February 2018
Intermediate to advanced
382 pages
11h 33m
English
Content preview from Redis 4.x Cookbook
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The maximum number of elements that can be put in a Redis set is 223 - 1.
There is a command called SMEMBERS that can be used to list all elements in a set, however, similar to what we mentioned for HGETALL in Using the hash data type, using SMEMBERS in a large set may block the server, and therefore is not recommended. SSCAN should be used instead for large sets. The usage of SSCAN is very similar to the HSCAN command, which we introduced in Using the hash data type.
Redis provides a group of commands for union (SUNION, SUNIONSTORE), intersection (SINTER, SINTERSTORE) and difference (SDIFF, SDIFFSTORE) operations between sets. The commands without the STORE postfix simply return the resulting set of corresponding operations, ...
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