Examples of com.yahoo.ycsb.generator.ScrambledZipfianGenerator

com.yahoo.ycsb.generator.ScrambledZipfianGenerator
A generator of a zipfian distribution. It produces a sequence of items, such that some items are more popular than others, according to a zipfian distribution. When you construct an instance of this class, you specify the number of items in the set to draw from, either by specifying an itemcount (so that the sequence is of items from 0 to itemcount-1) or by specifying a min and a max (so that the sequence is of items from min to max inclusive). After you construct the instance, you can change the number of items by calling nextInt(itemcount) or nextLong(itemcount). Unlike @ZipfianGenerator, this class scatters the "popular" items across the itemspace. Use this, instead of @ZipfianGenerator, if you don't want the head of the distribution (the popular items) clustered together.

      //just ignore it and pick another key. this way, the size of the keyspace doesn't change from the perspective of the scrambled zipfian generator
      
      int opcount=Integer.parseInt(p.getProperty(Client.OPERATION_COUNT_PROPERTY));
      int expectednewkeys=(int)(((double)opcount)*insertproportion*2.0); //2 is fudge factor
      
      keychooser=new ScrambledZipfianGenerator(recordcount+expectednewkeys);
    }
    else if (requestdistrib.compareTo("latest")==0)
    {
      keychooser=new SkewedLatestGenerator(transactioninsertkeysequence);
    }

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      int expectednewkeys = (int) (((double) opcount) * Config.getConfig().insert_proportion * 2.0); // 2
                                            // is
                                            // fudge
                                            // factor


      keychooser = new ScrambledZipfianGenerator(recordcount
          + expectednewkeys);
    } else if (Config.getConfig().request_distribution.compareTo("latest") == 0) {
      keychooser = new SkewedLatestGenerator(transactioninsertkeysequence);
    }  else if (Config.getConfig().request_distribution.compareTo("churn") == 0){
      keychooser = new ChurnGenerator(Config.getConfig().working_set, Config.getConfig().churn_delta, recordcount);

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      // keyspace doesn't change from the perspective of the scrambled
      // zipfian generator


      int opcount = Config.getConfig().operation_count;
      int expectednewkeys = (int) (((double) opcount) * Config.getConfig().memset_proportion * 2.0); // 2 is fudge factor
      keychooser = new ScrambledZipfianGenerator(recordcount + expectednewkeys);
    } else if (Config.getConfig().request_distribution.compareTo("latest") == 0) {
      keychooser = new SkewedLatestGenerator(transactioninsertkeysequence);
    } else if (Config.getConfig().request_distribution.compareTo("churn") == 0){
      keychooser = new ChurnGenerator(Config.getConfig().working_set, Config.getConfig().churn_delta, recordcount);
    } else {

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