Redis FAQ

AOF base file appendonly.aof.1.base.rdb
AOF incr file appendonly.aof.1.incr.aof

# delete by pattern
redis-cli -p 6379 --scan --pattern 'city:*' -i 0.01 | xargs -L 100 redis-cli -p 6379 unlink

MISCONF Redis is configured to save RDB snapshots, but is currently not able to persist on disk. Commands that may modify the data set are disabled.

redis-cli
# config set stop-writes-on-bgsave-error no

# 如果增加了 maxclients 也要增加系统限制
ulimit -Sn 100000
sysctl -w fs.file-max=100000

SET key uuid PX timeout NX

if redis.call('GET', KEYS[1]) == ARGV[1] then
  return redis.call('DEL', KEYS[1])
end
return 0

if redis.call('GET', KEYS[1]) == ARGV[1] then
  return redis.call('PEXPIRE', KEYS[1], ARGV[2])
end
return 0

WATCH key  # Begin watching the key for changes
GET key    # Retrieve its value, return an error if not equal to the lock's UUID
MULTI      # Start transaction
DEL key    # Delete the key
EXEC       # Execute the transaction, which will fail if the key had expired