相当于Memcached中的Redis哈希？(Equivalent to Redis hashes in Memcached?)

 我正在为我们的应用程序开发一个缓存策略，它使用Redis和Memcached。 
 
 我们根据SQL数据库生成相当长的缓存数据JSON字符串。 由于缓存的数据是一次性的，我想使用Memcached，因此它将驱逐我们不再需要的密钥。 
 
 问题是可以从不同的参数访问一个集合（例如，用户）。 在Redis中我使用Hash，因此我可以在该哈希中访问集合的每个表示的密钥（ hget ），并且仍然能够使用一个命令（ del ）使所有密钥到期。 但是，我找不到像Memcached那样将旧密钥驱逐到给定DB大小的方法。 
 
 所以我的问题是： 
 
 
 
 如何设置Redis以保持最大数据库大小并根据需要逐出密钥？或 
 
 
 如何在Memcached中模拟Redis哈希值，这样我可以轻松地使一组键过期？ 
 

I am working on a caching strategy for our application, which uses both Redis and Memcached.
 
We generate fairly long JSON strings of cached data, calculated from our SQL database. Since the cached data is disposable, I'd like to use Memcached so it'll evict keys that we don't need anymore.
 
The problem is that one collection (say, Users), can be accessed from different parameters. In Redis I'd use a Hash, so I could access keys (hget) in that hash for each representation of the collection and still be able to expire all the keys with one command (del). However, I can't find a way to evict old keys to a given DB size like Memcached would do.
 
So my question is either:
 
 
 
How can I set Redis so it keeps a maximum DB size and evicts keys as needed?, or
 
 
How can I model Redis hashes in Memcached, so I can expire a group of keys easily?
 

原文：https://stackoverflow.com/questions/11123540