Hi Yingjie, I read this post and the next one as well ( https://flink.apache.org/2019/07/23/flink-network-stack-2.html).
I mean the bandwidth of the channels between two physical operators. When they are in different hosts, so when the channels are a network channel. Thanks *--* *-- Felipe Gutierrez* *-- skype: felipe.o.gutierrez* *--* *https://felipeogutierrez.blogspot.com <https://felipeogutierrez.blogspot.com>* On Thu, Nov 28, 2019 at 5:07 AM yingjie cao <yjclove...@gmail.com> wrote: > Hi Felipe, > > That depends on what do you mean by 'bandwidth'. If you mean the > capability of the network stack, the answer would be no. > > Here is a post about Flink network stack which may help: > https://flink.apache.org/2019/06/05/flink-network-stack.html. > > Thanks, > Yingjie > > Felipe Gutierrez <felipe.o.gutier...@gmail.com> 于2019年11月27日周三 下午11:13写道： > >> Hi community, >> >> I have a question about backpressure. Suppose a scenario that I have a >> map and a reducer, and the reducer is back pressuring the map operator. I >> know that the reducer is processing tuples at a lower rate than it is >> receiving. >> >> However, can I say that at least one channel between the map and the >> reducer is totally using its available bandwidth? >> >> My guess is it is not, at least in the beginning. But as the time goes on >> the tuples will be queued in the network buffer of the reducer and then the >> bandwidth will be 100% of usage. Am I right? >> >> Thanks, >> Felipe >> >> >>
