as a poor man who cannot afford a piece of cloud Amazon/EC2 or even just one high-end $50k router that indeed can well handle 64k simultaneous persistent tcp connections, udp seems the only choice to serve a million of users.
also, afaik, for rtp apps that demand low latency, udp seems far superior to tcp. On Jul 1, 11:51 pm, Bob Kerns <r...@acm.org> wrote: > Not necessarily. If you need what amounts logically to a reliable > connection, simulating it yourself with UDP may not help your > scalability, unless you're bpassing a flawed kernel implementation. > > I can think of a few high traffic sites that use TCP connections > exclusively, scaled up beyond your or my wildest dreams. > > On Jul 1, 5:52 pm, HeHe <cnm...@gmail.com> wrote: > > > > > if the statement "I concluded that this is not allowed when using a > > non LAN connection." were true, all RTP apps would fail on 3G > > networks. but most if not all of them seem working well. > > > meanwhile, servers requiring *persistent tcp connections* may have > > scalability issue. > > > On Jul 1, 3:18 pm, Miguel Morales <therevolti...@gmail.com> wrote: > > > > I was never able to receive udp packets from my server onto my phone > > > that's connected a 3G network. > > > I concluded that this is not allowed when using a non LAN connection. > > > Phone to phone TCP works from what I've heard, but frankly I don't see > > > the advantages unless your game REALLY needs it. > > > > What works for me is of course having all players communicate via a > > > common server and try to have the latency as low as possible. > > > > There was a thread about this where I gave my two cents and > > > experience. I use a combination of perl, erlang/rabbitmq, and java. > > > You can find the thread > > > here:http://groups.google.com/group/android-developers/browse_thread/threa...... > > > > Miguel. > > > > On Thu, Jul 1, 2010 at 9:40 AM, HeHe <cnm...@gmail.com> wrote: > > > > i would suggest that you try udp with your app because, against the > > > > same well-designed nat, often a very good tcp "hole punch" technique > > > > has a much higher failure rate than a fair udp one. > > > > > On Jul 1, 8:44 am, WuffIT Tech <wuffi...@gmail.com> wrote: > > > >> I understand that the IP is subject to change but that is not my > > > >> concern. If a connection is dropped, I can always send the other > > > >> phone my IP address and reconnect. I have come to the conclusion that > > > >> there is not a way to do this without actually using a third party > > > >> server. My question now is how should I implement this server. Any > > > >> good server examples out there that is similar to what I need? My > > > >> overall objective is to have a server that will route a message from > > > >> one phone to another like an IM program. > > > > >> On Jun 15, 5:47 am, Matthew Powers <mtpow...@gmail.com> wrote: > > > > >> > I would worry about your IP address changing as you move in and out > > > >> > of > > > >> > different networks, your IP address is not constant > > > > >> > On Thu, Jun 10, 2010 at 2:40 PM, WuffIT Tech <wuffi...@gmail.com> > > > >> > wrote: > > > >> > > Hi, > > > > >> > > I am new to this forum and I would like to throw out this question > > > >> > > and > > > >> > > hopefully someone can point me in the right direction. I am > > > >> > > developing > > > >> > > an Android application and I would like to setup a tcp/ip type of > > > >> > > connection between two Android phones using the 3G/Edge network. My > > > >> > > test version will establish a connection if I have both phones on a > > > >> > > lan using wifi but when I use T-Mobile's network a connection is > > > >> > > not > > > >> > > established. Could this issue be a port or ip address? Thanks in > > > >> > > advance. > > > > >> > > -- > > > >> > > You received this message because you are subscribed to the Google > > > >> > > Groups "Android Developers" group. > > > >> > > To post to this group, send email to > > > >> > > android-developers@googlegroups.com > > > >> > > To unsubscribe from this group, send email to > > > >> > > android-developers+unsubscr...@googlegroups.com<android-developers%2Bunsubs > > > >> > > cr...@googlegroups.com> > > > >> > > For more options, visit this group at > > > >> > >http://groups.google.com/group/android-developers?hl=en > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "Android Developers" group. > > > > To post to this group, send email to android-developers@googlegroups.com > > > > To unsubscribe from this group, send email to > > > > android-developers+unsubscr...@googlegroups.com > > > > For more options, visit this group at > > > >http://groups.google.com/group/android-developers?hl=en > > > > --http://developingthedream.blogspot.com/,http://diastrofunk.com,http:/..., > > > ~Isaiah 55:8-9 -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
