@Test
public void testParallelLeveledCompaction() throws Exception {
String ksname = "Keyspace1";
String cfname = "StandardLeveled";
Keyspace keyspace = Keyspace.open(ksname);
ColumnFamilyStore store = keyspace.getColumnFamilyStore(cfname);
store.disableAutoCompaction();
LeveledCompactionStrategy lcs = (LeveledCompactionStrategy) store.getCompactionStrategy();
ByteBuffer value =
ByteBuffer.wrap(new byte[100 * 1024]); // 100 KB value, make it easy to have multiple files
// Enough data to have a level 1 and 2
int rows = 128;
int columns = 10;
// Adds enough data to trigger multiple sstable per level
for (int r = 0; r < rows; r++) {
DecoratedKey key = Util.dk(String.valueOf(r));
RowMutation rm = new RowMutation(ksname, key.key);
for (int c = 0; c < columns; c++) {
rm.add(cfname, ByteBufferUtil.bytes("column" + c), value, 0);
}
rm.apply();
store.forceBlockingFlush();
}
// Execute LCS in parallel
ExecutorService executor =
new ThreadPoolExecutor(
4, 4, Long.MAX_VALUE, TimeUnit.SECONDS, new LinkedBlockingDeque<Runnable>());
List<Runnable> tasks = new ArrayList<Runnable>();
while (true) {
while (true) {
final AbstractCompactionTask t = lcs.getMaximalTask(Integer.MIN_VALUE);
if (t == null) break;
tasks.add(
new Runnable() {
public void run() {
t.execute(null);
}
});
}
if (tasks.isEmpty()) break;
List<Future<?>> futures = new ArrayList<Future<?>>(tasks.size());
for (Runnable r : tasks) futures.add(executor.submit(r));
FBUtilities.waitOnFutures(futures);
tasks.clear();
}
// Assert all SSTables are lined up correctly.
LeveledManifest manifest = lcs.manifest;
int levels = manifest.getLevelCount();
for (int level = 0; level < levels; level++) {
List<SSTableReader> sstables = manifest.getLevel(level);
// score check
assert (double) SSTable.getTotalBytes(sstables) / manifest.maxBytesForLevel(level) < 1.00;
// overlap check for levels greater than 0
if (level > 0) {
for (SSTableReader sstable : sstables) {
Set<SSTableReader> overlaps = LeveledManifest.overlapping(sstable, sstables);
assert overlaps.size() == 1 && overlaps.contains(sstable);
}
}
}
for (SSTableReader sstable : store.getSSTables()) {
assert sstable.getSSTableLevel() == sstable.getSSTableLevel();
}
}
