Insight certainty 4/5 debate potential 2/5

Gleb Mezhanskiy: Data monitoring scales better than manual data testing

Gleb Mezhanskiy · A Novel Approach to Data Quality for the Modern Data Stack | Datafold’s Gleb Mezhanskiy · Sep 12, 2022 · at 5:45

Gleb Mezhanskiy, founder and CEO of Datafold, compares data quality paradigms in modern data stack architecture at Data Driven NYC.

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“Data testing is basically us writing unit tests for data are not scalable, whereas data monitoring is scalable because we can just automatically track data in the warehouse and automatically provision machine learning to track data for anomalies.”

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More from Gleb Mezhanskiy

Insight
Gleb Mezhanskiy: Data testing gives better signal-to-noise than data monitoring
“The signal to noise in data testing typically tends to be better because we define exactly what is wrong, what is right, versus in monitoring, it's Quite noisy, because we just, it just tells us when data doesn't conform to the historical properties, which doe…”
Gleb Mezhanskiy Sep 12, 2022 ▶ 5:59 A Novel Approach to Data Quality for the Modern Data Stack | Datafold’s Gleb Mezhanskiy
Assertion Not publicly verifiable
Mezhanskiy: Datafold's data-diff benchmarks over 1B rows in 5 minutes
“We run some benchmarks, and you can run this on like a twenty-five million row data set in less than 10 seconds, An over one billion row dataset in about five minutes.”
Gleb Mezhanskiy Sep 12, 2022 ▶ 16:37 A Novel Approach to Data Quality for the Modern Data Stack | Datafold’s Gleb Mezhanskiy
Disclosure
Gleb Mezhanskiy: A three-line SQL hotfix once crashed Lyft's data platform
“In my years of data engineer at Lyft, I was unlucky to break down, well, actually blow up the entire data platform by making a three line SQL code hotfix that filtered a little bit more rights than I anticipated.”
Gleb Mezhanskiy Sep 12, 2022 ▶ 2:25 A Novel Approach to Data Quality for the Modern Data Stack | Datafold’s Gleb Mezhanskiy
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