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What does redis sharding mean?

藏色散人
Release: 2019-06-11 09:43:28
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What does redis sharding mean?

#What does redis sharding mean?

Redis’ sharding (Sharding or Partitioning) technology refers to a method of dispersing data into multiple Redis instances. After sharding, each redis owns a part of the original data. subset of the set. (Recommendation: "redis video tutorial")

When the amount of data is very large, this technology can disperse the amount of data to redis instances on several hosts, thereby reducing the cost of a single redis instance. pressure. Sharding technology can use the storage capabilities (here mainly refers to the storage capabilities of memory) and computing capabilities of multiple computers in a more scalable way:

(1)From the perspective of storage capabilities, Sharding technology uses the memory of multiple computers to bear a larger amount of data. Without sharding technology, the storage capacity of redis will be limited to the memory size of a single host.

(2) From the perspective of computing power, sharding technology can make full use of the computing power of multiple cores and multiple hosts by distributing computing tasks to multiple cores or multiple hosts.

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