Mark Grover
CEO and CFO, Stemma.ai, Amundsen
Mark is the CEO of Stemma.ai and co-creator of Amundsen, an open-source data discovery and metadata engine created at Lyft and now used by 30+ companies like ING, Square, Workday, Gusto and more.

2021 Talk: From discovering to trusting data

Over a third of analyst time is spent in understanding what data exists, can it be trusted and how to use it. Countless Data Engineering time is spent in answering the same questions about data - what does that column mean, how does it get populated, how often does it update and if there’s any incident going on? The answer thus far to such questions has been curation. You request volunteers to put in this information or hire project managers to make sure it does but it always fails because documentation gets out of date. The holy grail to solving this is automation - collecting metadata automatically from various data sources and creating a rich graph - of data sets, reports, humans, jobs, streams, event schemas and more. Then build opinionated products on top of it to deliver a better experience for data users. At Lyft, we have made our analysts and data scientists over 20% more productive by making it easier to discover data. Recently, we open sourced Amundsen and it’s now being used by ING, Square, Workday and many more. However, as we made it easy to discover data, it’s led to an interesting challenge. Not only is it now easy to discover good trusted data, it’s also easier to discover bad data that was previously hidden in the unforgotten nook and crannies of the data lake. Consequently, we are now asking ourselves, how can we recommend not just any data but trusted data to our users. This talk gives a quick overview of Amundsen and then goes into detail on how we have tried both automated and curated metadata to showcase what’s trusted and not in Amundsen. It will dive deep into linking the Airflow DAG which produced the data (task level lineage), linking what and how many dashboards are built from a given data set (table level lineage), as well as SLAs and historical landing times to give users signal into what’s trusted. The talk will end with an insight into current challenges and how we may solve them in the future.