Big data made easy with a Spark
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This document provides an agenda and slides for a presentation on introducing big data concepts using open source tools. The presentation covers ingesting and analyzing sample data using Spark SQL, including joining datasets to count the number of books by author. It also demonstrates basic machine learning by loading sample revenue data, applying data quality rules to correct anomalies, and using linear regression to predict revenue for a party of 40 guests. The goal is to make big data concepts accessible to audiences of all experience levels.
![Jean Georges Perrin
Software since 1983
Big Data since 1984
x11
@jgperrin • http://jgp.net [blog]](https://image.slidesharecdn.com/190418bigdatamadeeasywithaspark001-190501170638/85/Big-data-made-easy-with-a-Spark-2-320.jpg)
![package net.jgp.books.sparkWithJava.ch01;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
public class CsvToDataframeApp {
public static void main(String[] args) {
CsvToDataframeApp app = new CsvToDataframeApp();
app.start();
}
private void start() {
// Creates a session on a local master
SparkSession spark = SparkSession.builder()
.appName("CSV to Dataset")
.master("local")
.getOrCreate();
// Reads a CSV file with header, called books.csv, stores it in a dataframe
Dataset<Row> df = spark.read().format("csv")
.option("header", "true")
.load("data/books.csv");
// Shows at most 5 rows from the dataframe
df.show(5);
}
}
/jgperrin/net.jgp.books.sparkWithJava.ch01](https://image.slidesharecdn.com/190418bigdatamadeeasywithaspark001-190501170638/85/Big-data-made-easy-with-a-Spark-27-320.jpg)
![package net.jgp.labs.spark.l200_join.l030_count_books;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
public class AuthorsAndBooksCountBooksApp {
public static void main(String[] args) {
AuthorsAndBooksCountBooksApp app = new AuthorsAndBooksCountBooksApp();
app.start();
}
private void start() {
SparkSession spark = SparkSession.builder()
.appName("Authors and Books")
.master("local").getOrCreate();
String filename = "data/authors.csv";
Dataset<Row> authorsDf = spark.read()
.format("csv")
.option("inferSchema", "true")
.option("header", "true")
.load(filename);
/jgperrin/net.jgp.labs.spark](https://image.slidesharecdn.com/190418bigdatamadeeasywithaspark001-190501170638/85/Big-data-made-easy-with-a-Spark-38-320.jpg)
![Load & Format
+-----+-----+
|guest|price|
+-----+-----+
| 1| 23.1|
| 2| 30.0|
…
+-----+-----+
only showing top 20 rows
----
1st DQ rule
+-----+-----+------------+
|guest|price|price_no_min|
+-----+-----+------------+
| 1| 23.1| 23.1|
| 2| 30.0| 30.0|
…
| 25| 3.0| -1.0|
| 26| 10.0| -1.0|
…
+-----+-----+------------+
…
+-----+-----+-----+--------+
|guest|price|label|features|
+-----+-----+-----+--------+
| 1| 23.1| 23.1| [1.0]|
| 2| 30.0| 30.0| [2.0]|
…
+-----+-----+-----+--------+
only showing top 20 rows
…
RMSE: 2.802192495300457
r2: 0.9965340953376102
Intersection: 20.979190460591575
Regression parameter: 1.0
Tol: 1.0E-6
Prediction for 40.0 guests is 218.00351106373822](https://image.slidesharecdn.com/190418bigdatamadeeasywithaspark001-190501170638/85/Big-data-made-easy-with-a-Spark-56-320.jpg)
![+-----+-----+-----+--------+------------------+
|guest|price|label|features| prediction|
+-----+-----+-----+--------+------------------+
| 1| 23.1| 23.1| [1.0]|24.563807596513133|
| 2| 30.0| 30.0| [2.0]|29.595283312577884|
