Table table = Table.open("Keyspace1");
ColumnFamilyStore cfs = table.getColumnFamilyStore("Standard1");
ByteBuffer key = ByteBufferUtil.bytes("k");
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("c")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
rm.add(new QueryPath("Standard1", null, ByteBufferUtil.bytes("d")), ByteBufferUtil.EMPTY_BYTE_BUFFER, 0);
rm.apply();
cfs.forceBlockingFlush();
rm.apply();
cfs.forceBlockingFlush();