【Redis】 redis-cluster刪除指定的key

小亮520cl發表於2018-05-07
Redis

需要從redis-cluster中刪除指定的key


迴圈每個主節點的版本：

  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:     如果未設定過期時間
  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：迴圈連結只能去連結主節點，如果連結從節點會報以下的錯誤：
>>> 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




連結叢集版本

  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()

綜合以上兩種方式，還是使用連結cluster的方式吧，使用的模組也不一樣！

來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/29096438/viewspace-2153950/，如需轉載，請註明出處，否則將追究法律責任。

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