what is distributed queue?

问题

My Understanding :- A distributed destination is a single, logical(not physical) destination to a client which internally contains set of physical destinations (queues or topics) . It helps in scalable applications in terms of High availability(HA) and Load Balancing(LB).

So when i do distributedQueue.put(someObject), distributed queue will put the object on one of the phyicalQueue and also maintains some meta data to record which object lies on which on which queue

Now when i do distributedQueue.receive() , it will refer metadata , poll the data from right queue and serve it to client.

Is that correct ?

回答1:

That would be one way of implementing a distributed queue, yes.

However, in your implementation the metadata store will very quickly become a bottleneck/hot-spot.

来源：https://stackoverflow.com/questions/41878393/what-is-distributed-queue