topic Re: File optimization for delta table (versioning and snapshot ) in storage S3 in Data Engineering

File optimization for delta table (versioning and snapshot ) in storage S3

vinaykumar — Tue, 14 Feb 2023 07:14:19 GMT

Delta table generates new file for every insert or update on table and keep the old version files also for versioning and time travel history .

I have 1tb data as delta table and every 30 minutes , 90 percent data getting updated so file size will be getting increase exponentially .

Is there any way to optimize the storage size ( want to keep 1 week time travel history also)

Re: File optimization for delta table (versioning and snapshot ) in storage S3

Ajay-Pandey — Tue, 14 Feb 2023 08:38:11 GMT

Hi @vinay kumar ,

You can use partitionBy() to partition your data that's help you for data skipping and use vacuum to delete older history from delta tables.

Re: File optimization for delta table (versioning and snapshot ) in storage S3

vinaykumar — Tue, 14 Feb 2023 09:09:41 GMT

Yes , but partitionBy will help at some level to skip new file creation - but lets assume 90 percent data getting updated on every load and want to keep the time travel history also.

Re: File optimization for delta table (versioning and snapshot ) in storage S3

Anonymous — Tue, 21 Feb 2023 10:21:15 GMT

Hi @vinay kumar

Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help.

We'd love to hear from you.

Thanks!