The hidden engineering behind machine learning products at Helixa
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Data Orchestration Summit 2020 organized by Alluxio https://www.alluxio.io/data-orchestration-summit-2020/ The hidden engineering behind machine learning products at Helixa Gianmario Spacagna, (Helixa) About Alluxio: alluxio.io Engage with the open source community on slack: alluxio.io/slack
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The hidden engineering behind machine learning products at Helixa
- 1. DATA ORCHESTRATION SUMMI T The hidden engineering behind machine learning products at Helixa Gianmario Spacagna Chief Scientist at Helixa
- 2. DATA ORCHESTRATION SUMMIT 2020 In the next 20 minutes you will learn about 1. A real ML system powering a platform used by thousands of marketers around the globe 2. The tools and engineering practices that enabled us to build fast, cheap, and robust pipelines
- 3. About Helixa Helixa is an audience intelligence platform that uses Machine Learning to provide accurate, and timely, consumers insights for modern market research
- 4. DATA ORCHESTRATION SUMMIT Audience: Size: 1.5M / 223M represented population François CholletBen Hamner George Hotz Top Influencers 201x 114x 106x Cifar News Top Media The Hacker News AngelList 65x 31x 28x Tensorflow Top Products and Companies Waymo Airbnb Engineering 107x 66x 55x Demographics 18-40 years old Male U.S. and India
- 5. DATA ORCHESTRATION SUMMIT Platform Requirements Multiple Datasets Accurate consumers insights Real-time analytics quickly Always available Minimum infrastructure maintenance Cost effective
- 6. DATA ORCHESTRATION SUMMIT Helixa ML System Overview
- 7. DATA ORCHESTRATION SUMMIT Helixa end-to-end pipeline Insights Engine Other Analytics Tools Audience Projection Real-time analytics applications Common Data Model Data Processing Data IntegrationsData Contents Embedding Entity Resolution Taxonomy Categorization Users Digital DNA Traits Classifiers Latent Interests Augmentation Machine Learning jobs
- 8. DATA ORCHESTRATION SUMMIT Helixa architecture Data Ingestions ML Cloud Services Pre-trained models External APIs ML LibrariesML pipelines Model repository Production DB Microservices Data Lake Batch Jobs Analytics applications
- 9. DATA ORCHESTRATION SUMMIT Batch inference Model repository and evaluation metrics Training and hyper-parameters tuning Analysis and Research ML libraries Data Labeling Feature Store Feature Engineering Data Lake Tech stack and tools In this talk we will focus on
- 11. DATA ORCHESTRATION SUMMIT Native Cloud Object (Data) Storage Benefits: ● Cheaper ● Elastic ● Highly available ● Performant Hadoop HDFS
- 12. DATA ORCHESTRATION SUMMIT Artifacts are saved in S3 and crawled by Glue Athena is used to build logical views on top of them such as: ▪ Retrieve the latest version of the artifact ▪ Aggregate multiple partitions of the same artifact ▪ Filter and merge with other tables ▪ Export snapshot of the views as versioned parquet datasets Data Lake(house) using Glue and Athena
- 13. DATA ORCHESTRATION SUMMIT Feature Store Partitions (X) S3 bucket ❏ users ❏ features ❏ feature_family=text_embedding ❏ timestamp=2020-10-14-12-58 ❏ _metadata.json ❏ part000.parquet ❏ part001.parquet ❏ … ❏ timestamp=2020-09-18-18-35 ❏ ... ❏ feature_family=picture_embedding ❏ ... ❏ feature_family=category_counts ❏ ... ❏ items ❏ other entities Parquet data indexed by user_id Metadata containing info on how the features were created Partition by set of features generated by the same job Creation time
- 14. DATA ORCHESTRATION SUMMIT Label Store Partitions (y) S3 bucket ❏ users ❏ labels ❏ variable=gender ❏ source=first_name ❏ timestamp=2020-10-14-12-58 ❏ _metadata.json ❏ part000.parquet ❏ part001.parquet ❏ … ❏ source=public_profile ❏ ... ❏ variable=age ❏ items ❏ other entities Partition by the variable we are trying to predict Partition by the source of ground truth Label management for weak learning done via
- 15. DATA ORCHESTRATION SUMMIT Prediction Store Partitions (y_pred) S3 bucket ❏ users ❏ predictions ❏ variable=gender ❏ model=xgbc ❏ timestamp=2020-11-05-17-22 ❏ _metadata.json ❏ part000.parquet ❏ part001.parquet ❏ … ❏ model=cnn ❏ ... ❏ variable=age ❏ ... ❏ items ❏ other entities Partition by the identifier of the model used to predict
- 17. DATA ORCHESTRATION SUMMIT Platforms for managing the ML lifecycle ● Training ● Predictions ● Model serving ● Model repository ● Experiments tracking ● Evaluation metrics Production ● Dev data versioning and linkage ● Automated evaluation reports ● Collaborative experiments ● Deep Learning computing environment R&D
- 18. DATA ORCHESTRATION SUMMIT R&D workflow Pull Notebooks and data stored and shared in S3 Data cache Dev unix machine in the cloud Notebook name matching branch ID Install the latest version of the code Develop code locally using professional IDEs Feature branches matching Jira key Gitflow branching model Commit and push
- 19. DATA ORCHESTRATION SUMMIT EC2 memory-optimized machines (r4 or r5 family) EBS volume of 250GB of storage Alluxio and Jupyter services to start at boot time 200GB reserved for the Alluxio cache S3 buckets mounted locally in --readonly mode using fuse API Read parquet data in multi-processing using Dask directly from the local file system instead of using the S3 boto API cache configuration
