Brian, Sounds good, I'm glad you got it working.
Tim On Mon, Feb 1, 2021, 10:05 PM Brian Ramprasad <bri...@cs.toronto.edu> wrote: > Hi Tim, > > Thanks for your reply. I actually came across your stack overflow post and > I tried it out but it didn’t work for me. > > I ended up using multiple bridges between datacenter. This allows us to > have more than one tcp session to get more acks on the wire. Basically I > needed to adjust the number of bridges based on the amount of latency I was > experiencing. It was trial and error approach to determine the correct > number of bridges. > > > Brian > > > On Jan 12, 2021, at 10:20 PM, Tim Bain <tb...@alumni.duke.edu> wrote: > > > > Early in my time as an ActiveMQ user, I ran into unexpectedly poor > > performance between a network of ActiveMQ 5.x brokers across a > high-latency > > network link. The particular situation I had involved links that were > idle > > long enough for the TCP congestion window to contract back to its min > value > > between bursts of traffic, resulting in overall low throughput. The > > solution ended up being tweaks to the TCP configuration on the hosts in > > question, though it also turned out that the problem would only occur in > > certain somewhat unlikely scenarios and was mainly an artifact of my > > simplistic test case. Full details are at > > > https://stackoverflow.com/questions/25494929/3x-latency-observed-in-activemq-only-for-higher-wan-latencies > > . > > > > This may or may not be relevant to your situation (though it's worth > > investigating), but there's a relevant general conclusion to be drawn: > > sometimes the root cause of a problem exists outside of the broker > itself, > > and so your attempts to characterize the problem need to consider not > only > > the broker but also other elements such as the network stack. (Your > > environment won't give you any control over the network itself from the > > sound of it, otherwise I'd include that in the list of things to > > instrument.) > > > > Tim > > > > On Tue, Jan 12, 2021, 8:23 AM Brian Ramprasad <bri...@cs.toronto.edu> > wrote: > > > >> Hi Everyone, > >> > >> > >> I am trying setup a network of 3 brokers, one in each Amazon datacenter. > >> The latency between the datacenters is quite high (25-150ms) and it is > >> severely impacting the throughput as compared to running all 3 brokers > in > >> the same datacenter. The 3 brokers are connected in a pipeline (1->2->3) > >> using Core bridges. > >> > >> I have tried increasing the tcpSendBufferSize and the > tcpReceiveBufferSize > >> on the acceptors in the broker.xml but it does not seem to improve the > >> throughput. When I use a really small buffer, the throughput goes down > even > >> further so I know that changing the buffer size is having an effect. > >> > >> Does anyone have an idea of what other settings I can try to improve the > >> throughput? > >> > >> Thanks! > >> > >> Brian R > >> > >> > >> > >