| 2| 33.0| 33.0| [2.0]|29.595283312577884|
| 3| 34.0| 34.0| [3.0]| 34.62675902864264|
| 3| 30.0| 30.0| [3.0]| 34.62675902864264|
| 3| 38.0| 38.0| [3.0]| 34.62675902864264|
| 4| 40.0| 40.0| [4.0]| 39.65823474470739|
| 14| 89.0| 89.0| [14.0]| 89.97299190535493|
| 16|102.0|102.0| [16.0]|100.03594333748444|
| 20|120.0|120.0| [20.0]|120.16184620174346|
| 22|131.0|131.0| [22.0]|130.22479763387295|
| 24|142.0|142.0| [24.0]|140.28774906600245|
+-----+-----+-----+--------+------------------+
Prediction for 40.0 guests is 220.79136052303852
Prediction for 40 guests](https://image.slidesharecdn.com/190418bigdatamadeeasywithaspark001-190501170638/85/Big-data-made-easy-with-a-Spark-67-320.jpg)
Big data made easy with a Spark
- 1. Big Data made easy with a Open Source 101 Columbia, SC April 18th 2019
- 2. Jean Georges Perrin Software since 1983 Big Data since 1984 x11 @jgperrin • http://jgp.net [blog]
- 3. News… ๏ Director of Engineering for WeExperience ๏ Hiring a team of talented engineers to work with us ๏ Front end ๏ Mobile ๏ Back end & data ๏ AI ๏ Shoot at @jgperrin
- 5. Caution Hands-on tutorial Tons of content Unknown crowd Unknown setting
- 6. Get all the S T U F F ๏ Go to http://jgp.net/ato2018 ๏ Install the software ๏ Access the source code
- 7. Who are thou? ๏ Experience with Spark? ๏ Experience with Hadoop? ๏ Experience with Scala? ๏ Java? ๏ PHP guru? ๏ Front-end developer?
- 8. But most importantly… ๏ … who is not a developer?
- 9. ๏ What is Big Data? ๏ What is. ? ๏ What can I do with. ? ๏ What is a app, anyway? ๏ Install a bunch of software ๏ A first example ๏ Understand what just happened ๏ Another example, slightly more complex, because you are now ready ๏ But now, sincerely what just happened? ๏ Let’s do AI! ๏ Going further Agenda
- 10. 3 V4 5 Biiiiiiiig Data ๏ volume ๏ variety ๏ velocity ๏ variability ๏ value Sources: https://en.wikipedia.org/wiki/Big_data, https://www.ibm.com/blogs/watson-health/the-5-vs-of-big-data
- 11. Data is considered big when they need more than one computer to be processed Sources: https://en.wikipedia.org/wiki/Big_data, https://www.ibm.com/blogs/watson-health/the-5-vs-of-big-data
- 12. Title TextAnalytics operating system
- 13. Apps Analytics Distrib. An analytics operating system? Hardware OS Apps HardwareHardware OS OS Distributed OS Analytics OS Apps HardwareHardware OS OS
- 14. An analytics operating system? HardwareHardware OS OS Distributed OS Analytics OS Apps {
- 15. An analytics operating system? HardwareHardware OS OS Distributed OS Analytics OS Apps {
- 16. Some use cases ๏ NCEatery.com ๏ Restaurant analytics ๏ 1.57×10^21 datapoints analyzed ๏ Lumeris ๏ General compute ๏ Distributed data transfer/pipeline ๏ CERN ๏ Analysis of the science experiments in the LHC - Large Hadron Collider ๏ IBM ๏ Watson Data Studio ๏ Event Store - http://jgp.net/2017/06/22/spark-boosts-ibm-event-store/ ๏ And much more…
- 17. What a typical app looks like? Connect to the cluster Load Data Do something with the data Share the results
- 20. Get all the S T U F F ๏ Go to http://jgp.net/ato2018 ๏ Install the software ๏ Access the source code
- 21. Download some tools ๏ Java JDK 1.8 ๏ http://bit.ly/javadk8 ๏ Eclipse Oxygen or later ๏ http://bit.ly/eclipseo2 ๏ Other nice to have ๏ Maven ๏ SourceTree or git (command line) http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html http://www.eclipse.org/downloads/eclipse-packages/
- 22. Aren’t you glad we are using Java?
