redis distributed lock

Preface Distributed locks generally have three kinds of implementation methods: 1. Database optimistic lock; 2. Distributed lock based on Redis; 3. Distributed locks based on zookeeper. This blog will introduce the second way to

[2)), #channels) + 1;Return Redis.call (' Publish ', Channels[index], argv[3]); """Def wait_single (channel, myID):return Wait (channel + myID)Def signal_single (channel, data):rand_num = Int (random.random () * 65535)Return Rc.eval (single_cast_script, 0, Channel, str (rand_num), str (data)) Distributed lock Distributed LocksThe realization of

about RedisRedis is one of the NoSQL (no only SQL, non-relational) databases that NoSQL stores data in the form of Key-value. The current mainstream distributed cache technology has REDIS,MEMCACHED,SSDB,MONGODB and so on. Redis can be understood as a caching technique, because its data is cached from it, and it can be understood as a database, because

BackgroundIn many Internet product applications, some scenarios require lock processing, such as: seconds, global Increment ID, floor generation, and so on. Most of the solutions are based on DB, Redis is a single-process single-threaded mode, with queue mode to turn concurrent access into serial access, and multi-client connections to Redis do not have a competi

Redis implements distributed locks, redis When I cleared the email, I found a previous article about the implementation of the redis distributed lock. Someone replied-I randomly scanned the article to prevent deadlocks, the idea i

distributed Lock implementation method A distributed lock based on zookeeper One. Why do I use distributed locks?When the number of application servers exceeds 1, access to the same data can cause access violations (especially write conflicts). Simply using relational datab

locks? At present, there are three kinds of mainstream, from the complexity of the implementation, from the top down to increase the difficulty in turn: Based on database implementation Redis-based implementation Based on zookeeper implementation Either way, in fact, is not perfect, still have to according to the actual scene of our business to choose. based on database implementation: There are usually two ways to do a

Remotely connect to redis and lock redis. Assume that the two redis servers have ip addresses 192.168.1.101 and 192.168.1.103 respectively. How can I access redis on redis 101 through redis