// with two SSTables
ColumnFamilyStoreUtils.writeColumnFamily(rms);
ColumnFamilyStore store = ColumnFamilyStoreUtils.writeColumnFamily(rms);
// force a major compaction, and wait for it to finish
MerkleTree old = aes.getCachedTree(tablename, cfname, LOCAL);
CompactionManager.instance().submitMajor(store, 0).get(5000, TimeUnit.MILLISECONDS);
// check that a tree was created and cached
flushAES().get(5000, TimeUnit.MILLISECONDS);
assert old != aes.getCachedTree(tablename, cfname, LOCAL);