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![All rights reserved, © 2015 ICM UW
Example: versatile yet seamless
1. Select positions from historic tweets.
2. Train a model of 10 clusters of neighbouring nodes.
3. Classify real–time tweets from last 20 sec. every 3 sec. and count them for each
cluster.
10
points = sc.runSql[Double, Double]("SELECT latitude, longitude FROM historic_tweets")
model = KMeans.train(points, 10)
sc.twitterStream(...)
.map(lambda t: (model.closestCenter(t.location), 1))
.reduceByKeyAndWindow(lambda x,y: x+y , Seconds(20), Seconds(3))
Source: The State of Spark, and Where We’re Going Next, presentation by M. Zaharia, 2013](https://image.slidesharecdn.com/20151013dswassimpleasapachespark3-151015015354-lva1-app6892/85/As-simple-as-Apache-Spark-10-320.jpg)
![All rights reserved, © 2015 ICM UW
Third: Code much and often
14
import pyspark.ml.recommendation.ALS
import pyspark.ml.recommendation.Rating
// Transform Strings: "user_id,movie_id,rating" to Ratings: Rating(user_id:Int,movie_id:Int,rating:Double)
data = sc.textFile("path/to/data.csv")
ratings = data.map(lambda s: s.split(',')).map(lambda arr: Rating(int(arr[0]), int(arr[1]), float(arr[2]))
// Build the recommendation model using ALS
// Factor the rating matrix A=[n,m] into B=[n,f] and C=[f,m], where A ~= B x C
numFeatures = 10; numIterations = 20
model = ALS.train(ratings, numFeatures, numIterations, 0.01)](https://image.slidesharecdn.com/20151013dswassimpleasapachespark3-151015015354-lva1-app6892/85/As-simple-as-Apache-Spark-14-320.jpg)
Uploaded byData Science Warsaw
As simple as Apache Spark
The document discusses Apache Spark and its ecosystem. It begins with introducing the speaker who has 5 years of experience in knowledge discovery and has used big data technologies like Hadoop and Spark. It then explains that Spark provides a versatile ecosystem for batch, streaming, SQL, machine learning and graph processing workloads through components like Spark Core, Spark SQL, Spark Streaming, MLLib and GraphX. The document demonstrates Spark's seamless integration through an example that performs SQL queries, trains a machine learning model and performs streaming analysis in one workflow. It encourages attendees to start using Spark by downloading it and experimenting through hands-on coding examples.
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Similar to As simple as Apache Spark
As simple as Apache Spark
- 1. Data Science Warsaw,2015.10.13 As simple as Apache Spark
- 2. Data Science Warsaw,2015.10.13 About me ● At ICM since 5 years ● Knowledge Discovery in Documents ○ Object disambiguation, Document classification, Document similarity, etc., etc. ● Enough big to use Big Data ecosystems ○ Hadoop since 2012 ○ Spark since 2013 (2014 for real) 2
- 3. Data Science Warsaw,2015.10.13 We have still about 19 minutes...
- 4. Data Science Warsaw,2015.10.13 Obligatory word count example ■ Task: to count the number of occurrences of each word in a text ■ Frequently used when introducing the MapReduce paradigm 4 Tell me you’ve already know it!
- 5. All rights reserved,© 2015 ICM UW 5 Hadoop has a rich set of libraries Map-Reduce — good for batch Pig — Scripts Oozie — Workflows Mahout — Machine Learning Hive — SQL Queries Impala — Ad-hoc Queries Storm — Real Time Streaming Giraph — Graphs
- 6. All rights reserved,© 2015 ICM UW 6 Hadoop ecosystem is (too) large Map-Reduce — good for batch ■ Using multiple libraries results in ● long deployment, costful support, burden of administering number of configuration files ● lots of glueing code between libraries Pig — Scripts Oozie — Workflows Mahout — Machine Learning Hive — SQL Queries Impala — Ad-hoc Queries Storm — Real Time Streaming Giraph — Graphs
- 7. All rights reserved,© 2015 ICM UW Let’s walk into Big Data like a Boss with .
- 8. All rights reserved,© 2015 ICM UW Spark ecosystem is versatile yet seamless Ecosystem of high-level tools for various use-cases 8 Spark Core Spark SQL Spark Streaming near real-time MLLib machine learning GraphX graph processing SparkR R on Spark
- 9. All rights reserved,© 2015 ICM UW Spark ecosystem is versatile yet seamless 9 „One to rule them all"
- 10. All rights reserved,© 2015 ICM UW Example: versatile yet seamless 1. Select positions from historic tweets. 2. Train a model of 10 clusters of neighbouring nodes. 3. Classify real–time tweets from last 20 sec. every 3 sec. and count them for each cluster. 10 points = sc.runSql[Double, Double]("SELECT latitude, longitude FROM historic_tweets") model = KMeans.train(points, 10) sc.twitterStream(...) .map(lambda t: (model.closestCenter(t.location), 1)) .reduceByKeyAndWindow(lambda x,y: x+y , Seconds(20), Seconds(3)) Source: The State of Spark, and Where We’re Going Next, presentation by M. Zaharia, 2013
- 11. All rights reserved,© 2015 ICM UW How to start?
- 12. All rights reserved,© 2015 ICM UW First: download 12
- 13. All rights reserved,© 2015 ICM UW Second: ./bin/pyspark 13
- 14. All rights reserved,© 2015 ICM UW Third: Code much and often 14 import pyspark.ml.recommendation.ALS import pyspark.ml.recommendation.Rating // Transform Strings: "user_id,movie_id,rating" to Ratings: Rating(user_id:Int,movie_id:Int,rating:Double) data = sc.textFile("path/to/data.csv") ratings = data.map(lambda s: s.split(',')).map(lambda arr: Rating(int(arr[0]), int(arr[1]), float(arr[2])) // Build the recommendation model using ALS // Factor the rating matrix A=[n,m] into B=[n,f] and C=[f,m], where A ~= B x C numFeatures = 10; numIterations = 20 model = ALS.train(ratings, numFeatures, numIterations, 0.01)
- 15. All rights reserved,© 2015 ICM UW ● We know which products are preferred by a particular user ● Having information about preferences -- recommend to a particular user -- a product which she or he is likely to purchase ● Iterative method 15 = X Collaborative Filtering: Problem Statement
- 16. All rights reserved,© 2015 ICM UW Collaborative Filtering: Problem Statement 16 USER USER = ~TASTE DEMANDMOVIE MOVIE ~TASTE SUPPLY X Demo time!
- 17. All rights reserved,© 2015 ICM UW Tweets exploration 17 Demo time!
- 18. All rights reserved,© 2015 ICM UW Spark ecosystem is versatile yet seamless Ecosystem of high-level tools for various use-cases 18 Spark Core Spark SQL Spark Streaming near real-time MLLib machine learning GraphX graph processing SparkR R on Spark
- 19. All rights reserved,© 2015 ICM UW 19 What next? Trainings!
- 20. All rights reserved,© 2015 ICM UW Thank you! 20 Piotr Dendek pdendek@icm.edu.pl @pjden