- 23. Lab #1 - ingestion
- 24. Lab #1 - ingestion ๏ Goal In a Big Data project, ingestion is the first operation. You get the data “in.” ๏ Source code https://github.com/jgperrin/ net.jgp.books.spark.ch01
- 25. Getting deeper ๏ Go to net.jgp.books.spark.ch01 ๏ Open CsvToDataframeApp.java ๏ Right click, Run As, Java Application
- 26. +---+--------+--------------------+-----------+--------------------+ | id|authorId| title|releaseDate| link| +---+--------+--------------------+-----------+--------------------+ | 1| 1|Fantastic Beasts ...| 11/18/16|http://amzn.to/2k...| | 2| 1|Harry Potter and ...| 10/6/15|http://amzn.to/2l...| | 3| 1|The Tales of Beed...| 12/4/08|http://amzn.to/2k...| | 4| 1|Harry Potter and ...| 10/4/16|http://amzn.to/2k...| | 5| 2|Informix 12.10 on...| 4/23/17|http://amzn.to/2i...| +---+--------+--------------------+-----------+--------------------+ only showing top 5 rows
- 27. package net.jgp.books.sparkWithJava.ch01; import org.apache.spark.sql.Dataset; import org.apache.spark.sql.Row; import org.apache.spark.sql.SparkSession; public class CsvToDataframeApp { public static void main(String[] args) { CsvToDataframeApp app = new CsvToDataframeApp(); app.start(); } private void start() { // Creates a session on a local master SparkSession spark = SparkSession.builder() .appName("CSV to Dataset") .master("local") .getOrCreate(); // Reads a CSV file with header, called books.csv, stores it in a dataframe Dataset<Row> df = spark.read().format("csv") .option("header", "true") .load("data/books.csv"); // Shows at most 5 rows from the dataframe df.show(5); } } /jgperrin/net.jgp.books.sparkWithJava.ch01
- 28. So what happened? Let’s try to understand a little more
- 30. Node 1 - OS Node 2 - OS Node 3 - OS Node 4 - OS Node 1 - HW Node 2 - HW Node 3 - HW Node 4 - HW Spark SQL Spark streaming Machine learning & deep learning & artificial intelligence GraphX Node 5 - OS Node 5 - HW Your application … … Unified API Node 6 - OS Node 6 - HW Node 7 - OS Node 7 - HW Node 8 - OS Node 8 - HW
- 31. Spark SQL Spark streaming Machine learning & deep learning & artificial intelligence GraphX Your application Dataframe Node 1 - OS Node 2 - OS Node 3 - OS Node 4 - OS Node 5 - OS … Node 6 - OS Node 7 - OS Node 8 - OS Unified API
- 32. Title Text Spark SQL Spark streaming Machine learning & deep learning & artificial intelligence GraphX Dataframe
- 33. Lab #2 - a bit of analytics But really just a bit
- 34. Lab #2 - a little bit of analytics ๏ Goal From two datasets, one containing books, the other authors, list the authors with most books, by number of books ๏ Source code https://github.com/jgperrin/net.jgp.labs.spark
- 35. If it was in a relational database books.csv authors.csv id: integer name: string link: string wikipedia: string id: integer authorId: integer title: string releaseDate: string link: string
- 36. Basic analytics ๏ Go to net.jgp.labs.spark.l200_join.l030_count_books ๏ Open AuthorsAndBooksCountBooksApp.java ๏ Right click, Run As, Java Application
- 37. +---+-------------------+--------------------+-----+ | id| name| link|count| +---+-------------------+--------------------+-----+ | 1| J. K. Rowling|http://amzn.to/2l...| 4| | 12|William Shakespeare|http://amzn.to/2j...| 3| | 4| Denis Diderot|http://amzn.to/2i...| 2| | 6| Craig Walls|http://amzn.to/2A...| 2| | 2|Jean Georges Perrin|http://amzn.to/2w...| 2| | 3| Mark Twain|http://amzn.to/2v...| 2| | 11| Alan Mycroft|http://amzn.to/2A...| 1| | 10| Mario Fusco|http://amzn.to/2A...| 1| … +---+-------------------+--------------------+-----+ root |-- id: integer (nullable = true) |-- name: string (nullable = true) |-- link: string (nullable = true) |-- count: long (nullable = false)
