Delta Lake Blogs

This post discusses the pros and cons of Hive-style partioning.

Unlock Delta Lakes for PyTorch Training with DeltaTorch

by Daniel Liden, Michael Shtelma

This post demonstrates how to create PyTorch DataLoaders using Delta tables as data sources for training deep learning models.

Introducing Delta Lake Table Features

This introduces Delta Lake Table Features, a discrete feature-based compatibility scheme that replaces the traditional integer protocol versioning for Delta Lake tables and clients.

Delta Lake Change Data Feed (CDF)

by Nick Karpov, Matthew Powers

This blog shows how to enable and use the Delta Lake Change Data Feed.

Delta Lake’s transaction log protocol and its implementations

This blog explains the Delta Lake transaction log protocol and its various implementation.

Delta Lake Deletion Vectors

This blog introduces the new Deletion Vectors table feature for Delta Lake tables, and explains how Deletion Vectors speed up operations that modify existing data in your lakehouse.

Using Ibis with PySpark on Delta Lake tables

by Marlene Mhangami, Matthew Powers

This post explains how to use Ibis to query Delta tables with PySpark

Delta Lake Z Order

This post explains how to use Delta Lake Z Order to make your queries run faster

Delta Lake 2.3.0 Released

by Allison Portis, Matthew Powers

This post explains some of the key features in the Delta Lake 2.3.0 release

Open source self-hosted Delta Sharing server

by Shingo OKAWA

This post explains Kotosiro Delta Sharing server basic instructions

How Delta Lake uses metadata to make certain aggregations much faster

by Matthew Powers, Scott Sandre

This post explains Delta Lake performance optimizations that make some aggregations execute quicker

How to use Delta Lake generated columns

How to create Delta Lake tables with generated columns and the benefits of this feature

Introducing Support for Delta Lake Tables in AWS Lambda

How to use deltalake in AWS Lambda with AWS SDK for pandas

How to create and append to Delta Lake tables with pandas

This post explains how to create and append to Delta Lake tables with pandas

Running ML Workflows with Delta Lake and Ray

by Jim Hibbard

This post explains how you can read Delta Lake with the Ray compute framework

How to Convert from CSV to Delta Lake

This post explains how to convert from a CSV data lake to Delta Lake, which offers much better features.

Getting started contributing to Delta Lake Spark

This post explains the full development loop with the Delta Lake Spark connector. You'll learn how to retrieve and navigate the codebase, make changes, and package and debug custom builds.

New features in the Python deltalake 0.7.0 release of delta-rs

by Will Jones, Matthew Powers

This post explains the new features in the deltalake 0.7.0 release

Delta Lake Merge

This post shows how to use MERGE with Delta tables.

Delta Lake Schema Evolution

This post shows how to enable schema evolution in Delta tables and when this is a good option.

Delta Lake Time Travel

This post shows how to time travel between different versions of a Delta table.

Delta Lake Small File Compaction with OPTIMIZE

This post shows compact small files in Delta tables with OPTMIZE.

Adding and Deleting Partitions in Delta Lake tables

by Matthew Powers, Ryan Zhu

This post shows add partitions and remove partitions from Delta Lake tables.

Delta Lake Vacuum Command

by Matthew Powers, Nick Karpov

This blog post explains how to vacuum files marked for deletion from storage with the Delta Lake Vacuum command.

Reading Delta Lake Tables into Polars DataFrames

by Matthew Powers, Chitral Verma

This post shows how to read Delta Lake tables into Polars DataFrames.

Building a more efficient data infrastructure for machine learning with Open Source using Delta Lake, Amazon SageMaker, and EMR

by Vedant Jain, Denny Lee

In this blog, we’ll explore how connecting Delta Lake, Amazon SageMaker Studio, and Amazon EMR can simplify the end-to-end workflow required to support data engineering and data science projects.

Data Sharing across Government Agencies using Delta Sharing

by Li Yu, Mubashir Kazia, Jon D. Ceanfaglione, Prabha Rajendran, Purushotam Shrestha, Shawn A. Benjamin

This post shows how government agencies are sharing data with Delta Sharing.

