On: Delta Lake vs. Parquet: A Comparison

[MrPowers]

Data Lakes (i.e. Parquet files in storage without a metadata layer) don't support transactions, require expensive file listing operations, and don't support basic DML operations like deleting rows.

Delta Lake stores data in Parquet files and adds a metadata layer to provide support for ACID transactions, schema enforcement, versioned data, and full DML support. Delta Lake also offers concurrency protection.

This post explains all the features offered by Delta Lake in comparison to a plain vanilla Parquet data lake.

[alexmolas → MrPowers]

Please, stop using LLM to provide post summaries. This comment is not adding value to the conversation.

[MrPowers → alexmolas]

I actually wrote this. I thought it was going to be part of the post description and didn't realize it was going to be a comment.

[alexmolas → MrPowers]

Sorry if my comment sound too harsh. I've noticed a lot of people commenting autogenerated summaries of the posts, trying to farm karma I guess.