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Redis中redis-cluster如何删除指定的key-创新互联

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需要从redis-cluster中删除指定的key

循环每个主节点的版本：

  1. [root@ip-172-31-39-42 ~]# more delkey-single.py

  2. # encoding: utf-8

  4. import redis

  5. import random

  6. import string

  7. import rediscluster

  8. import time

  9. all_nodes=['172.31.39.42','172.31.36.10','172.31.47.157','172.31.36.49','172.31.40.169','172.31.32.234']

  12. def del_keys_without_pipe(newhost):

  13.     pool = redis.ConnectionPool(host=newhost, port=6379, db=0,password='inH7HkD7iXoxKZCi')

  14.     r = redis.StrictRedis(connection_pool=pool)

  15.     start_time = time.time()

  16.     result_length = 0

  17.     for key in r.scan_iter(match='user:*:type:*:news:msg', count=100):

  18.         if r.ttl(key) == -1:     如果未设置过期时间

  19.            print key

  20.    #       r.delete(key)

  21.         result_length += 1

  22.     print "normal ways end at:", time.time() - start_time

  23.     print newhost,"normal ways delete numbers:", result_length

  24. for i in all_nodes:

  25.         del_keys_without_pipe(i)





注意：循环链接只能去链接主节点，如果链接从节点会报以下的错误：
>>> for key in r.scan_iter(count=10):
...     if r.ttl(key) == -1:
...        print key
... 
Traceback (most recent call last):
  File "", line 2, in
  File "/usr/lib/python2.7/site-packages/redis/client.py", line 1231, in ttl
    return self.execute_command('TTL', name)
  File "/usr/lib/python2.7/site-packages/redis/client.py", line 668, in execute_command
    return self.parse_response(connection, command_name, **options)
  File "/usr/lib/python2.7/site-packages/redis/client.py", line 680, in parse_response
    response = connection.read_response()
  File "/usr/lib/python2.7/site-packages/redis/connection.py", line 629, in read_response
    raise response
redis.exceptions.ResponseError: MOVED 12752 172.31.32.234:6379

链接集群版本

  1. [root@ip-172-31-39-42 ~]# more delkey-cluster.py

  2. # encoding: utf-8

  4. import redis

  5. import random

  6. import string

  7. import rediscluster

  8. import time

  11. def del_keys_without_pipe():

  12.     startup_nodes = [{"host": "172.31.39.42", "port": 6379,"db":0}]

  13.     r = rediscluster.StrictRedisCluster(startup_nodes=startup_nodes, password='inH7HkD7iXoxKZCi')

  14.     start_time = time.time()

  15.     result_length = 0

  16.     for key in r.scan_iter(match='user:*:type:*:news:msg', count=100):

  17.     #        r.delete(key)

  18.         result_length += 1

  19.     print "normal ways end at:", time.time() - start_time

  20.     print "normal ways delete numbers:", result_length

  22. del_keys_without_pipe()

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