@Test(timeout = 5000)
public void testTruncateHints() throws Exception {
Keyspace systemKeyspace = Keyspace.open("system");
ColumnFamilyStore hintStore = systemKeyspace.getColumnFamilyStore(SystemKeyspace.HINTS_CF);
hintStore.clearUnsafe();
// insert 1 hint
RowMutation rm = new RowMutation(KEYSPACE4, ByteBufferUtil.bytes(1));
rm.add(
STANDARD1_CF,
ByteBufferUtil.bytes(String.valueOf(COLUMN1)),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
System.currentTimeMillis());
HintedHandOffManager.instance
.hintFor(
rm,
System.currentTimeMillis(),
HintedHandOffManager.calculateHintTTL(rm),
UUID.randomUUID())
.apply();
assert getNoOfHints() == 1;
HintedHandOffManager.instance.truncateAllHints();
while (getNoOfHints() > 0) {
Thread.sleep(100);
}
assert getNoOfHints() == 0;
}
// Test compaction of hints column family. It shouldn't remove all columns on compaction.
@Test
public void testCompactionOfHintsCF() throws Exception {
// prepare hints column family
Keyspace systemKeyspace = Keyspace.open("system");
ColumnFamilyStore hintStore = systemKeyspace.getColumnFamilyStore(SystemKeyspace.HINTS_CF);
hintStore.clearUnsafe();
hintStore.metadata.gcGraceSeconds(36000); // 10 hours
hintStore.setCompactionStrategyClass(SizeTieredCompactionStrategy.class.getCanonicalName());
hintStore.disableAutoCompaction();
// insert 1 hint
RowMutation rm = new RowMutation(KEYSPACE4, ByteBufferUtil.bytes(1));
rm.add(
STANDARD1_CF,
ByteBufferUtil.bytes(String.valueOf(COLUMN1)),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
System.currentTimeMillis());
HintedHandOffManager.instance
.hintFor(
rm,
System.currentTimeMillis(),
HintedHandOffManager.calculateHintTTL(rm),
UUID.randomUUID())
.apply();
// flush data to disk
hintStore.forceBlockingFlush();
assertEquals(1, hintStore.getSSTables().size());
// submit compaction
FBUtilities.waitOnFuture(HintedHandOffManager.instance.compact());
while (CompactionManager.instance.getPendingTasks() > 0
|| CompactionManager.instance.getActiveCompactions() > 0) TimeUnit.SECONDS.sleep(1);
// single row should not be removed because of gc_grace_seconds
// is 10 hours and there are no any tombstones in sstable
assertEquals(1, hintStore.getSSTables().size());
}