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POSame Machine Erlang communication
 

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    <p>I need an answer to the following question to help understand what approach I should be taking to interface with Erlang. AFAIK Erlang on a SMP UNIX box uses the multi-process approach. In this case it should do same machine IPC.</p> <ol> <li>Does Erlang use UNIX domain sockets for UNIX ? </li> <li><p>Does it use named-pipes for windows ? </p></li> <li><p>If it does not implement both constructs above -- i.e., no named-pipes for windows; it must have to fallback to sockets, on windows. </p></li> <li><p>How are the above mentioned principles implemented, do they use message oriented, single-thread per channel, asynchronous constructs or is it something else ? </p></li> <li><p>If my line of reasoning above is incorrect, does it use a master-child tree and all other processes communicate -- indirectly -- through the master ? </p></li> </ol> <p>-- edit 1 --</p> <p><a href="http://www.erlang.org/doc/man/ei.html" rel="nofollow noreferrer">Link</a> to the erlang binary format documentation.</p> <p>The universal concensus is that Unix Domain Sockets outperform <a href="https://stackoverflow.com/questions/257433/postgresql-unix-domain-sockets-vs-tcp-sockets">TCP/IP</a>. I think I will try to extend Erlang to use the better primitives provided. I also strongly suspect that epol and windows IOPC is not used in the TCP/IP event loop -- I will post back once I have audited the code.</p> <p>Another <a href="https://stackoverflow.com/questions/1478831/erlang-unix-domain-socket-support">SO post</a> that asserts that Erlang indeed, does not support anything other than TCP and UDP.</p> <p>There are two Erlang libraries for communication <a href="http://www.erlang.org/doc/man/erl_connect.html" rel="nofollow noreferrer"><code>Erlang node -&gt; c_node</code></a> and <a href="http://www.erlang.org/doc/man/ei_connect.html" rel="nofollow noreferrer"><code>c_node -&gt; Erlang_node</code></a></p> <p>The Erlang <a href="http://www3.erlang.org/documentation/doc-4.8.1/pdf/sockets-1.0.5.pdf" rel="nofollow noreferrer">module for sockets</a> allows Unix Dom Sockets to be opened under UNIX.</p>
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    1. COrelevant SO question: http://stackoverflow.com/questions/1478831/erlang-unix-domain-socket-support
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