 " + es + " " + (eb - es)); | ||
| System.out.println("t2 " + readMaxElapsed(client, table2)); | ||
| } | ||
| } | ||
|
|
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| } | ||
|
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| private long readMaxElapsed(AccumuloClient client, String table) throws Exception { | ||
| try (var scanner = client.createScanner(table)) { | ||
| scanner.setConsistencyLevel(ScannerBase.ConsistencyLevel.EVENTUAL); | ||
| scanner.fetchColumn(new Text("elapsed"), new Text("nanos")); | ||
| return scanner.stream().mapToLong(e -> Long.parseLong(e.getValue().toString(), 10)).max() | ||
| .orElse(-1); | ||
| } | ||
| } | ||
|
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| private static Callable<Void> createWriterTask(AccumuloClient client, String table, Timer timer) { | ||
| SecureRandom random = new SecureRandom(); | ||
| Callable<Void> writerTask = () -> { | ||
| try (var writer = client.createBatchWriter(table)) { | ||
| while (true) { | ||
| var elapsed = timer.elapsed(TimeUnit.MILLISECONDS); | ||
| Mutation m = new Mutation(Long.toHexString(random.nextLong())); | ||
| m.put("elapsed", "nanos", "" + elapsed); | ||
| writer.addMutation(m); | ||
| writer.flush(); | ||
| Thread.sleep(100); | ||
| } | ||
| } | ||
| }; | ||
| return writerTask; | ||
| } | ||
|
|
||
| } |