How to Delete Rows from a Delta Lake Table

This post teaches you how to delete rows from a Delta Lake table and how the operation is implemented under the hood.

Delta Lake Constraints and Checks

This post shows how to add constraints to your Delta table to avoid certain types of values from getting appended.

Delta Lake Schema Enforcement

This post teaches you about schema enforcement in Delta Lake and why it's better than what's offered by data lakes

Why PySpark append and overwrite write operations are safer in Delta Lake than Parquet tables

This post shows you why PySpark overwrite operations are safer with Delta Lake and how the different save mode operations are implemented under the hood.

How to Create Delta Lake tables

This post shows you how to create Delta Lake tables with Python, SQL, and PySpark.

How to Version Your Data with pandas and Delta Lake

This post shows you how to version your pandas datasets and the benefits you'll enjoy with versioned data.

Sharing a Delta Table’s Change Data Feed with Delta Sharing 0.5.0

by Will Girten

We are excited to announce the release of Delta Sharing 0.5.0.

How to Rollback a Delta Lake Table to a Previous Version with Restore

This post shows you how to rollback Delta Lake tables to previous versions with restore.

Converting from Parquet to Delta Lake

This post shows how to convert a Parquet table to a Delta Lake.

Why we migrated to a Data Lakehouse on Delta Lake for T-Mobile Data Science and Analytics Team

by Robert Thompson, Geoff Freeman

In this post, we will discuss the how and why we migrated from databases and data lakes to a data lakehouse on Delta Lake. Our lakehouse architecture allows reading and writing of data without blocking and scales out linearly....

How to drop columns from a Delta Lake table

This post shows you two ways to drop columns from Delta Lake tables.

Apache Flink Source Connector for Delta Lake tables

by Krzysztof Chmielewski, Scott Sandre, Denny Lee

We are excited to announce the release of Delta Connectors 0.5.0, which introduces the new Flink/Delta Source Connector on Apache Flink™ 1.13 that can read directly from Delta tables using Flink’s DataStream API.

Delta 2.0 - The Foundation of your Data Lakehouse is Open

by Tathagata Das, Denny Lee

We are happy to announce the release of the Delta Lake 2.0 on Apache Spark™ 3.2! The significance of Delta Lake 2.0 is not just a number - though it is timed quite nicely with Delta Lake’s 3rd birthday....

Multi-cluster writes to Delta Lake Storage in S3

by Scott Sandre, Denny Lee, Mariusz Kryński (Samba TV)

While Delta Lake has supported concurrent reads from multiple clusters since its inception, there were limitations for multi-cluster writes specifically to Amazon S3. Note, this was not a limitation for Azure ADLSgen2 nor Google GCS, as S3 currently lacks...

Delta Lake 1.2 - More Speed, Efficiency and Extensibility Than Ever

by Venki Korukanti, Scott Sandre, Tathagata Das, Allison Portis, Denny Lee, Vini Jaiswal

Introducing performance optimizations that will supercharge your data pipelines at any scale.

Writing to Delta Lake from Apache Flink

by Fabian Paul, Pawel Kubit, Scott Sandre, Tathagata Das, Denny Lee

Learn more about how you can write from Apache Flink to Delta Lake about the latest release of the open-source project Delta Sharing and how it enables sharing on Google Cloud Storage, among other enhancements.

Extending Delta Sharing to Google Cloud Storage

by Will Girten, Shixiong Zhu

Learn more about the latest release of the open-source project Delta Sharing and how it enables sharing on Google Cloud Storage, among other enhancements.

Delta Connectors 0.3.0 Released

by Allison Portis

We are excited to announce the release of Delta Connectors 0.3.0.

Delta Lake 1.1.0 Released

by Scott Sandre

We are excited to announce the release of Delta Lake 1.1.0.

Delta Sharing 0.3.0 Released

by Lin Zhou

We are excited to announce the release of Delta Sharing 0.3.0.

