Balaji Varadarajan created HUDI-1212:
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Summary: GDPR: Support deletions of records on all versions of
Hudi dataset
Key: HUDI-1212
URL: https://issues.apache.org/jira/browse/HUDI-1212
Project: Apache Hudi
Issue Type: Improvement
Components: Incremental Pull, Writer Core
Reporter: Balaji Varadarajan
Fix For: 0.6.1
Incremental Pull should also stop returning the record on historical datset
when we delete them from latest snapshot.
Context from Mailing list email :
Hello,
I am Siva's colleague and I am working on the problem below as well.
I would like to describe what we are trying to achieve with Hudi as well as our
current way of working and our GDPR and "Right To Be Forgotten " compliance
policies.
Our requirements :
- We wish to apply a strict interpretation of the RTBF. In other words, when
we remove a person's data, it should be throughout the historical data and not
just the latest snapshot.
- We wish to use Hudi to reduce our storage requirements using upserts and
don't want to have duplicates between commits.
- We wish to retain history for persons who have not requested to be forgotten
and therefore we do not want to delete commit files from the history as some
have proposed.
We have tried a couple of solutions, but so far without success :
- replay the data omitting the data of the persons who have requested to be
forgotten. We wanted to manipulate the commit times to rebuild the history.
We found that we couldn't manipulate the commit times and retain the history.
- replay the data omitting the data of the persons who have requested to be
forgotten, but writing to a date-based partition folder using the
"partitionpath" parameter.
We found that commits using upserts between the partitionpath folders, do not
ignore data that is unchanged between 2 commit dates as when using the default
commit file system, so we will not save on our storage or speed up our
processing using this technique.
So basically we would like to find a way to apply a strict RTBF, GDPR, maintain
history and time-travel (large history) and save storage space using Hudi.
Can anyone see a way to achieve this?
Kind Regards,
David Rosalia
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