/// <summary>Given an output filename, write a bunch of random records to it.</summary> /// <exception cref="System.IO.IOException"/> /// <exception cref="System.Exception"/> protected override void Map(WritableComparable key, Writable value, Mapper.Context context) { int itemCount = 0; while (numBytesToWrite > 0) { int keyLength = minKeySize + (keySizeRange != 0 ? random.Next(keySizeRange) : 0); randomKey.SetSize(keyLength); RandomizeBytes(randomKey.GetBytes(), 0, randomKey.GetLength()); int valueLength = minValueSize + (valueSizeRange != 0 ? random.Next(valueSizeRange ) : 0); randomValue.SetSize(valueLength); RandomizeBytes(randomValue.GetBytes(), 0, randomValue.GetLength()); context.Write(randomKey, randomValue); numBytesToWrite -= keyLength + valueLength; context.GetCounter(LargeSorter.Counters.BytesWritten).Increment(keyLength + valueLength ); context.GetCounter(LargeSorter.Counters.RecordsWritten).Increment(1); if (++itemCount % 200 == 0) { context.SetStatus("wrote record " + itemCount + ". " + numBytesToWrite + " bytes left." ); } } context.SetStatus("done with " + itemCount + " records."); }
/// <summary>Given an output filename, write a bunch of random records to it.</summary> /// <exception cref="System.IO.IOException"/> /// <exception cref="System.Exception"/> protected override void Map(Text key, Text value, Mapper.Context context) { int itemCount = 0; while (numBytesToWrite > 0) { // Generate the key/value int noWordsKey = minWordsInKey + (wordsInKeyRange != 0 ? random.Next(wordsInKeyRange ) : 0); int noWordsValue = minWordsInValue + (wordsInValueRange != 0 ? random.Next(wordsInValueRange ) : 0); Text keyWords = GenerateSentence(noWordsKey); Text valueWords = GenerateSentence(noWordsValue); // Write the sentence context.Write(keyWords, valueWords); numBytesToWrite -= (keyWords.GetLength() + valueWords.GetLength()); // Update counters, progress etc. context.GetCounter(RandomTextWriter.Counters.BytesWritten).Increment(keyWords.GetLength () + valueWords.GetLength()); context.GetCounter(RandomTextWriter.Counters.RecordsWritten).Increment(1); if (++itemCount % 200 == 0) { context.SetStatus("wrote record " + itemCount + ". " + numBytesToWrite + " bytes left." ); } } context.SetStatus("done with " + itemCount + " records."); }
/// <exception cref="System.IO.IOException"/> /// <exception cref="System.Exception"/> protected override void Map(Org.Apache.Hadoop.IO.Text key, Org.Apache.Hadoop.IO.Text val, Mapper.Context context) { long acc = 0L; long recs = 0; int keydiff = keymax - keymin; int valdiff = valmax - valmin; for (long i = 0L; acc < bytesToWrite; ++i) { int recacc = 0; recacc += GenerateSentence(key, keymin + (0 == keydiff ? 0 : r.Next(keydiff))); recacc += GenerateSentence(val, valmin + (0 == valdiff ? 0 : r.Next(valdiff))); context.Write(key, val); ++recs; acc += recacc; context.GetCounter(GenericMRLoadGenerator.Counters.BytesWritten).Increment(recacc ); context.GetCounter(GenericMRLoadGenerator.Counters.RecordsWritten).Increment(1); context.SetStatus(acc + "/" + (bytesToWrite - acc) + " bytes"); } context.SetStatus("Wrote " + recs + " records"); }