redis 设置成员更新的高效方式 [英] Efficient way redis set member update

问题描述

我有一个 redis 集.这个集合最多可以存储20个成员(添加SADD命令).我的问题是;我需要在需要时更新这些成员.每个成员最多需要进行 10 次修改.集合成员是 json 作为字符串.我脑子里只有解决方案，也没有让所有成员更新并重新创建该集合.但这似乎很愚蠢.

I have a redis set. This set can store 20 members maximum(added withSADD command). My problem is ; I need to update that members when needed. Members need that modification maximum 10 times for every member. Set members are json as a string. There is only solutoin on my mind nor, get all members update and recreate that set again. But it seems iditoic.

我知道有 ZADD 排序集及其分数支持，这似乎也很合适我需要像 json 中的数据一样更新分数，但我只是想知道是否有任何方法可以有效地更新成员，或者在 redis 方式上更新成员是不可接受的吗?

I know there is ZADD sorted set with its score support it seems suitable also I need to update score like data in json , but i just wonder Is there any method updating members in efficient way, or is updating member not acceptable on redis way ?

注意:Redis 数据存储由 node.js 和 java 客户端使用.

推荐答案

集合成员本身是不可变的 - 您可以添加新成员或删除现有成员.就是这样.

Set members themselves are immutable - you can add new members or remove existing ones. That's it.

假设集合是唯一成员的无序集合，请考虑当成员的新值在理论上可修改时集合成员的可能结果:

Given that a set is an unordered collection of unique members, consider the possible outcomes were set members theoretically modifiable when the new value for a member:

1. 与旧值相同 - 未更改集合
2. 已经存在于集合中——相当于删除那个成员
3. 不是 1 或 2 - 相当于删除成员并添加新成员

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