/// <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");
}