/// <exception cref="System.IO.IOException"/>
private static void CreateFiles(int length, int numFiles, Random random)
{
TestCombineSequenceFileInputFormat.Range[] ranges = CreateRanges(length, numFiles
, random);
for (int i = 0; i < numFiles; i++)
{
Path file = new Path(workDir, "test_" + i + ".seq");
// create a file with length entries
SequenceFile.Writer writer = SequenceFile.CreateWriter(localFs, conf, file, typeof(
IntWritable), typeof(BytesWritable));
TestCombineSequenceFileInputFormat.Range range = ranges[i];
try
{
for (int j = range.start; j < range.end; j++)
{
IntWritable key = new IntWritable(j);
byte[] data = new byte[random.Next(10)];
random.NextBytes(data);
BytesWritable value = new BytesWritable(data);
writer.Append(key, value);
}
}
finally
{
writer.Close();
}
}
}
private static TestCombineSequenceFileInputFormat.Range[] CreateRanges(int length
, int numFiles, Random random)
{
// generate a number of files with various lengths
TestCombineSequenceFileInputFormat.Range[] ranges = new TestCombineSequenceFileInputFormat.Range
[numFiles];
for (int i = 0; i < numFiles; i++)
{
int start = i == 0 ? 0 : ranges[i - 1].end;
int end = i == numFiles - 1 ? length : (length / numFiles) * (2 * i + 1) / 2 + random
.Next(length / numFiles) + 1;
ranges[i] = new TestCombineSequenceFileInputFormat.Range(start, end);
}
return(ranges);
}