How does redis-cluster delete a specified key in Redis
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You need to remove the version of each master node of the specified key loop from redis-cluster:
[root@ip-172-31-39-42] # more delkey-single.py
# encoding: utf-8
Import redis
Import random
Import string
Import rediscluster
Import time
All_nodes= (172.31.39.42) 172.31.36.10 (172.31.47.157) 172.31.36.49 (172.31.40.169)
Def del_keys_without_pipe (newhost):
Pool = redis.ConnectionPool (host=newhost, port=6379, db=0,password='inH7HkD7iXoxKZCi')
R = redis.StrictRedis (connection_pool=pool)
Start_time = time.time ()
Result_length = 0
For key in r.scan_iter (match='user:*:type:*:news:msg', count=100):
If r.ttl (key) =-1: if expiration time is not set
Print key
# r.delete (key)
Result_length + = 1
Print "normal ways end at:", time.time ()-start_time
Print newhost, "normal ways delete numbers:", result_length
For i in all_nodes:
Del_keys_without_pipe (I)
Note: circular links can only link to the master node, if the link slave node will report the following error:
> > 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
Link Cluster version
[root@ip-172-31-39-42] # more delkey-cluster.py
# encoding: utf-8
Import redis
Import random
Import string
Import rediscluster
Import time
Def del_keys_without_pipe ():
Startup_nodes = [{"host": "172.31.39.42", "port": 6379, "db": 0}]
R = rediscluster.StrictRedisCluster (startup_nodes=startup_nodes, password='inH7HkD7iXoxKZCi')
Start_time = time.time ()
Result_length = 0
For key in r.scan_iter (match='user:*:type:*:news:msg', count=100):
# r.delete (key)
Result_length + = 1
Print "normal ways end at:", time.time ()-start_time
Print "normal ways delete numbers:", result_length
Del_keys_without_pipe ()
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