redis 的过期策略都有哪些?内存淘汰机制都有哪些?手写一下 LRU 代码实现?

redis 的过期策略和内存淘汰机制,过期策略采用定期(随机)删除,惰性删除,只有用户查询时若过期则删除。但这样会导致被大量冷数据占用,所以又引入了内存淘汰机制,其中,移除最近最少使用的 key 最为常用

redis 的过期策略都有哪些?内存淘汰机制都有哪些?手写一下 LRU 代码实现?

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