| /* |
| * 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.cassandra.tools.nodetool; |
| |
| import java.io.PrintStream; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.stream.Collectors; |
| import javax.management.openmbean.CompositeData; |
| import javax.management.openmbean.OpenDataException; |
| |
| import com.google.common.collect.Lists; |
| |
| import io.airlift.airline.Arguments; |
| import io.airlift.airline.Command; |
| import io.airlift.airline.Option; |
| import org.apache.cassandra.metrics.Sampler.SamplerType; |
| import org.apache.cassandra.metrics.SamplingManager; |
| import org.apache.cassandra.tools.NodeProbe; |
| import org.apache.cassandra.tools.NodeTool.NodeToolCmd; |
| import org.apache.cassandra.utils.Pair; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkState; |
| import static org.apache.commons.lang3.StringUtils.join; |
| |
| @Command(name = "profileload", description = "Low footprint profiling of activity for a period of time") |
| public class ProfileLoad extends NodeToolCmd |
| { |
| @Arguments(usage = "<keyspace> <cfname> <duration>", description = "The keyspace, column family name, and duration in milliseconds (Default: 10000)") |
| private List<String> args = new ArrayList<>(); |
| |
| @Option(name = "-s", description = "Capacity of the sampler, higher for more accuracy (Default: 256)") |
| private int capacity = 256; |
| |
| @Option(name = "-k", description = "Number of the top samples to list (Default: 10)") |
| private int topCount = 10; |
| |
| @Option(name = "-a", description = "Comma separated list of samplers to use (Default: all)") |
| private String samplers = join(SamplerType.values(), ','); |
| |
| @Option(name = {"-i", "--interval"}, description = "Schedule a new job that samples every interval milliseconds (Default: disabled) in the background") |
| private int intervalMillis = -1; // -1 for disabled. |
| |
| @Option(name = {"-t", "--stop"}, description = "Stop the scheduled sampling job identified by <keyspace> and <cfname>. Jobs are stopped until the last schedules complete.") |
| private boolean shouldStop = false; |
| |
| @Option(name = {"-l", "--list"}, description = "List the scheduled sampling jobs") |
| private boolean shouldList = false; |
| |
| @Override |
| public void execute(NodeProbe probe) |
| { |
| checkArgument(args.size() == 3 || args.size() == 2 || args.size() == 1 || args.size() == 0, |
| "Invalid arguments, either [keyspace table/* duration] or [keyspace table/*] or [duration] or no args.\n" + |
| "Optionally, use * to represent all tables under the keyspace."); |
| checkArgument(topCount > 0, "TopK count (-k) option must have positive value"); |
| checkArgument(topCount < capacity, |
| "TopK count (-k) option must be smaller then the summary capacity (-s)"); |
| checkArgument(capacity <= 1024, "Capacity (-s) cannot exceed 1024."); |
| String keyspace = null; |
| String table = null; |
| int durationMillis = 10000; |
| /* There are 3 possible outcomes after processing the args. |
| * - keyspace == null && table == null. We need to sample all tables |
| * - keyspace == KEYSPACE && table == *. We need to sample all tables under the specified KEYSPACE |
| * - keyspace = KEYSPACE && table == TABLE. Sample the specific KEYSPACE.table combination |
| */ |
| if (args.size() == 3) |
| { |
| keyspace = args.get(0); |
| table = args.get(1); |
| durationMillis = Integer.parseInt(args.get(2)); |
| } |
| else if (args.size() == 2) |
| { |
| keyspace = args.get(0); |
| table = args.get(1); |
| } |
| else if (args.size() == 1) |
| { |
| durationMillis = Integer.parseInt(args.get(0)); |
| } |
| keyspace = nullifyWildcard(keyspace); |
| table = nullifyWildcard(table); |
| |
| checkArgument(durationMillis > 0, "Duration: %s must be positive", durationMillis); |
| |
| checkArgument(!hasInterval() || intervalMillis >= durationMillis, |
| "Invalid scheduled sampling interval. Expecting interval >= duration, but interval: %s ms; duration: %s ms", |
| intervalMillis, durationMillis); |
| // generate the list of samplers |
| List<String> targets = Lists.newArrayList(); |
| Set<String> available = Arrays.stream(SamplerType.values()).map(Enum::toString).collect(Collectors.toSet()); |
| for (String s : samplers.split(",")) |
| { |
| String sampler = s.trim().toUpperCase(); |
| checkArgument(available.contains(sampler), String.format("'%s' sampler is not available from: %s", s, Arrays.toString(SamplerType.values()))); |
| targets.add(sampler); |
| } |
| |
| PrintStream out = probe.output().out; |
| |
| Map<String, List<CompositeData>> results; |
| try |
| { |
| // handle scheduled samplings, i.e. start or stop |
| if (hasInterval() || shouldStop) |
| { |
| // keyspace and table are nullable |
| boolean opSuccess = probe.handleScheduledSampling(keyspace, table, capacity, topCount, durationMillis, intervalMillis, targets, shouldStop); |
| if (!opSuccess) |
| { |
| if (shouldStop) |
| out.printf("Unable to stop the non-existent scheduled sampling for keyspace: %s, table: %s%n", keyspace, table); |
| else |
| out.printf("Unable to schedule sampling for keyspace: %s, table: %s due to existing samplings. " + |
| "Stop the existing sampling jobs first.%n", keyspace, table); |
| } |
| return; |
| } |
| else if (shouldList) |
| { |
| List<Pair<String, String>> sampleTasks = new ArrayList<>(); |
| int maxKsLength = "KEYSPACE".length(); |
| int maxTblLength = "TABLE".length(); |
| for (String fullTableName : probe.getSampleTasks()) |
| { |
| String[] parts = fullTableName.split("\\."); |
| checkState(parts.length == 2, "Unable to parse the full table name: %s", fullTableName); |
| sampleTasks.add(Pair.create(parts[0], parts[1])); |
| maxKsLength = Math.max(maxKsLength, parts[0].length()); |
| } |
| // print the header line and put enough space between KEYSPACE AND TABLE. |
| String lineFormat = "%" + maxKsLength + "s %" + maxTblLength + "s%n"; |
| out.printf(lineFormat, "KEYSPACE", "TABLE"); |
| sampleTasks.forEach(pair -> out.printf(lineFormat, pair.left, pair.right)); |
| return; |
| } |
| else |
| { |
| // blocking sample all the tables or all the tables under a keyspace |
| if (keyspace == null || table == null) |
| results = probe.getPartitionSample(keyspace, capacity, durationMillis, topCount, targets); |
| else // blocking sample the specific table |
| results = probe.getPartitionSample(keyspace, table, capacity, durationMillis, topCount, targets); |
| } |
| } |
| catch (OpenDataException e) |
| { |
| throw new RuntimeException(e); |
| } |
| |
| AtomicBoolean first = new AtomicBoolean(true); |
| SamplingManager.ResultBuilder rb = new SamplingManager.ResultBuilder(first, results, targets); |
| out.println(SamplingManager.formatResult(rb)); |
| } |
| |
| private boolean hasInterval() |
| { |
| return intervalMillis != -1; |
| } |
| |
| private String nullifyWildcard(String input) |
| { |
| return input != null && input.equals("*") ? null : input; |
| } |
| } |