使stress.py与Cassandra一起工作时出现问题

Question

我正在尝试运行Cassandra附带的stress.py压力测试。当我尝试运行./stress.py时，我得到以下输出：

Traceback (most recent call last):
  File "/usr/lib/python2.6/multiprocessing/process.py", line 232, in _bootstrap
    self.run()
  File "./stress.py", line 238, in run
    self.cclient.batch_mutate(cfmap, consistency)
  File "/opt/cassandra/apache-cassandra-0.7.6-2-src/contrib/py_stress/cassandra/Cassandra.py", line 784, in batch_mutate
    self.recv_batch_mutate()
  File "/opt/cassandra/apache-cassandra-0.7.6-2-src/contrib/py_stress/cassandra/Cassandra.py", line 808, in recv_batch_mutate
    raise result.ue
UnavailableException: UnavailableException()
Process Inserter-49:

有什么想法吗？谢谢

Answer 1

UnavailableException意味着有太多的节点关闭。使用"nodetool ring“找出是哪一个。

另外:除非你在定制stress.py，否则java stress tool的速度要快得多。(对于python，您需要大约1:1的客户端机器与cassandra机器来完全饱和它；而使用java，这更像是1:5。)