The document discusses energy analytics and the use of Apache Spark for large-scale data processing in the energy sector, focusing on customer segmentation and load forecasting use cases. It outlines the capabilities of Spark, highlighting its speed, ease of use, and integration with various data sources. The material also provides setup instructions for using Spark and discusses relevant algorithms such as k-means for clustering and regression for forecasting.

1. Energy Analytics
with Spark
SRI KRISHNAMURTHY
QUANTUNIVERSITY LLC.
QUANTUNIVERSITY@GMAIL.COM
2015 Copyright QuantUniversity LLC.

2. - ADVISORY SERVICES
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SOON ANALYTICS CERTIFICATE PROGRAM!

3. • Founder of QuantUniversity LLC. and
www.analyticscertificate.com
• Advisory and Consultancy for Analytics
• Prior Experience at MathWorks, Citigroup and
Endeca and 25+ financial services customers
• Regular Columnist for the Wilmott Magazine
• Author of forthcoming book
“Financial Modeling: A case study approach”
published by Wiley
• Charted Financial Analyst and Certified Analytics
Professional
• Teaches Analytics in the Babson College MBA
program and at Northeastern University
Sri Krishnamurthy
Founder and CEO
SPEAKERBIO

4. Agenda
1. Energy Analytics 101
2. A quick introduction to Apache Spark
3. Fundamentals and setup
4. Energy Analytics use-cases
Files for today’s workshop
http://bit.ly/1F6E91O

5. What’s missing in this picture ?
Analytics of the 1990s

6. Actionable analytics enables engagement!
1. What if energy companies can understand
customer’s usage better?
2. What if energy companies can understand
what drives customer energy usage ?
3. What if energy companies engage with
customers by providing actionable
analytics so that customers can monitor
and plan for wide swings in energy usage?

7. Customer demand isn’t uniform
What changed from Jan 2nd to Jan 3rd ?
Does this customer heavily use energy from 11-9pm ?

8. Problem
1. Lots of data
2. Utilities can have more than 100K customers.
3. Truly a big data problem with multiple dimensions and dirty data

9. Use case 1 : Customer Segmentation
Segmenting customers
- How can we segment customers into groups ?
- Typically Clustering algorithms like K-means are used
What is K-means ?
http://shabal.in/visuals/kmeans/2.html

10. Use-case 2 – Load Forecasting
Given parameters like Temperature, day of week, month, time of day, can we predict load ?
Typically methods like Regression are used
Load = Function of (Temperature, day of week, month, time of day etc)

11. What is Spark ?
Apache Spark™ is a fast and general engine for large-scale data processing.
Came out of U.C. Berkeley’s AMP Lab
Lightning-fast cluster computing

12. Why Spark ?
Speed
Run programs up to 100x faster than Hadoop MapReduce
in memory, or 10x faster on disk.
Spark has an advanced DAG execution engine that
supports cyclic data flow and in-memory computing.

13. Why Spark ?
text_file = spark.textFile("hdfs://...")
text_file.flatMap(lambda line: line.split())
.map(lambda word: (word, 1))
.reduceByKey(lambda a, b: a+b)
Word count in Spark's Python API
Ease of Use
• Write applications quickly in Java, Scala or
Python,R.
• Spark offers over 80 high-level operators that
make it easy to build parallel apps. And you can
use it interactively from the Scala and Python
shells.
• R support recently added

14. Why Spark ?
Generality
Combine SQL, streaming, and complex
analytics.
Spark powers a stack of high-level tools
including:
1. Spark Streaming: processing real-time data
streams
2. Spark SQL and DataFrames: support for
structured data and relational queries
3. MLlib: built-in machine learning library
4. GraphX: Spark’s new API for graph
processing

15. Why Spark?
Runs Everywhere
Spark runs on Hadoop, Mesos,
standalone, or in the cloud. It can access
diverse data sources including HDFS,
Cassandra, HBase, and S3.
You can run Spark using its standalone
cluster mode, on EC2, on Hadoop YARN,
or on Apache Mesos. Access data
in HDFS, Cassandra, HBase, Hive,Tachyo
n, and any Hadoop data source.

