Comments on: Why Erlang Is a Great Language for Concurrent Programming

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By: yaar

yaar — Thu, 07 Sep 2006 22:27:55 +0000

Hey Yariv,

As you suggested, I found this post and read it. Now l have many questions about erlang concurrency. For example, how do processes find each other? And how do they learn another process died? How messages get passed over the wire? How processes share access to data structures? Why erlang processes are so lightweight? Is message delivery order guaranteed?

I think it would be interesting if you sometime write a case study of real-world large erlang systems, like the one ericsson built, ejabberd, or mibbo. I guess there are already some outthere, but you will probably do it better.

Good night!

By: Yariv

Yariv — Thu, 17 Aug 2006 23:50:20 +0000

Byron — that’s hilarious! I can’t believe I just sat and watched the whole thing… something must be wrong with me :D

By: Byron

Byron — Thu, 17 Aug 2006 20:45:22 +0000

Axel, in case you haven’t seen it, here’s a cool video of the Erlang engineers demonstrating Erlang’s ‘change code at runtime’ feature on a phone switching network in their lab. An oldie but a goodie.

By: mrevelle

mrevelle — Thu, 17 Aug 2006 12:25:13 +0000

Srini and others:
Just use lightty (or whatnot) to serve static content and redirect all other requests to Yaws.

Yariv:
Thanks for writing this, full of good information. Started learning Haskell recently, now Erlang is next on the list. =)

By: Axel Wolf

Axel Wolf — Thu, 17 Aug 2006 11:09:08 +0000

Great stuff, especially if you think that the language has been in use for over 20 years now.

I’m currently looking into the “change code at runtime” bit in the Erlang book (p. 121). Very interesting.

By: schlenk

schlenk — Thu, 17 Aug 2006 11:05:06 +0000

Would be very interested in seeing how well Yaws performs against AOLserver (http://aolserver.sourceforge.net), which is especially made for heavy concurrent load, unlike apache.

By: Yariv

Yariv — Thu, 17 Aug 2006 10:32:05 +0000

Yes, good point. I don’t know of any benchmarks for Yaws that measure static content performance. You can always run some and tell us what you find :)