private MemoryBlobStore bs;
@Test
public void threeNodes() throws Exception {
MemoryDocumentStore ds = new MemoryDocumentStore();
MemoryBlobStore bs = new MemoryBlobStore();
MongoMK.Builder builder;
builder = new MongoMK.Builder();
builder.setDocumentStore(ds).setBlobStore(bs).setAsyncDelay(0);
MongoMK mk1 = builder.setClusterId(1).open();