- 20. DATA ORCHESTRATION SUMMIT Research & Development data: ~1TB We only focus on 15% of data every month (~150GB) Re-access of the data for every kernel restart (~5 times a day) Data science team members (~5 people) Datasets spread into files of ~120MB each => roughly 1.2k files and 500k read requests every month We observed a speed-up between 3x to 5x using Alluxio + all of the benefits of accessing the S3 data from the POSIX API benefits for the R&D
- 21. DATA ORCHESTRATION SUMMIT Processing large datasets with EMR Picture source: https://dimensionless.in/different-ways-to-manage-apache-spark-applications-on-amazon-emr/ Ephemeral clusters on spot instances can dramatically reduce the cost of operations + SparkMagic SUBMIT JOB
- 23. DATA ORCHESTRATION SUMMIT Automate code with a task-oriented containerized jobs Picture source: https://medium.com/@davidstevens_16424/make-my-day-ta-science-easier-e16bc50e719c All of the analysis findings are moved into a production-quality modules and entry points declared in makefiles for tasks such as: ● Data preparations ● Feature extractions ● Model selection / tuning ● Evaluations ● Model Inference ● Predictions post-processing
- 24. DATA ORCHESTRATION SUMMIT Automate tasks execution using Continuous Integration (CI) Picture source: https://deploybot.com/blog/the-expert-guide-to-continuous-integration On commit Code tests Evaluation reportsBuilds & Deployment On release
- 25. DATA ORCHESTRATION SUMMIT Embarrassingly parallel data processing and batch inference with AWS batch Source: https://spotinst.com/blog/cost-efficient-batch-computing-on-spot-instances-aws-batch-integration/ JobsData batches ~ a few GBs each Output storage
- 26. DATA ORCHESTRATION SUMMIT Model serving via microservices SERVERLESS CHOICE Cheap and simple solution for deploying containers without have to care about the infrastructure Limits as of today: Max 4 vCPUs and 30GB of RAM OR SERVERFUL CHOICE Advanced, customizable, powerful, widespread solutions for containers orchestration on pools of EC2 instances Requires infrastructure management AWS EC2
- 27. DATA ORCHESTRATION SUMMIT How do containers scale for real-time varying requests load? Number of requests per second capacity unexpected sudden burst Over-provisioning cost
- 28. DATA ORCHESTRATION SUMMIT Training pipeline Real-time serverless model serving Lookup user and model info Get users features trigger Update metainfo and configs REST request Get model Package requirements EFS read libraries predictionsreturn save model Build and deploy
- 29. DATA ORCHESTRATION SUMMIT Comparison for real-time applications Horizontal scaling Autoscaling rules based on predicted load and capacity Elastic, based on real-time demand Provisioning time Minutes Immediately or seconds if cold start Burst concurrency Depends on available resources 3000 + additional 500 every minute Cost efficiency Pay for the over-provisioning Only pay for what you use (10x cheaper in our use cases) Vertical scaling Limited by instance types Limited to 3GB and 2 CPUs Execution timeout Unlimited 15 minutes
- 30. DATA ORCHESTRATION SUMMIT Pick the best of both worlds
- 31. DATA ORCHESTRATION SUMMIT Orchestrating functions and microservices with Step Functions Workflows defined as a finite states machine and plug-and-play integration with most of the AWS services: AWS Batch ECS Sagemaker
- 34. DATA ORCHESTRATION SUMMIT Centralized logging with the ELK stack Generate Logs Aggregation & Transformation Storage & Indexing Visualization & Analysis
- 35. DATA ORCHESTRATION SUMMIT Infrastructure Monitoring and Alerting Basic Monitoring AWS resources and custom metrics generated by your applications and services General Infra Monitoring Cloud-scale monitoring of logs, metrics and traces from distributed, dynamic and hybrid infrastructure. Serverless Monitoring All-in-one performance management tool down to the single lines of code specifically designed for serverless applications.
- 36. DATA ORCHESTRATION SUMMIT KPIs and Metrics Dashboard Data sanity checks KPIs over time such as: ● Distribution shifts ● Model drift ● Utilization ● Coverage Analytics dashboard on top of athena SQL queries Custom programmatic dashboards with interactive charts
- 38. DATA ORCHESTRATION SUMMITSource: https://papers.nips.cc/paper/5656-hidden-technical-debt-in-machine-learning-systems Only a small fraction of real-world ML systems is composed of the ML Code. The required surrounding infrastructure is vast and complex.
- 39. DATA ORCHESTRATION SUMMIT Facebook new motto in 2014Facebook original motto
- 41. DATA ORCHESTRATION SUMMIT Embrace the serverless paradigm
- 42. DATA ORCHESTRATION SUMMIT Download the Non-Technical Guide Topics covered: ✅ Getting started with understanding the technology ✅ Designing the right ML product ✅ Planning under uncertainty ✅ Building a balanced ML team www.helixa.ai/machine-learning-guide-2020
- 43. Gianmario Spacagna Chief Scientist at Helixa gspacagna@helixa.ai gm_spacagna gmspacagna datasciencevademecum.com