StackExchange.Redis:批量访问多个哈希 [英] StackExchange.Redis: Batch access for multiple hashes

问题描述

因此，我需要大量访问许多不同的哈希值(在StackExchange.Redis中，我具有不同的RedisKey的哈希值).

So I need to access in bulk many different hashes (in StackExchange.Redis, I have different RedisKey's).

最好(最快)的方法是什么? 例如，对于这两种可能的实现，是正确的吗?哪个效果更好?

What is the best (fastest) way to do it? For example, for these two possible implementations, is either correct? Which one works better?

        List<Task<HashEntry[]>> list = new List<Task<HashEntry[]>>();
        List<RedisKey> keys; //Previously initialized list of keys
        foreach (var key in keys)
        {
            var task = db.HashGetAllAsync(key);
            list.Add(task);
        }
        await Task.WhenAll(list);

2.

            List<Task<HashEntry[]>> list = new List<Task<HashEntry[]>>();
            List<RedisKey> keys; //Previously initialized list of keys
            IBatch batch = db.CreateBatch();
            foreach (var key in keys)
            {
                var task = batch.HashGetAllAsync(key);
                list.Add(task);
            }
            batch.Execute();

推荐答案

性能方面:您为它们计时了吗?

On performance: have you timed them?

除此之外:两者都起作用，并且具有不同的权衡；例如，后者是同步的-避免了 all 的TPL开销和复杂性，可以从中受益.您可能还需要考虑第三个选项-一个Lua脚本，该脚本接受键的数组作为输入，并为每个键调用HGETALL.

Other than that: both work, and have different trade-offs; the latter is synchronous, for example - bit benefits from avoiding all of the TPL overheads and complications. You might also want to consider a third option - a Lua script that accepts and array of keys as input and invokes HGETALL for each.

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