问题
When we create a managedChannelBuilder and use this to call a grpc-java service call, how many clients can we serve with this? Doesn't this channel be shutdown after individual service call? Say I have a REST interface which accepts REST calls from a browser and from within these REST Service methods, I am making grpc client calls to an independent grpc server. Also I can expect client connections in the range of [4000-5000] concurrently. How well can I make use of this managedChannelBuilder. Do I need just one? Or do I need to pool multiple channelbuilders?
回答1:
Generally, I'd suggest using a single ManagedChannel per endpoint when your code can be easily structured to share it. ManagedChannel multiplexes RPCs and is thread-safe, so it can handle multiple RPCs concurrently.
In rarer cases of high very high throughput, it may make sense to use more than one ManagedChannel. Eventually ManagedChannel (or, maybe Channel) should have support for doing this natively.
来源：https://stackoverflow.com/questions/43119082/what-is-the-maximum-number-of-clients-that-a-grpc-java-managedchannelbuilder-can