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Redis中redis-cluster如何删除指定的key

发表于:2022-08-11 作者:安全数据网编辑
编辑最后更新 2022年08月11日,这篇文章主要为大家展示了"Redis中redis-cluster如何删除指定的key",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Redis中redis-

这篇文章主要为大家展示了"Redis中redis-cluster如何删除指定的key",内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下"Redis中redis-cluster如何删除指定的key"这篇文章吧。

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


  3. import redis

  4. import random

  5. import string

  6. import rediscluster

  7. import time

  8. 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']



  9. def del_keys_without_pipe(newhost):

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

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

  12. start_time = time.time()

  13. result_length = 0

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

  15. if r.ttl(key) == -1: 如果未设置过期时间

  16. print key

  17. # r.delete(key)

  18. result_length += 1

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

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

  21. for i in all_nodes:

  22. 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


  3. import redis

  4. import random

  5. import string

  6. import rediscluster

  7. import time



  8. def del_keys_without_pipe():

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

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

  11. start_time = time.time()

  12. result_length = 0

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

  14. # r.delete(key)

  15. result_length += 1

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

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


  18. del_keys_without_pipe()

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