Shulou(Shulou.com)06/01 Report--

Redis can be distributed.

Memcached can't.

Mangodb is a distributed database, which can store json strings and is of nosql type.

Redis is a cache server, but it is used as a database server

Because it is placed in memory, so the memory consumption is relatively large, generally 128g of 256g of memory

Redis reads up to 110000 / s, writes 80, 000 / s, and data 256K

Redis can speed up the reading speed. You can watch the newly released Weibo and the products at the time of second kill, all of which are stored in redis.

Port 6379

Php-redis needs to be installed

REDIS can be used as keepalived high availability cluster.

Can do read-write separation, using codis

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