16. Key Features of Spark
• handles batch, interactive, and real-time within a single
framework
• native integration with Java, Python, Scala, R
• programming at a higher level of abstraction
• more general: map/reduce is just one set of supported
constructs

17. Secret Sauce : RDD, Transformation,
Action

18. How does it work?
Resilient Distributed Datasets (RDD) are the primary abstraction in Spark – a
fault-tolerant collection of elements that can be operated on in parallel
Transformations create a new dataset from an existing one. All transformations
in Spark are lazy: they do not compute their results right away – instead they
remember the transformations applied to some base dataset
Actions return a value to the driver program after running a computation on the
dataset

19. How is Spark different?
Map – Reduce : Hadoop

20. Problems with this MR model
Difficult to code

21. Quick Demo
Test_Notebook.ipyb

22. Spark Setup
1. Get Spark 1.5 from http://spark.apache.org/
Select the latest Spark release (1.5), a prebuilt package for Hadoop 2.6, and download directly.
Windows
TEST_SPARK_ENV = C:spark-1.5.0-bin-hadoop2.6
SPARK_HOME = % TEST_SPARK_ENV%
Add % TEST_SPARK_ENV%bin to path
Unix/MAC
export SPARK_HOME=/srv/spark
export PATH=$SPARK_HOME/bin:$PATH

23. Set up Ipython Notebook
Install the latest Anaconda install from https://store.continuum.io/cshop/anaconda/
ipython profile create spark1.5.0
Go to:
C:Userssri-dell.ipythonprofile_spark1.5.0startup and create a file:
00-spark1.5.0-setup.py

24. Add this

25. Start Ipython Notebook (Jupyter)
cd c:spark_workshop
ipython notebook --profile=spark1.5.0
Example 1
Test_Notebook.ipyb

26. Appendix
In Windows, you may see this:
See https://issues.apache.org/jira/browse/SPARK-2356

27. To resolve this:
Get winutils.exe from http://public-repo-1.hortonworks.com/hdp-win-alpha/winutils.exe and
put it in SPARK_HOME
Add the following environment variables
set HADOOP_HOME=%SPARK_HOME%
set HADOOP_CONF_DIR=%SPARK_HOME%

28. To reduce logging messages
Copy
%SPARK_HOME%/conf/log4j.properties.template
to
%SPARK_HOME%/conf/log4j.properties
Replace INFO to WARN

29. Key Features used in Spark
1. Dataframes
◦ http://spark.apache.org/docs/latest/sql-programming-guide.html
2. Pyspark.ml API
◦ http://spark.apache.org/docs/latest/api/python/index.html

30. Use case 1 : Customer Segmentation
Segmenting customers
- How can we segment customers into groups ?
- Typically Clustering algorithms like K-means are used
What is K-means ?
http://shabal.in/visuals/kmeans/2.html

31. K-means
Given a set of observations (x1, x2, …, xn), where each
observation is a d-dimensional real vector, k-means clustering
aims to partition the n observations into k (≤ n)
sets S = {S1, S2, …, Sk} so as to minimize the within-cluster sum of
squares (WCSS). In other words, its objective is to find:
where μi is the mean of points in Si.

32. Data Wrangling
and Exploration
Clustering
Plotting for
Exploration
Clustering approach

33. Demo
Data
http://en.openei.org/datasets/dataset?tags=Residential
http://en.openei.org/datasets/dataset/doe-buildings-performance-database-sample-
residential-data
Goal : To segment customers to 3-5 segments based on similarity
K-means - Customer segmentation.ipynb

34. Use-case 2 – Load Forecasting
Given parameters like Temperature, day of week, month, time of day, can we predict load ?
Typically methods like Regression are used
Load = Function of (Temperature, day of week, month, time of day etc)

35. Ordinary Least Squares Regression

36. Machine Learning Model
Piecewise Linear Model
50 different factors to use
Like temperature, holidays
Weekday/weekend etc

37. Data Wrangling
and Exploration
Machine Learning
for forecasting
Plotting for
Exploration
Linear Regression

38. 248 unique customers
30 million records
5 minute intervals
35 different subindustries
US, Canada and Australia
Data Sources
Temperature data for more than 100 weather stations corresponding
To the sites

39. Enernoc dataset
248 unique customers
30 million records
5 minute intervals
35 different subindustries
US, Canada and Australia

40. Demo
Data
Forecast.csv
Goal : To build a Linear Regression model to enable load forecasts given day,hour,month and
temperature
Load Forecasting-Dataframe.ipyb

41. Other Energy sources
Utilities
http://www.sdge.com/documents/green-button-60-min-meter-interval-sample-data-csv
http://www.sdge.com/customer-service/green-button/additional-information-developers-and-
third-parties

44. References
1. Spark documentation and http://spark.apache.org/
2. Spark presentations primarily by Spark founders and the Databricks team

45. Thank you!
Sri Krishnamurthy, CFA, CAP
Founder and CEO
QuantUniversity LLC.
srikrishnamurthy
www.QuantUniversity.com
www.analyticscertificate.com
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