A presentation at KScope 19 in in Seattle, WA, USA by Robin Moffatt
The Changing Face of ETL Event-Driven Architectures for Data Engineers Photo by rmoff @rmoff
Photo by Samuel Sianipar on Unsplash
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Photo by Patrick Fore on Unsplash It used to be so simple @rmoff #KScope19 The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Photo by Eugenio Mazzone on Unsplash More Sources The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Photo by Tom Barrett on Unsplash More Targets The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Photo by Kirill on Unsplash More Data The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Batches and Buckets The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Applications Respond Photo by Deva Darshan from Pexels → an order was placed! Analytics Tell Us What Happened → how many orders were placed The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Photo by NASA on Unsplash @rmoff #KScope19 The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Photo by Mark Kamalov on Unsplash Events
@rmoff #KScope19 “ An event is both: * Notification * State transfer The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 A Customer Experience The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 A Sensor Reading The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Events @rmoff #KScope19 Basket Bread Canned Spaghetti The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Events @rmoff #KScope19 Basket Bread ItemAdd Bread The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd Bread Baked Beans Baked Beans The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd ItemRemove Bread Baked Beans Baked Beans The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd ItemRemove ItemAdd Bread Baked Beans Baked Beans Canned Spaghetti Canned Spaghetti The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd ItemRemove ItemAdd Bread Baked Beans Baked Beans Canned Spaghetti Canned Spaghetti The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd ItemRemove ItemAdd Bread Baked Beans Baked Beans Canned Spaghetti Canned Spaghetti The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events Basket Bread ItemAdd ItemAdd ItemRemove ItemAdd Bread Baked Beans Baked Beans Canned Spaghetti Canned Spaghetti The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Databases The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Do you think that’s a table you are querying? The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Time The Stream/Table Duality Table @rmoff #KScope19 Stream Account ID Amount 12345 + €50 12345
@rmoff #KScope19 The truth is the log. The database is a cache of a subset of the log. —Pat Helland Immutability Changes Everything http://cidrdb.org/cidr2015/Papers/CIDR15_Paper16.pdf The Changing Face of ETL: Event-Driven Architectures for Data Engineers Photo by Bobby Burch on Unsplash
@rmoff #KScope19 What is an Event Streaming Platform? Producer Connectors Consumer The Log Connectors Streaming Engine The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Immutable Event Log Old @rmoff #KScope19 New Messages are added at the end of the log The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Photo by Ash from Modern Afflatus on Unsplash This is Something New The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events reviews The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events reviews Operational dashboard The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events reviews Operational dashboard Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events CREATE STREAM reviews_clean AS SELECT * FROM reviews WHERE id IS NOT NULL; reviews reviews_clean Operational dashboard Filter out bad data Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Existing apps User data RDBMS txn log users Kafka Connect Kafka The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events reviews users reviews_clean Operational dashboard User data Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Review events CREATE CREATE SELECT SELECT STREAM enriched_reviews AS STREAM reviews_clean AS ** FROM reviews_clean r FROM reviews INNER JOIN users u WHERE id IS NOT NULL ON r.userid=u.userid; reviews users reviews_clean enriched_reviews Operational dashboard User data Join events to users, and filter Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Events in Action Notification service Review events Operational dashboard User data Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Events in Action Review events @rmoff #KScope19 CREATE STREAM unhappy_vips AS SELECT * FROM enriched_reviews WHERE rating Notification< 3 AND status = ‘Platinum’; service reviews users reviews_clean enriched_reviews Operational dashboard unhappy_vips User data Join events to users, and filter Data lake The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Photo by rmoff The Power of an Event-Driven Architecture