- 38. package net.jgp.labs.spark.l200_join.l030_count_books; import org.apache.spark.sql.Dataset; import org.apache.spark.sql.Row; import org.apache.spark.sql.SparkSession; public class AuthorsAndBooksCountBooksApp { public static void main(String[] args) { AuthorsAndBooksCountBooksApp app = new AuthorsAndBooksCountBooksApp(); app.start(); } private void start() { SparkSession spark = SparkSession.builder() .appName("Authors and Books") .master("local").getOrCreate(); String filename = "data/authors.csv"; Dataset<Row> authorsDf = spark.read() .format("csv") .option("inferSchema", "true") .option("header", "true") .load(filename); /jgperrin/net.jgp.labs.spark
- 39. filename = "data/books.csv"; Dataset<Row> booksDf = spark.read() .format("csv") .option("inferSchema", "true") .option("header", "true") .load(filename); Dataset<Row> libraryDf = authorsDf .join( booksDf, authorsDf.col("id").equalTo(booksDf.col("authorId")), "left") .withColumn("bookId", booksDf.col("id")) .drop(booksDf.col("id")) .groupBy( authorsDf.col("id"), authorsDf.col("name"), authorsDf.col("link")) .count(); libraryDf = libraryDf .orderBy(libraryDf.col("count").desc()); libraryDf.show(); libraryDf.printSchema(); } } /jgperrin/net.jgp.labs.spark
- 40. The art of delegating
- 41. Slave (Worker) Driver Master Cluster Manager Slave (Worker) Your app Executor Task Task Executor Task Task
- 42. Lab #3 - an even smaller bit of AI But really just a bit
- 44. Popular beliefs ๏ Robot with human-like behavior ๏ HAL from 2001 ๏ Isaac Asimov ๏ Potential ethic problems General AI Narrow AI ๏ Lots of mathematics ๏ Heavy calculations ๏ Algorithms ๏ Self-driving cars Current state-of-the-art
- 45. Title Text I am an expert in general AI ARTIFICIAL INTELLIGENCE is Machine Learning
- 46. ๏ Common algorithms ๏Linear and logistic regressions ๏Classification and regression trees ๏K-nearest neighbors (KNN) ๏Deep learning ๏Subset of ML ๏Artificial neural networks (ANNs) ๏Super CPU intensive, use of GPU Machine learning
- 47. There are two kinds of data scientists: 1) Those who can extrapolate from incomplete data.
- 48. Title TextDATA Engineer DATA Scientist Adapted from: https://www.datacamp.com/community/blog/data-scientist-vs-data-engineer Develop, build, test, and operationalize datastores and large-scale processing systems. DataOps is the new DevOps. Clean, massage, and organize data. Perform statistics and analysis to develop insights, build models, and search for innovative correlations. Match architecture with business needs. Develop processes for data modeling, mining, and pipelines. Improve data reliability and quality. Prepare data for predictive models. Explore data to find hidden gems and patterns. Tells stories to key stakeholders.
- 49. Title Text Adapted from: https://www.datacamp.com/community/blog/data-scientist-vs-data-engineer DATA Engineer DATA Scientist SQL
- 50. All over again As goes the old adage: Garbage In, Garbage Out xkcd
- 51. Lab #3 - correcting and extrapolating data
- 52. Lab #3 - projecting data ๏ Goal As a restaurant manager, I want to predict how much revenue will bring a party of 40 ๏ Source code https://github.com/jgperrin/net.jgp.labs.sparkdq4ml
- 53. If everything was as simple… Dinner revenue per number of guests
- 54. …as a visual representation Anomaly #1 Anomaly #2
- 55. I love it when a plan comes together
