Redis – HyperLogLog Redis HyperLogLog is an algorithm that uses randomization in order to provide an approximation of the number of unique elements in a set using just a constant, and small amount of memory. HyperLogLog provides a very good approximation of the cardinality of a set even using a very small amount of memory […]
Category Archives: redis
Redis – Publish Subscribe Redis Pub/Sub implements the messaging system where the senders (in redis terminology called publishers) sends the messages while the receivers (subscribers) receive them. The link by which the messages are transferred is called channel. In Redis, a client can subscribe any number of channels. Example Following example explains how publish subscriber […]
Redis – Connections Redis connection commands are basically used to manage client connections with Redis server. Example Following example explains how a client authenticates itself to Redis server and checks whether the server is running or not. redis 127.0.0.1:6379> AUTH “password” OK redis 127.0.0.1:6379> PING PONG Redis Connection Commands Following table lists some basic commands […]