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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HackOn(Data) in Toronto ON -- Solutions Review</title>
<meta name="description" content="HackOn(Data) in Toronto ON -- Solutions Review">
<meta name="author" content="Jacek Laskowski">
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<small>Copyright ©2017 Jacek Laskowski</small>
</div>
<section class="intro" data-transition="zoom">
<h1>Solutions Review</h1>
<h3>HackOn(Data) / Toronto / Sept. 10-11</h3>
</section>
<section>
<section id="about-the-host">
<p>
<img width="20%" src="images/jacek_laskowski_20141201_512px.png" style="border: 0">
</p>
<ul>
<li><b>Jacek Laskowski</b> is an independent consultant</li>
<li><a href="http://spark.apache.org/">Apache Spark</a> and <a href="http://www.scala-lang.org/">Scala</a> exclusively for the past two years</li>
<li>Partner at <b>Value Amplify Consulting Group</b></li>
<li>Contact me at <b>[email protected]</b> or <a href="https://twitter.com/jaceklaskowski">@JacekLaskowski</a></li>
<li>Set out to master <a href="http://spark.apache.org/">Apache Kafka</a></li>
<li>Leader of <a href="http://warsawscala.pl">Warsaw Scala Enthusiasts</a> and <a href="http://www.meetup.com/Warsaw-Spark/">Warsaw Apache Spark</a> / <a href="https://java.net/website/java-champions/bios.html#Laskowski">Java Champion</a></li>
</ul>
</section>
<section id="about-notes">
<p>
<a href="https://bit.ly/mastering-apache-spark">https://bit.ly/mastering-apache-spark</a>
</p>
<p>
<img width="80%" src="images/jaceklaskowski-gitbook-stats.png" style="border: 0">
</p>
</section>
</section>
<section id="agenda">
<h2>Agenda</h2>
<ol>
<li><a href="#/loading-datasets">Loading and Saving Datasets</a></li>
<li><a href="#/standard-functions">Standard Functions</a></li>
<li><a href="#/aggregation">Aggregation - Typed and Untyped Grouping</a></li>
<li><a href="#/windows">Window Aggregates (Windows)</a></li>
<li><a href="#/user-defined-functions">User-Defined Functions (UDFs)</a></li>
<li><a href="#/explain">"Explaining" Query Plans of Windows</a></li>
<li><a href="#/transformers">Transformers</a></li>
<li><a href="#/mllib-model-persistence">ML Pipeline Persistence</a></li>
<li><a href="#/tooling">Tooling - Git & GitHub & Source Code</a></li>
</ol>
</section>
<section>
<section id="loading-datasets">
<h2>Loading Datasets (1 of 3)</h2>
<p>
Please DON'T do this!
</p>
<pre><code>
sc.textFile("...CSV") <-- HERE
.filter(lambda l : "ADD_NUM" not in l)
.map(parseCultureLoc)
</code></pre>
<pre><code>
sc.textFile("...TXT") <-- HERE
.map(parseTwitter)
.filter(lambda t : "toronto" in t['place'].lower()))
</code></pre>
<pre><code>
sc.parallelize(grid)
</code></pre>
</section>
<section>
<h2>Loading Datasets (2 of 3)</h2>
<p>
Please DON'T do this!
</p>
<pre><code>
wdat <- read.df(sqlContext,
"./ParkingTicket/weather/201*",
source = "com.databricks.spark.csv", <-- this
inferSchema = "true",
header="true", skiprows=16)
</code></pre>
<pre><code>
sqlContext.jsonFile(file_path1)
</code></pre>
</section>
<section>
<h2>Loading Datasets (3 of 3)</h2>
<p>
Please DON'T do this!
</p>
<img style="border: 0" src="images/hackondata-jsonfile-warning.png" alt="jsonFile Warning" />
</section>
<section>
<h2>Saving Datasets</h2>
<p>
Please DON'T do this!
</p>
<pre><code>
parking_2015_withTrial_df
.coalesce(1) <------------------------- HERE
.write
.format("com.databricks.spark.csv") <-- HERE
.options(header="true")
.save("/mnt/%s/Parking/Parking_Tags_2015_and_other_data" % MOUNT_NAME)
</code></pre>
</section>
</section>
<section>
<h2>Type Mismatch?</h2>
<p>
Please DON'T do this!
</p>
<img style="border: 0" src="images/hackondata-type-mismatch.png" alt="Type Mismatch?" />
</section>
<section id="standard-functions">
<h2>Standard Functions</h2>
<p>
Nothing here...you're on your own :-)
</p>
</section>
<section id="transformers">
<h2>Transformers</h2>
<ol>
<li>Tokenizer</li>
<li>HashingTF</li>
<li>VectorAssembler</li>
<li>OneHotEncoder</li>
<li>StringIndexer</li>
</ol>
</section>
<section>
<section id="tooling">
<h2>Tooling - Git & GitHub & Source Code</h2>
<ol>
<li>Very impressed by the variety of tools</li>
<li>GitHub</li>
<li>GitHub Pages for website</li>
<li>Databricks Cloud</li>
</ol>
</section>
<section>
<h2>Resolution</h2>
<p>
I did learn a few things from YOU! Thanks!
</p>
<a href="https://twitter.com/jaceklaskowski/status/775003635835035649">
<img style="border: 0" src="images/hackondata-twitter-databrickscloud.png" alt="Tweet on Databricks Cloud" />
</a>
</section>
</section>
<section id="questions" style="text-align: left">
<h1>Questions?</h1>
<p>
<ul>
<li>Read <a href="https://bit.ly/mastering-apache-spark">Mastering Apache Spark 2</a>
<ul>
<li>https://bit.ly/mastering-apache-spark</li>
</ul>
</li>
<li>Follow <a href="https://twitter.com/jaceklaskowski">@jaceklaskowski</a> on twitter</li>
<li>Review <a href="http://stackoverflow.com/users/1305344/jacek-laskowski">my questions and answers on StackOverflow</a></li>
<li>Use <a href="https://github.com/jaceklaskowski">Jacek's code at GitHub</a></li>
<li>Read <a href="https://medium.com/@jaceklaskowski">Jacek Laskowski @ Medium</a></li>
<li>Visit <a href="https://blog.jaceklaskowski.pl">Jacek Laskowski's blog</a></li>
</ul>
</p>
</section>
</div>
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