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< Erlang ~ Mapping sessions to distributed processes |
| alanw |
 Posted: Wed Dec 24, 2008 3:14 am |
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Joined: 20 Nov 2008
Posts: 3
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I've been learning Erlang and coded some fun stuff over the last few weeks. BTW - I found "Programming Erlang" on the shelf at Barnes and Noble in Southlake TX.
Anyway, I'm writing some code to handle message switching for a mainframe protocol that has a 24-bit session ID. I've already coded the basic protocol, but need to manage a session for each terminal, and handle about 200K simultaneous users. Each session will have a few KB of data.
It's natural to use a process for each session, as I can handle timeouts, etc in a very natural way. My problem is a clean way to map Session ID to/from Pid. Converting a string to an atom, i.e. session 0xF00BAA (hex) might map to the atom sess_f00baa. The problem is that I could easily run out of 1M atoms over the life of the system. I'd also like to distribute the processes across a cluster.
I need to be able to demultiplex messages from the sockets and route them to the process for that session. One thought is Mnesia to store the mappings and let it distribute the data in the cluster.
Anyway, it feels like a problem that somebody has already had to solve before, so pointers to ideas would be most welcome.
Thanks,
Alan. |
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| wuji |
| Posted: Wed Sep 19, 2012 2:28 am |
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| dongdongwu |
| Posted: Wed Sep 19, 2012 2:33 am |
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