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Introduction to apache spark
- 1. Certified Apache Spark and Scala Training – DataFlair Introduction to Apache Spark
- 2. Certified Apache Spark and Scala Training – DataFlair Before Spark Need for Spark What is Apache Spark ? Goals Why Spark ? RDD & its Operations Features Of Spark Agenda
- 3. Certified Apache Spark and Scala Training – DataFlair Before Spark Batch Processing Stream Processing Interactive Processing Graph Processing Machine Learning
- 4. Certified Apache Spark and Scala Training – DataFlair Need For Spark • Need for a powerful engine that can process the data in Real-Time (streaming) as well as in Batch mode • Need for a powerful engine that can respond in Sub-second and perform In-memory analytics • Need for a powerful engine that can handle diverse workloads: – Batch – Streaming – Interactive – Graph – Machine Learning
- 5. Certified Apache Spark and Scala Training – DataFlair Apache Spark is a powerful open source engine which can handle: – Batch processing – Real-time (stream) – Interactive – Graph – Machine Learning (Iterative) – In-memory What is Apache Spark?
- 6. Certified Apache Spark and Scala Training – DataFlair Introduction to Apache Spark Lightening fast cluster computing tool General purpose distributed system Provides APIs in Scala, Java, Python, and R
- 7. Certified Apache Spark and Scala Training – DataFlair History Introduced by UC Berkeley Open Sourced Donated to Apache Became Top-level project World record in sorting Most active project at Apache 2010 2011 2012 2013 2014 20152009
- 8. Certified Apache Spark and Scala Training – DataFlair Sort Record Hadoop MapReduce Spark Data Size 102.5 TB 100 TB Time Taken 72 min 23 min No of nodes 2100 206 No of cores 50400 physical 6592 virtualized Cluster disk throughput 3150 GBPS 618 GBPS Network Dedicated 10 Gbps Virtualized 10 Gbps Hadoop-MapReduce 2100 Nodes 206 Nodes 72 min 23 min Src: Databricks Spark
- 9. Certified Apache Spark and Scala Training – DataFlair Goals Batch StreamingInteractive One Stack to Rule them all Easy to combine batch, streaming, and interactive computations
- 10. Certified Apache Spark and Scala Training – DataFlair Goals Easy to combine batch, streaming, and interactive computations Easy to develop sophisticated algorithms
- 11. Certified Apache Spark and Scala Training – DataFlair Goals Easy to combine batch, streaming, and interactive computations Easy to develop sophisticated algorithms Compatible with existing open source ecosystem
- 12. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop.
- 13. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Operation1 Operation2 Disk … Operation1 Operation1 …Disk
- 14. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Operation 1 Operation 2 Disk … Disk Operation n Disk Disk Operation 1 Operation 2 … Operation n Disk Disk
- 15. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Language support like Scala, Java, Python and R.
- 16. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Language support like Scala, Java, Python and R. Support Real time and Batch Processing. Spark Streaming Spark Engine Input data stream Batches of Input data Batches of Processed data
- 17. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Language support like Scala, Java, Python and R. Support Real time and Batch Processing. Lazy Operations – optimize the job before execution.
- 18. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Language support like Scala, Java, Python and R. Support Real time and Batch Processing. Lazy Operations – optimize the job before execution. Support for multiple transformations and actions. RDD1 RDD3RDD2 Result Transformation 1 map() Transformation 2 filter() Action (collect)
- 19. Certified Apache Spark and Scala Training – DataFlair Why Spark ? 100x faster than Hadoop. In-memory computation. Language support like Scala, Java, Python and R. Support Real time and Batch Processing. Lazy Operations – optimize the job before execution. Support for multiple transformations and actions. Compatible with hadoop, can process existing hadoop data.
- 20. Certified Apache Spark and Scala Training – DataFlair Spark Architecture
- 21. Certified Apache Spark and Scala Training – DataFlair Nodes Master Node Slave Nodes Master Worker Spark Nodes
- 22. Certified Apache Spark and Scala Training – DataFlair Basic Spark Architecture Sub Work Sub Work Sub Work Sub Work Sub WorkSub Work Sub Work Sub Work Sub Work Sub Work Sub Work Sub Work Sub Work Sub Work Sub Work Sub Work Work
- 23. Certified Apache Spark and Scala Training – DataFlair Resilient Distributed Dataset (RDD) RDD is a simple and immutable collection of objects. Obj1 Obj2 Obj3 Obj n .... RDD
- 24. Certified Apache Spark and Scala Training – DataFlair Resilient Distributed Dataset (RDD) RDD is a simple and immutable collection of objects. RDD can contain any type of (scala, java, python and R) objects. RDD Objects
- 25. Certified Apache Spark and Scala Training – DataFlair Resilient Distributed Dataset (RDD) RDD is a simple and immutable collection of objects. RDD can contain any type of (scala, java, python and R) objects. Each RDD is split-up into different partitions, which may be computed on different nodes of clusters. Partition1 Partition2 Partition3 Partition4 Partition5 Partition6 RDD Partition1 Partition2 Partition3 Partition4 Partition5 Partition6
- 26. Certified Apache Spark and Scala Training – DataFlair Employee-data.txt B1 B2 B3 B4 B9 B5 B10 B12 B11 B6 B8 B7 Partition-1 Partition-2 Partition-3 Partition-4 Partition-5 . . . RDD Create RDD Resilient Distributed Dataset (RDD) Hadoop Cluster
- 27. Certified Apache Spark and Scala Training – DataFlair RDD Operations RDD Operations PersistenceActionsTransformations
- 28. Certified Apache Spark and Scala Training – DataFlair RDD Operations – Transformation Transformation: Set of operations that define how RDD should be transformed Creates a new RDD from the existing one to process the data Lazy evaluation: Computation doesn’t start until an action associated E.g. Map, FlatMap, Filter, Union, GroupBy, etc.
- 29. Certified Apache Spark and Scala Training – DataFlair RDD Operations – Action Action: Triggers job execution. Returns the result or write it to the storage. E.g. Count, Collect, Reduce, Take, etc.
- 30. Certified Apache Spark and Scala Training – DataFlair RDD Operations – Persistence Persistence: Spark allows caching/Persisting entire dataset in memory Caches the RDD in the memory for future operations Primary Storage Cache
- 31. Certified Apache Spark and Scala Training – DataFlair RDD Parent RDD Lineage Transformations Actions Result Creates a new RDD based on custom business logic (map(), flatMap()…) (saveAsTextFile(), count()…) Returns output to Driver or exports data to storage system after computation RDD RDD Operations
- 32. Certified Apache Spark and Scala Training – DataFlair Features of Spark Processing Memory Management Window Criteria Fault Tolerance Duplicate Elimination Speed Process every record exactly once 100 X Faster Than Hadoop Automatic Memory Management Recovers Automatically Time based window criteria Diverse processing platform
- 33. Certified Apache Spark and Scala Training – DataFlair Thank You DataFlair /c/DataFlairWS /DataFlairWS