Best Practices for Using Alluxio with Spark
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Best Practices for Using Alluxio with Spark Spark Summit San Francisco June 6, 2017 Gene Pang, Alluxio, Inc. Cheng Chang, Alluxio, inc.
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Best Practices for Using Alluxio with Spark
- 1. Best Practices for Using Alluxio with Spark Gene Pang,Alluxio, Inc. Cheng Chang,Alluxio, Inc. Spark Summit SF - June 2017
- 2. Outline Alluxio Overview Alluxio + Spark Use Cases Using Spark with Alluxio Performance Evaluation Demo 1 2 3 4 5 ©2017 Alluxio, Inc.All Rights Reserved 2
- 3. Data EcosystemYesterday • One Compute Framework • Single Storage System • Co-located ©2017 Alluxio, Inc.All Rights Reserved 3
- 4. Data Ecosystem Today • Many Compute Frameworks • Multiple Storage Systems • Most not co-located ©2017 Alluxio, Inc.All Rights Reserved 4
- 5. Data Ecosystem Issues • Each application manage multiple data sources • Add/Removing data sources require application changes • Storage optimizations requires application change • Lower performance due to lack of locality ©2017 Alluxio, Inc.All Rights Reserved 5
- 6. Data Ecosystem with Alluxio • Apps only talk to Alluxio • Simple Add/Remove • No App Changes • Highest performance in Memory • No Lock in Native File System Hadoop Compatible File System Native Key-Value Interface Fuse Compatible File System HDFS Interface Amazon S3 Interface Swift Interface GlusterFS Interface ©2017 Alluxio, Inc.All Rights Reserved 6
- 7. Next Gen Analytics with Alluxio Native File System Hadoop Compatible File System Native Key-Value Interface Fuse Compatible File System HDFS Interface Amazon S3 Interface Swift Interface GlusterFS Interface Apps, Data & Storage at Mem Speed ü Big Data/IoT ü AI/ML ü Deep Learning ü Cloud Migration ü Multi Platform ü Autonomous ©2017 Alluxio, Inc.All Rights Reserved 7
- 8. Fastest Growing Big Data Open Source Projects Fastest Growing open- source project in the big data ecosystem Running in large production clusters 500+ Contributors from 100+ organizations 0 100 200 300 400 500 0 10 20 30 40 45 NumberofContributors Github Open Source Contributors by Month Alluxio Spark Kafka Redis HDFS Cassandra Hive ©2017 Alluxio, Inc.All Rights Reserved 8
- 9. Outline Alluxio Overview Alluxio + Spark Use Cases Using Spark with Alluxio Performance Evaluation Demo 1 2 3 4 5 ©2017 Alluxio, Inc.All Rights Reserved 9
- 10. Big Data Case Study – 1 06/12/17 ©2017 Alluxio, Inc.All Rights Reserved Challenge – Gain end to end view of business with large volume of data Queries were slow / not interactive, resulting in operational inefficiency SPARK TERADATA SPARK TERADATA Solution – ETL Data from Teradata to Alluxio Impact – Faster Time to Market – “Now we don’t have to work Sundays” http://bit.ly/2oMx95W
- 11. Big Data Case Study – 1 16/12/17 ©2017 Alluxio, Inc.All Rights Reserved Challenge – Gain end to end view of business with large volume of data Queries were slow / not interactive, resulting in operational inefficiency SPARK Baidu File System SPARK Baidu File System Solution – With Alluxio, data queries are 30X faster Impact – Higher operational efficiency http://bit.ly/2pDHS3O
- 12. Big Data Case Study – Challenge – Gain end to end view of business with large volume of data for $5B Travel Site Queries were slow / not interactive, resulting in operational inefficiency SPARK HDFS Solution – With Alluxio, 300x improvement in performance Impact – Increased revenue from immediate response to user behavior Use case: http://bit.ly/2pDJdrq CEPH HDFS CEPH FLINK SPARK FLINK ©2017 Alluxio, Inc.All Rights Reserved 1 2
- 13. Machine Learning Case Study – 1 36/12/17 ©2017 Alluxio, Inc.All Rights Reserved Challenge – Disparate Data both on-prem and Cloud. Heterogeneous types of data. Scaling of Exabyte size data. Slow due to disk based approach. SPARK HDFS SPARK MINIO Solution – Using Alluxio to prevent I/O bottlenecks Impact – Orders of magnitude higher performance than before. http://bit.ly/2p18ds3 MESOS
- 14. Outline Alluxio Overview Alluxio + Spark Use Cases Using Spark with Alluxio Performance Evaluation Demo 1 2 3 4 5 ©2017 Alluxio, Inc.All Rights Reserved 1 4
- 15. Consolidating Memory Storage Engine & Execution Engine Same Process • Two copies of data in memory – double the memory used • Inter-process Sharing Slowed Down by Network / Disk I/O Spark Compute Spark Storage block 1 block 3 HDFS / Amazon S3 block 1 block 3 block 2 block 4 Spark Compute Spark Storage block 1 block 3 ©2017 Alluxio, Inc.All Rights Reserved 1 5
