Skittr, a Twitter clone that scales easily, written in 170 lines of Scala and lift

Re:Skittr, a Twitter clone that scales easily, written in 17... by cstejerean on Tuesday November 20, 2007 @03:05PM (#82102)

Well, I didn't read the entire article, so maybe there was an answer to this but I'm a bit weary of claims like "can be modified to scale linearly with the number of machines with 1 week of coding".

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Re:Skittr, a Twitter clone that scales easily, written in 17... by dpp on Tuesday November 20, 2007 @07:08PM (#82234)

There are some folks working on the code and we'll be testing it on an Amazon EC2 cluster. Once there's stuff to share, I'll share it.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by cstejerean on Tuesday November 20, 2007 @07:28PM (#82242)

Excellent, please do.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by henning on Tuesday November 20, 2007 @04:12PM (#82146)

You're perfectly justified in being skeptical, but if anyone could code such a piece of software, David Pollak could.

He was a mature developer when I was an infant.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by yariv on Tuesday November 20, 2007 @08:38PM (#82280)

The main difference in effort between a Scala/lift and Erlang/ErlyWeb implementation is that making the Erlang app distributed and linearly scalable doesn't require any coding. Just store the process IDs in Mnesia and when you add more nodes add those nodes to the Mnesia schema and you're done.

Not having to restart your Erlang server (and therefore lose your client connections) to do code updates is also pretty cool.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by michaelneale on Tuesday November 20, 2007 @10:52PM (#82323)

So the app writes itself? wow.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by yariv on Tuesday November 20, 2007 @11:22PM (#82339)

It doesn't write itself. Mnesia is a distributed database. When you use it you get distribution for free.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by michaelneale on Wednesday November 21, 2007 @12:32AM (#82359)

I was making a joke ;) However, looking at the scala code it doesn't look like it is written to scale at all. I can't really see any thing in it that indicates it was written in a certain way. Its more a pattern to follow I guess.

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Re:Skittr, a Twitter clone that scales easily, written in 17... by ntoshev on Wednesday November 21, 2007 @07:42AM (#82429)

This whole thread smells of lack of understanding of software. Hackers should know how inefficient an SQL server would be to handle Twitter-type tasks, versus specialized code. This is supposed to be hacker's news, not small business news.

news.YC is a good example of an efficient architecture. If it was written in Ruby/MySQL, pg would need at least 20 servers to keep up with the current traffic, versus a single box now. And the latency would never be as good as it is now.

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