Cache cache = cacheManager.getCache();
Directory dir = DirectoryBuilder.newDirectoryInstance(cache, cache, cache, INDEXNAME).chunkSize(BUFFER_SIZE).create();
String fileName = "SomeText.txt";
IndexOutput io = dir.createOutput(fileName, IOContext.DEFAULT);
RepeatableLongByteSequence bytesGenerator = new RepeatableLongByteSequence();
//It writes repeatable text
final int REPEATABLE_BUFFER_SIZE = 1501;
for (int i = 0; i < REPEATABLE_BUFFER_SIZE; i++) {
io.writeByte(bytesGenerator.nextByte());