- 56. Load & Format +-----+-----+ |guest|price| +-----+-----+ | 1| 23.1| | 2| 30.0| … +-----+-----+ only showing top 20 rows ---- 1st DQ rule +-----+-----+------------+ |guest|price|price_no_min| +-----+-----+------------+ | 1| 23.1| 23.1| | 2| 30.0| 30.0| … | 25| 3.0| -1.0| | 26| 10.0| -1.0| … +-----+-----+------------+ … +-----+-----+-----+--------+ |guest|price|label|features| +-----+-----+-----+--------+ | 1| 23.1| 23.1| [1.0]| | 2| 30.0| 30.0| [2.0]| … +-----+-----+-----+--------+ only showing top 20 rows … RMSE: 2.802192495300457 r2: 0.9965340953376102 Intersection: 20.979190460591575 Regression parameter: 1.0 Tol: 1.0E-6 Prediction for 40.0 guests is 218.00351106373822
- 57. Using existing data quality rules package net.jgp.labs.sparkdq4ml.dq.udf; import org.apache.spark.sql.api.java.UDF1; import net.jgp.labs.sparkdq4ml.dq.service.*; public class MinimumPriceDataQualityUdf implements UDF1< Double, Double > { public Double call(Double price) throws Exception { return MinimumPriceDataQualityService.checkMinimumPrice(price); } } /jgperrin/net.jgp.labs.sparkdq4ml If price is ok, returns price, if price is ko, returns -1
- 58. Telling Spark to use my DQ rules SparkSession spark = SparkSession.builder() .appName("DQ4ML").master("local").getOrCreate(); spark.udf().register( "minimumPriceRule", new MinimumPriceDataQualityUdf(), DataTypes.DoubleType); spark.udf().register( "priceCorrelationRule", new PriceCorrelationDataQualityUdf(), DataTypes.DoubleType); /jgperrin/net.jgp.labs.sparkdq4ml
- 59. Loading my dataset String filename = "data/dataset.csv"; Dataset<Row> df = spark.read().format("csv") .option("inferSchema", "true").option("header", "false") .load(filename); df = df.withColumn("guest", df.col("_c0")).drop("_c0"); df = df.withColumn("price", df.col("_c1")).drop("_c1"); df = df.withColumn( "price_no_min", callUDF("minimumPriceRule", df.col("price"))); df.createOrReplaceTempView("price"); df = spark.sql("SELECT guest, price_no_min AS price FROM price WHERE price_no_min > 0"); Using CSV, but could be Hive, JDBC, name it… /jgperrin/net.jgp.labs.sparkdq4ml
- 60. +-----+-----+ |guest|price| +-----+-----+ | 1|23.24| | 2|30.89| | 2|33.74| | 3|34.89| | 3|29.91| | 3| 38.0| | 4| 40.0| | 5|120.0| | 6| 50.0| | 6|112.0| | 8| 60.0| | 8|127.0| | 8|120.0| | 9|130.0| +-----+-----+ Raw data, contains the anomalies
- 61. Apply the rules String filename = "data/dataset.csv"; Dataset<Row> df = spark.read().format("csv") .option("inferSchema", "true").option("header", "false") .load(filename); df = df.withColumn("guest", df.col("_c0")).drop("_c0"); df = df.withColumn("price", df.col("_c1")).drop("_c1"); df = df.withColumn( "price_no_min", callUDF("minimumPriceRule", df.col("price"))); df.createOrReplaceTempView("price"); df = spark.sql("SELECT guest, price_no_min AS price FROM price WHERE price_no_min > 0"); /jgperrin/net.jgp.labs.sparkdq4ml
- 62. +-----+-----+------------+ |guest|price|price_no_min| +-----+-----+------------+ | 1| 23.1| 23.1| | 2| 30.0| 30.0| | 2| 33.0| 33.0| | 3| 34.0| 34.0| | 24|142.0| 142.0| | 24|138.0| 138.0| | 25| 3.0| -1.0| | 26| 10.0| -1.0| | 25| 15.0| -1.0| | 26| 4.0| -1.0| | 28| 10.0| -1.0| | 28|158.0| 158.0| | 30|170.0| 170.0| | 31|180.0| 180.0| +-----+-----+------------+ Anomalies are clearly identified by -1, so they can be easily filtered
- 63. Filtering out anomalies String filename = "data/dataset.csv"; Dataset<Row> df = spark.read().format("csv") .option("inferSchema", "true").option("header", "false") .load(filename); df = df.withColumn("guest", df.col("_c0")).drop("_c0"); df = df.withColumn("price", df.col("_c1")).drop("_c1"); df = df.withColumn( "price_no_min", callUDF("minimumPriceRule", df.col("price"))); df.createOrReplaceTempView("price"); df = spark.sql("SELECT guest, price_no_min AS price FROM price WHERE price_no_min > 0"); /jgperrin/net.jgp.labs.sparkdq4ml
