需要從redis-cluster中刪除指定的key

迴圈每個主節點的版本：

[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','172.31.32.234']
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: 如果未設定過期時間
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)

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

[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()

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！

【Redis】 redis-cluster刪除指定的key

需要從redis-cluster中刪除指定的key

迴圈每個主節點的版本：

連結叢集版本

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