How to operate on batches with high efficiency in redis cluster?

Question

I have a map data to cache in redis cluster, such as:

{
    "demoKey:{1}":{"key1":"value1"},
    "demoKey:{2}":{"key2":"value2"},
    "demoKey:{3}":{"key3":"value3"}
}

If using lua script, I get RedisCommandExecutionException with accessing a non local key in a cluster node.

I know there is a way to tag {demokey} to avoid the RedisCommandExecutionException with accessing a non local key, but it leads to all data cache in the same slot, is it a good way?

I can also use RedisTemplate instance to cache data iteratively, but is it with high efficiency?

Appreciating for any help.

Answer 1

Both the answer of your questions depend on the application and use-cases.

... it leads to all data cache in the same slot, is it a good way?

If the number of data with same hashtag is small, say not more than a hundred, it should be fine.

But if the number is large, say hundreds of thousands or even more, it is unlikely to be a good idea. In that case,

... to cache data iteratively

is the option you may have to go for.