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I’ve been thinking lately about the problem of scaling a service like Twitter or the Facebook news feed. When a user visits the site, you want to show her a list of all the recent updates from her friends, sorted by date. It’s easy when the user doesn’t have too many friends and all the updates are on a single database (as in Twoorl’s case :P). You use this query: "select * from update where uid i
With the recent brouhaha over Twitter’s scalability problems, I thought, wouldn’t it be fun to write a Twitter clone in Erlang? Last weekend was cold and rainy here in Palo Alto, so I sat down and hacked one, and thus Twoorl was born. It took me one full day plus a couple of evenings. The codebase is about 1700 lines (including comments). You can get it at http://code.google.com/p/twoorl Note: you
In my time wasting activities on geeky social news sites, I’ve been seeing more and more articles about Scala. The main reasons I became interested in Scala are 1) Scala is an OO/FP hybrid, and I think that any attempt to introduce more FP concepts into the OO world is a good thing and 2) Scala’s Actors library is heavily influenced by Erlang, and Scala is sometimes mentioned in the same context a
In Response to “What Sucks About Erlang” Posted by Yariv on March 09, 2008 Damien Katz’s latest blog post lists some ways in which Damien Katz thinks Erlang sucks. I agree with some of these points but not with all of them. Below are my responses to some of his complaints: 1. Basic Syntax I’ve heard many people express their dislike for the Erlang syntax. I found the syntax a bit weird when I
Amazon SimpleDB Runs on Erlang Posted by Yariv on December 14, 2007 I just came across this blog post: http://www.satine.org/archives/2007/12/13/amazon-simpledb/. The author got the scoop that Amazon’s just-released SimpleDB runs on Erlang. This is actually the second Amazon Web Service that runs on Erlang — at least, if the rumors I’ve heard that Amazon SQS was built with Erlang as well are t
Erlang-Style Concurrency in Google Gears Posted by Yariv on July 23, 2007 I heard about Google Gears when it came out a few weeks ago, but only a couple of days I took it for a short test drive. I was surprised to see that Google Gears uses Erlang-style concurrency (well, sort of). Google Gears supports asynchronous background processing using the WorkerPool module, which lets your Google Gear
Erlang + Yaws vs. Ruby on Rails Posted by Yariv on July 11, 2006 Ruby on Rails is great. It makes web development easy, fun and productive. The MVC separation between layers is well thought out and the Ruby language, although painfully slow is quite suitable for quick projects that emphasize developer productivity over raw performance. Although I love Ruby on Rails, I just keep gravitating bac
Introducing ErlyWeb: The Erlang Twist on Web Frameworks Posted by Yariv on October 27, 2006 If you’ve been reading this blog for a while and you’ve been connecting the dots, you probably know where this is going… :) I you haven’t, that’s ok — my old postings aren’t going anywhere. There’s a lot of Erlang goodness in them for you to soak up at your leisure as you’re getting up to speed on this
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