vaughn

```java @Test public void testOpenGraph() throws Exception { List graphs = openGraphs("test_g1"); final HugeGraph graph = graphs.get(0); graph.initBackend(); CountDownLatch count = new CountDownLatch(1); new Thread(()-> { graph.vertices(); graph.tx().rollback(); count.countDown(); }).start();...

是什么后端呢？rocksdb 吗？现在的实现确实会有不均衡的问题