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<!DOCTYPE html>
<html lang="en" prefix="og: http://ogp.me/ns# fb: https://www.facebook.com/2008/fbml">
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<title>Das Keyboard Shredder</title>
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Das Keyboard Shredder </a>
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<article>
<h2><a href="./fun-with-macros-and-parquet-avro.html">Fun with macros and parquet-avro</a></h2>
<div class="well well-sm">
<footer class="post-info">
<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2015-01-08T14:01:00-05:00"> Thu 08 January 2015</time>
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<span class="label label-default">Category</span>
<a href="./category/code.html">code</a>
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<a href="./tag/avro.html">avro</a>
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<a href="./tag/macro.html">macro</a>
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<a href="./tag/parquet.html">parquet</a>
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<a href="./tag/scala.html">scala</a>
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<div class="summary"><p>I recently had some fun building <a href="https://github.com/nevillelyh/parquet-avro-extra">parquet-avro-extra</a>, an add-on module for <a href="https://github.com/Parquet/parquet-mr/tree/master/parquet-avro">parquet-avro</a> using <a href="http://scalamacros.org/">Scala macros</a>. I did it mainly to learn Scala macros but also to make it easier to use <a href="http://parquet.incubator.apache.org/">Parquet</a> with <a href="http://avro.apache.org/">Avro</a> in a data pipeline.</p>
<h2>Parquet and Avro</h2>
<p>Parquet is a columnar storage system designed for <span class="caps">HDFS …</span></p>
<a class="btn btn-default btn-xs" href="./fun-with-macros-and-parquet-avro.html">more ...</a>
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<hr/>
<article>
<h2><a href="./three-reasons-a-data-engineer-should-learn-scala.html">Three Reasons a Data Engineer Should Learn Scala</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-11-17T23:15:00-05:00"> Mon 17 November 2014</time>
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<div class="summary"><p><em>This article was written in collaboration with <a href="https://www.hakkalabs.co">Hakka Labs</a> (<a href="https://www.hakkalabs.co/articles/three-reasons-data-eng-learn-scala">original link</a>)</em></p>
<p>There has been a lot of debate over Scala lately, including criticisms like <a href="http://java.dzone.com/articles/i-dont-scala">this</a>, <a href="http://overwatering.org/blog/2013/12/scala-1-star-would-not-program-again/">this</a>, <a href="http://www.infoq.com/news/2011/11/yammer-scala">this</a>, and defenses like <a href="http://blog.gridgainsystems.com/in-defense-of-scala-response-to-i-dont-like-scala/">this</a> and <a href="http://blog.gridgainsystems.com/in-defense-of-scala-part-2/">this</a>. Most of the criticisms seem to focus on the language’s complexity, performance, and integration with existing …</p>
<a class="btn btn-default btn-xs" href="./three-reasons-a-data-engineer-should-learn-scala.html">more ...</a>
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<h2><a href="./scala-workshop.html">Scala Workshop</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-10-04T21:52:00-04:00"> Sat 04 October 2014</time>
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<a href="./category/code.html">code</a>
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<a href="./tag/scala.html">scala</a>
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<div class="summary"><p>While there are many Scala tutorials and books available, very few of them focus on big data. I did a couple of workshops at Spotify focusing on these areas and here are the <a href="/slides/workshop.html">slides</a>.</p>
<iframe src="/slides/workshop.html" width="800" height="450"></iframe>
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<article>
<h2><a href="./using-cql-with-legacy-column-families.html">Using <span class="caps">CQL</span> with legacy column families</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-09-13T20:47:00-04:00"> Sat 13 September 2014</time>
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<span class="label label-default">Category</span>
<a href="./category/code.html">code</a>
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<a href="./tag/cassandra.html">cassandra</a>
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<a href="./tag/cql.html">cql</a>
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<div class="summary"><p>We use <a href="http://cassandra.apache.org/">Cassandra</a> extensively <a href="http://www.slideshare.net/JimmyMrdell/playlists-at-spotify-cassandra-summit-london-2013?related=1">at work</a>, and up till recently we’ve been using mostly Cassandra 1.2 with <a href="https://github.com/Netflix/astyanax">Astyanax</a> and <a href="https://thrift.apache.org/">Thrift</a> protocol in Java applications. Very recently we started adopting Cassandra 2.0 with <span class="caps">CQL</span>, <a href="https://github.com/datastax/java-driver">DataStax Java Driver</a> and binary protocol.</p>
<p>While one should move to <span class="caps">CQL</span> schema to …</p>
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<h2><a href="./dotfiles-update.html">dotfiles update</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-08-21T22:14:00-04:00"> Thu 21 August 2014</time>
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<a href="./category/code.html">code</a>
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<a href="./tag/dotfiles.html">dotfiles</a>
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<div class="summary"><p>I’ve been using my current <a href="./dotfiles.html">dotfiles</a> setup for a while and felt it’s time to freshen up. I focused on updating the look and feel of Vim and tmux this round.</p>
<p>First I switched to <a href="https://github.com/tomasr/molokai">molokai</a> color theme for Vim, <a href="http://macromates.com/">TextMate</a> (monokai) and <a href="http://www.jetbrains.com/idea/">IntelliJ <span class="caps">IDEA</span></a> (using <a href="https://github.com/y3sh/Intellij-Colors-Sublime-Monokai">this</a>). I …</p>
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<article>
<h2><a href="./on-being-a-polyglot.html">On being a polyglot</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-08-21T21:26:00-04:00"> Thu 21 August 2014</time>
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<a href="./category/code.html">code</a>
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<a href="./tag/c.html">c</a>
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<a href="./tag/cpp.html">cpp</a>
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<a href="./tag/python.html">python</a>
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<a href="./tag/javascript.html">javascript</a>
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<a href="./tag/scala.html">scala</a>
