@Test
public void testUncheckedTombstoneSizeTieredCompaction() throws Exception {
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore store = keyspace.getColumnFamilyStore(CF_STANDARD1);
store.clearUnsafe();
store.metadata.gcGraceSeconds(1);
store.metadata.compactionStrategyOptions.put("tombstone_compaction_interval", "1");
store.metadata.compactionStrategyOptions.put("unchecked_tombstone_compaction", "false");
store.reload();
store.setCompactionStrategyClass(SizeTieredCompactionStrategy.class.getName());
// disable compaction while flushing
store.disableAutoCompaction();
// Populate sstable1 with with keys [0..9]
populate(KEYSPACE1, CF_STANDARD1, 0, 9, 3); // ttl=3s
store.forceBlockingFlush();
// Populate sstable2 with with keys [10..19] (keys do not overlap with SSTable1)
long timestamp2 = populate(KEYSPACE1, CF_STANDARD1, 10, 19, 3); // ttl=3s
store.forceBlockingFlush();
assertEquals(2, store.getSSTables().size());
Iterator<SSTableReader> it = store.getSSTables().iterator();
long originalSize1 = it.next().uncompressedLength();
long originalSize2 = it.next().uncompressedLength();
// wait enough to force single compaction
TimeUnit.SECONDS.sleep(5);
// enable compaction, submit background and wait for it to complete
store.enableAutoCompaction();
FBUtilities.waitOnFutures(CompactionManager.instance.submitBackground(store));
while (CompactionManager.instance.getPendingTasks() > 0
|| CompactionManager.instance.getActiveCompactions() > 0) TimeUnit.SECONDS.sleep(1);
// even though both sstables were candidate for tombstone compaction
// it was not executed because they have an overlapping token range
assertEquals(2, store.getSSTables().size());
it = store.getSSTables().iterator();
long newSize1 = it.next().uncompressedLength();
long newSize2 = it.next().uncompressedLength();
assertEquals(
"candidate sstable should not be tombstone-compacted because its key range overlap with other sstable",
originalSize1,
newSize1);
assertEquals(
"candidate sstable should not be tombstone-compacted because its key range overlap with other sstable",
originalSize2,
newSize2);
// now let's enable the magic property
store.metadata.compactionStrategyOptions.put("unchecked_tombstone_compaction", "true");
store.reload();
// submit background task again and wait for it to complete
FBUtilities.waitOnFutures(CompactionManager.instance.submitBackground(store));
while (CompactionManager.instance.getPendingTasks() > 0
|| CompactionManager.instance.getActiveCompactions() > 0) TimeUnit.SECONDS.sleep(1);
// we still have 2 sstables, since they were not compacted against each other
assertEquals(2, store.getSSTables().size());
it = store.getSSTables().iterator();
newSize1 = it.next().uncompressedLength();
newSize2 = it.next().uncompressedLength();
assertTrue(
"should be less than " + originalSize1 + ", but was " + newSize1, newSize1 < originalSize1);
assertTrue(
"should be less than " + originalSize2 + ", but was " + newSize2, newSize2 < originalSize2);
// make sure max timestamp of compacted sstables is recorded properly after compaction.
assertMaxTimestamp(store, timestamp2);
}