- 64. +-----+-----+ |guest|price| +-----+-----+ | 1| 23.1| | 2| 30.0| | 2| 33.0| | 3| 34.0| | 3| 30.0| | 4| 40.0| | 19|110.0| | 20|120.0| | 22|131.0| | 24|142.0| | 24|138.0| | 28|158.0| | 30|170.0| | 31|180.0| +-----+-----+ Useable data
- 65. Format the data for ML ๏ Convert/Adapt dataset to Features and Label ๏ Required for Linear Regression in MLlib ๏Needs a column called label of type double ๏Needs a column called features of type VectorUDT
- 66. Format the data for ML spark.udf().register( "vectorBuilder", new VectorBuilder(), new VectorUDT()); df = df.withColumn("label", df.col("price")); df = df.withColumn("features", callUDF("vectorBuilder", df.col("guest"))); // ... Lots of complex ML code goes here ... double p = model.predict(features); System.out.println("Prediction for " + feature + " guests is " + p); /jgperrin/net.jgp.labs.sparkdq4ml
- 67. +-----+-----+-----+--------+------------------+ |guest|price|label|features| prediction| +-----+-----+-----+--------+------------------+ | 1| 23.1| 23.1| [1.0]|24.563807596513133| | 2| 30.0| 30.0| [2.0]|29.595283312577884| | 2| 33.0| 33.0| [2.0]|29.595283312577884| | 3| 34.0| 34.0| [3.0]| 34.62675902864264| | 3| 30.0| 30.0| [3.0]| 34.62675902864264| | 3| 38.0| 38.0| [3.0]| 34.62675902864264| | 4| 40.0| 40.0| [4.0]| 39.65823474470739| | 14| 89.0| 89.0| [14.0]| 89.97299190535493| | 16|102.0|102.0| [16.0]|100.03594333748444| | 20|120.0|120.0| [20.0]|120.16184620174346| | 22|131.0|131.0| [22.0]|130.22479763387295| | 24|142.0|142.0| [24.0]|140.28774906600245| +-----+-----+-----+--------+------------------+ Prediction for 40.0 guests is 220.79136052303852 Prediction for 40 guests
- 68. (the complex ML code) LinearRegression lr = new LinearRegression() .setMaxIter(40) .setRegParam(1) .setElasticNetParam(1); LinearRegressionModel model = lr.fit(df); Double feature = 40.0; Vector features = Vectors.dense(40.0); double p = model.predict(features); /jgperrin/net.jgp.labs.sparkdq4ml Define algorithms and its (hyper)parameters Created a model from our data Apply the model to a new dataset: predict
- 69. It’s all about the base model Same model Trainer ModelDataset #1 ModelDataset #2 Predicted Data Step 1: Learning phase Step 2..n: Predictive phase
- 70. Conclusion
- 71. A (Big) Data Scenario Data Raw Data Ingestion DataQuality Pure Data Transformation Rich Data Load/Publish Data
- 72. Key takeaways ๏ Big Data is easier than one could think ๏ Java is the way to go (or Python) ๏ New vocabulary for using Spark ๏ You have a friend to help (ok, me) ๏ Spark is fun ๏ Spark is easily extensible
- 73. Going further ๏ Contact me @jgperrin ๏ Join the Spark User mailing list ๏ Get help from Stack Overflow ๏ fb.com/TriangleSpark ๏ Start a Spark meetup in Columbia, SC?
- 74. Going further Spark in action (Second edition, MEAP) by Jean Georges Perrin published by Manning http://jgp.net/sia sprkans-681D sprkans-7538 ctwopen10119 40% off One two free books
- 75. Thanks @jgperrin
- 76. Backup
- 77. Spark in Action Second edition, MEAP by Jean Georges Perrin published by Manning http://jgp.net/sia
- 78. Credits Photos by Pexels IBM PC XT by Ruben de Rijcke - http://dendmedia.com/ vintage/ - Own work, CC BY 3.0, https:// commons.wikimedia.org/w/index.php?curid=3610862 Illustrations © Jean Georges Perrin
- 79. No more slides You’re on your own!