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<a href="./tag/java.html">java</a>
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<a href="./tag/clojure.html">clojure</a>
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<a href="./tag/haskell.html">haskell</a>
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<div class="summary"><p>I’m kind of known as a polyglot among coworkers. We would often argue that instead of hiring great Java/Python/C++ developers, we should rather strive to hire great engineers with strong <span class="caps">CS</span> fundamentals who can pick up any language easily. I came from scientific computing background, doing mostly …</p>
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<article>
<h2><a href="./how-many-copies.html">How many copies</a></h2>
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<footer class="post-info">
<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-08-02T20:48:00-04:00"> Sat 02 August 2014</time>
</span>
<span class="label label-default">Category</span>
<a href="./category/code.html">code</a>
<span class="label label-default">Tags</span>
<a href="./tag/data.html">data</a>
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<a href="./tag/performance.html">performance</a>
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<a href="./tag/scala.html">scala</a>
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<div class="summary"><p>One topic that came up a lot when optimizing Scala data applications is the performance of standard collections, or the hidden cost of temporary copies. The collections <span class="caps">API</span> is easy to learn and maps well to many Python concepts where a lot of data engineers are familiar with. But the …</p>
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<article>
<h2><a href="./why-functional-why-scala.html">Why Functional? Why Scala?</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-07-28T23:03:00-04:00"> Mon 28 July 2014</time>
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<a href="./tag/fp.html">fp</a>
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<a href="./tag/scala.html">scala</a>
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<a href="./tag/data.html">data</a>
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<div class="summary"><p>I recently did an internal talk at Spotify on why every data engineer should know something about functional programming languages and Scala. And here are the <a href="/slides/pitch.html">slides</a>.</p>
<iframe src="/slides/pitch.html" width="800" height="450"></iframe>
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<h2><a href="./light-table.html">Light Table</a></h2>
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<footer class="post-info">
<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-07-28T00:01:00-04:00"> Mon 28 July 2014</time>
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<span class="label label-default">Category</span>
<a href="./category/code.html">code</a>
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<a href="./tag/clojure.html">clojure</a>
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<a href="./tag/intellij-idea.html">intellij-idea</a>
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<a href="./tag/light-table.html">light-table</a>
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<div class="summary"><p>I recently picked up <a href="http://www.lighttable.com/">Light Table</a> for <a href="http://clojure.org/">Clojure</a> development and liked it. Form evaluation works out of the box and indentation is better than that in <a href="http://plugins.jetbrains.com/plugin/?id=4050">La Clojure</a> plugin for <a href="http://www.jetbrains.com/idea/">IntelliJ <span class="caps">IDEA</span></a>.</p>
<p>I particularly like the idea of command bar, which allows you to search for Light Table commands by …</p>
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<h2><a href="./dotfiles.html">dotfiles</a></h2>
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<span class="label label-default">Date</span>
<span class="published">
<i class="fa fa-calendar"></i><time datetime="2014-07-27T09:43:00-04:00"> Sun 27 July 2014</time>
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<span class="label label-default">Category</span>
<a href="./category/code.html">code</a>
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<a href="./tag/dotfiles.html">dotfiles</a>
/
<a href="./tag/git.html">git</a>
/
<a href="./tag/tmux.html">tmux</a>
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<a href="./tag/vim.html">vim</a>
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<a href="./tag/xmonad.html">xmonad</a>
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<a href="./tag/zsh.html">zsh</a>
</footer><!-- /.post-info --> </div>
<div class="summary"><p>My <a href="https://github.com/nevillelyh/dotfiles/">dotfiles</a> is probably the most copied code among my coworkers and today I will give a little break down of the code base.</p>
<h2>zsh</h2>
<p>I switched to <a href="http://www.zsh.org/">zsh</a> 3 years ago and never looked back. There’s also <a href="https://github.com/robbyrussell/oh-my-zsh">oh-my-zsh</a>, a framework for managing <span class="caps">ZSH</span> configuration. The features I found …</p>
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<p>
<strong>About Neville Li</strong><br/>
Data infrastructure @<a href="https://twitter.com/Spotify">Spotify</a>, ex-@<a href="https://twitter.com/Yahoo">Yahoo</a> search, das keyboard shredder, author of <a href="https://github.com/spotify/scio">Scio</a>
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<li class="list-group-item"><h4><i class="fa fa-home fa-lg"></i><span class="icon-label">Social</span></h4>
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<li class="list-group-item"><a href="http://open.spotify.com/user/sinisa_lyh"><i class="fa fa-spotify fa-lg"></i> Spotify</a></li>
<li class="list-group-item"><a href="https://github.com/nevillelyh"><i class="fa fa-github-square fa-lg"></i> GitHub</a></li>
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<li class="list-group-item"><a href="http://stackoverflow.com/users/3880836/neville-li"><i class="fa fa-stack-overflow fa-lg"></i> Stack-Overflow</a></li>
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<li class="list-group-item"><a href="https://www.youtube.com/user/sinisalyh/videos"><i class="fa fa-youtube-square fa-lg"></i> YouTube</a></li>
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<li class="list-group-item"><h4><i class="fa fa-home fa-lg"></i><span class="icon-label">Recent Posts</span></h4>
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<a href="./scio-at-philly-ete.html">
Scio at Philly <span class="caps">ETE</span>
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<a href="./joins.html">
Joins
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<a href="./for-comprehensions.html">
For comprehensions
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