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比如在一个db里，有一堆键为topic:xxxxxx和user:xxxxxx的值，而如果我只想让所有的user:xxxxxx失效，有什么办法吗？
topic:xxxxxx
user:xxxxxx
这是一个很常见的应用场景，比如user:xxxxxx对应的表结构改变了，需要重新缓存，而我不希望影响其他的数据。
我想到的是用KEYS user:*命令来遍历所有符合条件的数据。但是这个命令太耗资源了，有什么其它办法吗？
KEYS user:*
光阴似箭催人老，日月如移越少年。
user的所有键的IDshould be put into a list for management, so that it is easy to read
user
ID
Shouldn’t this kind of data be stored in a hash type?
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user的所有键的IDshould be put into a list for management, so that it is easy to readShouldn’t this kind of data be stored in a hash type?