- 16. Consolidating Memory Storage Engine & Execution Engine Different process • Half the memory used • Inter-process Sharing Happens at Memory Speed Spark Compute Spark Storage HDFS / Amazon S3 block 1 block 3 block 2 block 4 HDFS disk block 1 block 3 block 2 block 4 Alluxio block 1 block 3 block 4 Spark Compute Spark Storage ©2017 Alluxio, Inc.All Rights Reserved 1 6
- 17. Data Resilience During Crash Spark Compute Spark Storage block 1 block 3 HDFS / Amazon S3 block 1 block 3 block 2 block 4 Storage Engine & Execution Engine Same Process ©2017 Alluxio, Inc.All Rights Reserved 1 7
- 18. Data Resilience During Crash CRASH Spark Storage block 1 block 3 HDFS / Amazon S3 block 1 block 3 block 2 block 4 • Process Crash Requires Network and/or Disk I/O to Re-read Data Storage Engine & Execution Engine Same Process ©2017 Alluxio, Inc.All Rights Reserved 1 8
- 19. Data Resilience During Crash CRASH HDFS / Amazon S3 block 1 block 3 block 2 block 4 Storage Engine & Execution Engine Same Process • Process Crash Requires Network and/or Disk I/O to Re-read Data ©2017 Alluxio, Inc.All Rights Reserved 1 9
- 20. Data Resilience During Crash Spark Compute Spark Storage HDFS / Amazon S3 block 1 block 3 block 2 block 4 HDFS disk block 1 block 3 block 2 block 4 Alluxio block 1 block 3 block 4 Storage Engine & Execution Engine Different process ©2017 Alluxio, Inc.All Rights Reserved 2 0
- 21. Data Resilience During Crash • Process Crash – Data is Re-read at Memory Speed HDFS / Amazon S3 block 1 block 3 block 2 block 4 HDFS disk block 1 block 3 block 2 block 4 Alluxio block 1 block 3 block 4 CRASH Storage Engine & Execution Engine Different process ©2017 Alluxio, Inc.All Rights Reserved 2 1
- 22. Accessing Alluxio Data From Spark Writing Data Write to an Alluxio file Reading Data Read from an Alluxio file ©2017 Alluxio, Inc.All Rights Reserved 2 2
- 23. Code Example for Spark RDDs Writing RDD to Alluxio rdd.saveAsTextFile(alluxioPath) rdd.saveAsObjectFile(alluxioPath) Reading RDD from Alluxio rdd = sc.textFile(alluxioPath) rdd = sc.objectFile(alluxioPath) ©2017 Alluxio, Inc.All Rights Reserved 2 3
- 24. Code Example for Spark DataFrames Writing to Alluxio df.write.parquet(alluxioPath) Reading from Alluxio df = sc.read.parquet(alluxioPath) ©2017 Alluxio, Inc.All Rights Reserved 2 4
- 25. Outline Alluxio Overview Alluxio + Spark Use Cases Using Spark with Alluxio Performance Evaluation Demo 1 2 3 4 5 ©2017 Alluxio, Inc.All Rights Reserved 2 5
- 26. Experiments Spark 2.0.0 + Alluxio 1.2.0 Single worker:Amazon r3.2xlarge Comparisons: Alluxio Spark Storage Level: MEMORY_ONLY Spark Storage Level: MEMORY_ONLY_SER Spark Storage Level: DISK_ONLY ©2017 Alluxio, Inc.All Rights Reserved 2 6
- 27. 0 50 100 150 200 250 0 5 10 15 20 25 30 35 40 45 50 Time[seconds] RDD Size [GB] Alluxio (textFile) Alluxio (objectFile) DISK_ONLY MEMORY_ONLY_SER MEMORY_ONLY Reading Cached RDD ©2017 Alluxio, Inc.All Rights Reserved 2 7
- 28. 0 100 200 300 400 500 600 700 800 Alluxio (textFile) Alluxio (objectFile) No Alluxio Time [seconds] 7x speedup 16x speedup New Context: Read 50 GB RDD (S3) ©2017 Alluxio, Inc.All Rights Reserved 2 8
- 29. Reading Cached DataFrame (parquet) 0 50 100 150 200 250 0 5 10 15 20 25 30 35 40 45 50 Time[seconds] DataFrame Size [GB] Alluxio (textFile) MEMORY_ONLY_SER MEMORY_ONLY ©2017 Alluxio, Inc.All Rights Reserved 2 9
- 30. New Context: Read 50 GB DataFrame (S3) 0 250 500 750 1000 1250 1500 1750 Alluxio No Alluxio Time [seconds] 10x average speedup, 17x peak speedup ©2017 Alluxio, Inc.All Rights Reserved 3 0
- 31. Outline Alluxio Overview Alluxio + Spark Use Cases Using Spark with Alluxio Performance Evaluation Demo 1 2 3 4 5 ©2017 Alluxio, Inc.All Rights Reserved 3 1
- 32. Demo Environment Spark Alluxio ©2017 Alluxio, Inc.All Rights Reserved 3 2
- 33. Conclusion Easy to use Alluxio with Spark Predictable and improved performance Easily connect to various storages ©2017 Alluxio, Inc.All Rights Reserved 3 3
- 34. Thank you! Gene Pang Cheng Chang gene@alluxio.com cc@alluxio.com Twitter: @unityxx Twitter: @uronce Twitter.com/alluxio Linkedin.com/alluxio Website www.alluxio.com E-mail info@alluxio.com @ Social Media ©2017 Alluxio, Inc.All Rights Reserved 3 4