content: /*
   * 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.test.microbench.instance;
  
  
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.Param;
  
  public class ReadWidePartitionsBench extends ReadBenchBase
  {
      @Param({"1000", "4"}) // wide and very wide partitions
      int partitions = 4;
  
      @Override
      public Object[] writeArguments(long i)
      {
          return new Object[] { i % partitions, i, i };
      }
  
      Object[] readArguments(long i, long offset)
      {
          return new Object[] { (i + offset) % partitions, i };
      }
  
      @Benchmark
      public Object readRandomInside() throws Throwable
      {
          return performRead("SELECT * from " + table + " where userid=? and picid=?",
                             () -> readArguments(rand.nextInt(count),0));
      }
  
      @Benchmark
      public Object readRandomWOutside() throws Throwable
      {
          return performRead("SELECT * from " + table + " where userid=? and picid=?",
                             () -> readArguments(rand.nextInt(count), rand.nextInt(6) == 1 ? 1 : 0));
      }
  
      @Benchmark
      public Object readFixed() throws Throwable
      {
          return performRead("SELECT * from " + table + " where userid=? and picid=?",
                             () -> readArguments(1234567890123L % count, 0));
      }
  
      @Benchmark
      public Object readOutside() throws Throwable
      {
          return performRead("SELECT * from " + table + " where userid=? and picid=?",
                             () -> readArguments(1234567890123L % count, 1));
      }
  
      @Benchmark
      public Object readGreaterMatch() throws Throwable
      {
          return performRead("SELECT * from "+table+" where userid=? and picid>? limit 1",
                             () -> readArguments(rand.nextInt(count), 0));
      }
  
      @Benchmark
      public Object readReversedMatch() throws Throwable
      {
          return performRead("SELECT * from "+table+" where userid=? and picid<? order by picid desc limit 1",
                             () -> readArguments(rand.nextInt(count), 0));
      }
  
      @Benchmark
      public Object readGreater() throws Throwable
      {
          return performRead("SELECT * from "+table+" where userid=? and picid>? limit 1",
                             () -> readArguments(rand.nextInt(count), 1));
      }
  
      @Benchmark
      public Object readReversed() throws Throwable
      {
          return performRead("SELECT * from "+table+" where userid=? and picid<? order by picid desc limit 1",
                             () -> readArguments(rand.nextInt(count), -1));
      }
  }
  