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161

answers:

1
Q: 

Server Push vs Server pull in IIS

Hi,

I was thinking of building a chat application in ASP .NET. I was thinking of either using push or pull. I have found that pull is more scalable than push. But does any body know if the web chat messenger like gtalk, yahoo etc use pull or push ?.

Thanks.

+1  A: 

Gmail and such are using comet. This is a push architecture.

There is a nice article on ajaxian describing how comet works, this technique is used to push data from the server to the client.

But I am really looking forward the WebSocket, I think it's gonna make a lot of things more easy.

RageZ  2009-11-20 03:51:24
but if it is server push how does gtalk manage scalability.
Prashant  2009-11-20 03:53:36
actually push scale better then pull, there is only one connection by user so it's easy to calculate the number of server you need. Simply you need a webserver adapted to that, Apache is creating process for each bunch of client, while some other webserver just wait for data on each socket.
RageZ  2009-11-20 03:55:21
comet have also a bunch of special webserver for such applications
RageZ  2009-11-20 03:55:51
I don't think IIS is adapted for a comet architecture
RageZ  2009-11-20 03:59:24
Don't know much about comet on IIS, but last I read somewhere there is this thing called WebSync that supposedly do comet for IIS
Jimmy Chandra  2009-11-20 04:50:45

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