Power BI Delta Sharing Connector

We are excited about the recently announced preview of the Power BI Delta Sharing connector

Delta Lake User Survey (2021 H2)

We would like to invite you to provide your feedback on Delta Lake OSS.

Delta Lake 1.0.0 Released

by Tathagata Das

We are excited to announce the release of Delta Lake 1.0.0 on Apache Spark 3.1.

AMA: Growing the Delta Lake ecosystem

On March 11th, 2021 9:00 am PT, join us for this fun Delta Lake AMA session where we discuss with QP Hou, Christian Williams, and Alexander Kushnir from Scribd on growing the Delta Lake open-source ecosystem.

Salesforce Engineering: Delta Lake Tech Talk Series

We are happy to announce the Salesforce Engineering Delta Lake Tech Talk Series for March and April 2021.

Delta Lake 0.8.0 Released

We are excited to announce the release of Delta Lake 0.8.0.

Salesforce Engineering: Delta Lake Blog Series

Salesforce Engineering has published a series of blogs on how they use Delta Lake.

Salesforce Engineering: Global Synchronousness and Ordering in Delta Lake

At Salesforce, we maintain a platform to capture customer activity — various kinds of sales events such as emails, meetings, and videos. These events are either consumed by downstream products in real time or stored in our data lake, which...

Salesforce Engineering: Engagement Activity Delta Lake, Redshift Sectrum supports Delta Lake

We have a couple of exciting call outs this week!

Getting Started with Delta Lake

Want to learn more about Delta Lake? Check out this series of Delta Lake videos.

Delta Lake Sessions at Spark+AI Summit North America 2020

We're really excited for the numerous Delta Lake training and conference sessions that will be showcased throughout Spark+AI Summit NA 2020.

Delta Lake 0.7.0 Released

We are excited to announce the release of Delta Lake 0.7.0 on Apache Spark 3.0. This is the first release on Spark 3.x and adds support for metastore-defined tables and SQL DDLs.

Delta Lake 0.6.1 Released

We are excited to announce the release of Delta Lake 0.6.1, which fixes a few critical bugs in merge operation and operation metrics. If you are using version 0.6.0, it is strongly recommended that you upgrade to version 0.6.1.

Delta Lake 0.6.0 Released

We are excited to announce the release of Delta Lake 0.6.0, which introduces schema evolution and performance improvements in merge, and operation metrics in table history.

Delta Lake Newsletter: 2020-03-20 Edition

For this edition of the Delta Lake Newsletter, find out more about the latest and upcoming tech talks and videos.

Diving into Delta Lake Online Tech Talk Series

For our next series of Delta Lake online tech talks, we're excited to dive into the internals with our Diving into Delta Lake series. This will be a fun set of tech talks with live demos and Q&A. Check them...

Delta Lake Online Tech Talks

We’re excited to announce the next series of Delta Lake online tech talks over the next few weeks. This will be a fun set of tech talks with live demos and Q&A. Check them out!

Delta Lake 0.5.0 Released

We are excited to announce the release of Delta Lake 0.5.0, which introduces Presto/Athena support and improved concurrency.

Delta Lake Newsletter: 2019-10-03 Edition (incl. SAIS EU 2019 Sessions)

This edition of the Delta Lake Newsletter, find out more about the latest and upcoming webinars, meetups, and publications. For this edition, we will also focus on the many sessions at Spark+AI Summit EU 2019 in Amsterdam.

Delta Lake 0.4.0 Released

We are excited to announce the release of Delta Lake 0.4.0 which introduces Python APIs for manipulating and managing data in Delta tables.

Delta Lake 0.3.0 Released

We are happy to announce the availability of Delta Lake 0.3.0! Features include: Scala Java APIs for DML commands, Scala/Java APIs for query commit history, and Scala/Java APIs for vacuuming old files.

Delta Lake 0.2.0 Released

We are happy to announce the availability of Delta Lake 0.2.0! It brings support for cloud storage (e.g. Amazon S3 and Azure Blob Storage) and improved concurrency.

Delta Lake 0.1.0 Released