Not Everything is a Nail Events @rmoff #KScope19 RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Not Everything is a Nail Events RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Not Everything is a Nail Events Elasticsearch RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Not Everything is a Nail Graph Events Elasticsearch RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Side-by-Side Tech Evaluation @rmoff #KScope19 Events HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Side-by-Side Tech Evaluation Events @rmoff #KScope19 BiqQuery HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Side-by-Side Tech Evaluation @rmoff #KScope19 Snowflake Events BiqQuery HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Evolve Data Sources Producer Onpremises Consuming App A Consuming App B The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Evolve Data Sources Producer Onpremises Producer Consuming App A Consuming App B Cloud The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Evolve Data Sources Consuming App A Producer Consuming App B Cloud The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Tight Coupling != Flexible Orders @rmoff #KScope19 RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Tight Coupling != Flexible Orders RDBMS HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Tight Coupling != Flexible Orders RDBMS HDFS App The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Loose Coupling == Freedom to Evolve RDBMS Orders The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Loose Coupling == Freedom to Evolve RDBMS Orders HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Loose Coupling == Freedom to Evolve RDBMS Orders App HDFS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Cleansing temp_raw App IoT App RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Cleansing sensor_id time_epoch 42 1551136074 42 1551136125 1551136125 42 1551138129 IoT reading 13.05 13.11 13.11 13.04 temp_raw App App RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Cleansing sensor_id time_epoch 42 1551136074 42 1551136125 1551136125 42 1551138129 IoT reading 13.05 13.11 13.11 13.04 temp_raw Cleanse App App Cleanse RDBMS Cleanse The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Cleansing sensor_id time_epoch 42 1551136074 42 1551136125 1551136125 42 1551138129 reading 13.05 13.11 13.11 13.04 IoT temp_clean sensor_id 42 42 42 App time_epoch 1551136074 1551136125 1551138129 reading 13.05 13.11 13.04 App temp_raw SENSOR_ID IS NOT NULL RDBMS The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Enrichment RDBMS Events App 01 Join The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Enrichment RDBMS Events App 01 Join Elasticsearch App 02 Join The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 Transform Once, Use Many: Data Enrichment App 01 Events Elasticsearch RDBMS Join The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Photo by rmoff Events model the real world
Photo by rmoff Say NO to brittle pipelines
@rmoff #KScope19 App App App App cache monitoring cache MQ DWH security MQ search Hadoop The Changing Face of ETL: Event-Driven Architectures for Data Engineers
@rmoff #KScope19 App App App App request-response changelogs App App KAFKA App App DWH Hadoop messaging OR stream processing streaming data pipelines The Changing Face of ETL: Event-Driven Architectures for Data Engineers
CONFLUENT COMMUNITY DISCOUNT CODE KS19Meetup. 25% OFF* *Standard Priced Conference pass
@rmoff #KScope19 http://cnfl.io/book-bundle The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Photo by rmoff confluent.io/download http://cnfl.io/book-bundle http://cnfl.io/slack @rmoff
@rmoff #KScope19 Resources • CDC Spreadsheet #EOF • Blog: No More Silos: How to Integrate your Databases with Apache Kafka and CDC • #partner-engineering on Slack for questions • BD team (#partners / partners@confluent.io) can help with introductions on a given sales op The Changing Face of ETL: Event-Driven Architectures for Data Engineers
Data integration in architectures built on static, update-in-place datastores inevitably end up with pathologically high degrees of coupling and poor scalability. This has been the standard practice for decades, as we attempt to build data pipelines on top of databases that do a poor job modeling the fundamental objects that drive our businesses and systems: events.
Events carry both notification and state, and form a powerful primitive on which to build systems for developers and data engineers alike. Developers benefit from the asynchronous communication that events enable between services, and data engineers benefit from the integration capabilities. Everyone gains from using the standards-based, scalable and resilient streaming platform.
In this talk, we’ll discuss the concepts of events, their relevance to both software engineers and data engineers and their ability to unify architectures in a powerful way. We’ll see how stream processing makes sense in both a microservices and ETL environment, and why analytics, data integration and ETL fit naturally into a streaming world.
The following resources were mentioned during the presentation or are useful additional information.
