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

Xiaobian to share with you the advantages and disadvantages of redis database, I hope you read this article after the harvest, let us discuss it together!

Advantages and disadvantages of redis database:

What are the benefits of using redis?

(1)Fast, because the data is stored in memory, similar to HashMap, the advantage of HashMap is that the time complexity of lookup and operation is O(1)

(2)Support rich data types, support string, list, set, sorted set, hash

(3)Support transactions, operations are atomic, the so-called atomicity means that changes to data are either all executed or not executed

(4)Rich features: can be used for caching, messages, set expiration time by key, will be automatically deleted after expiration

What are the advantages of redis over memcached?

(1)memcached All values are simple strings, redis as its replacement, supporting richer data types

(2)Redis is much faster than memcached.

(3)redis can persist its data

3. Redis common performance problems and solutions:

(1)Master is best not to do any persistence work, such as RDB memory snapshots and AOF log files

(2)If the data is important, a Slave turns on AOF to backup the data, and the policy is set to synchronize once per second.

(3)For speed of master-slave replication and stability of connection, Master and Slave should preferably be in the same local area network

(4)Try to avoid adding slaves to a stressful master

(5)Master-slave replication does not use a graphical structure, but a one-way linked list structure is more stable, i.e.: Master

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