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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.test.microbench;
  
  
  import java.io.IOException;
  import java.util.concurrent.*;
  
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  import org.openjdk.jmh.annotations.*;
  
  @BenchmarkMode(Mode.Throughput)
  @OutputTimeUnit(TimeUnit.MILLISECONDS)
  @Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
  @Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS)
  @Fork(value = 1)
  @Threads(1)
  @State(Scope.Benchmark)
  public class ReadWriteBench extends CQLTester
  {
      static String keyspace;
      String table;
      String writeStatement;
      String readStatement;
      long numRows = 0;
      ColumnFamilyStore cfs;
  
      @Setup(Level.Trial)
      public void setup() throws Throwable
      {
          CQLTester.setUpClass();
          keyspace = createKeyspace("CREATE KEYSPACE %s with replication = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 } and durable_writes = false");
          table = createTable(keyspace, "CREATE TABLE %s ( userid bigint, picid bigint, commentid bigint, PRIMARY KEY(userid, picid))");
          execute("use "+keyspace+";");
          writeStatement = "INSERT INTO "+table+"(userid,picid,commentid)VALUES(?,?,?)";
          readStatement = "SELECT * from "+table+" limit 100";
  
          cfs = Keyspace.open(keyspace).getColumnFamilyStore(table);
          cfs.disableAutoCompaction();
  
          //Warm up
          System.err.println("Writing 50k");
          for (long i = 0; i < 5000; i++)
              execute(writeStatement, i, i, i );
      }
  
      @TearDown(Level.Trial)
      public void teardown() throws IOException, ExecutionException, InterruptedException
      {
          CQLTester.cleanup();
      }
  
      @Benchmark
      public Object write() throws Throwable
      {
          numRows++;
          return execute(writeStatement, numRows, numRows, numRows );
      }
  
  
      @Benchmark
      public Object read() throws Throwable
      {
          return execute(readStatement);
      }
  }
  