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What would you like to be improved?

The previous implementation performed a global scan on partitioned tables, which often caused OOM issues when handling large Iceberg tables. The main reasons are:

1. High memory consumption when a table contains a large number of files;
2. Loading too many column stats, especially from delete files
3. Lack of filtering on the tables that actually need to be processed.

How should we improve?

We propose a manifest-based, partition-aware data expiration approach:

• Identify candidate manifest files based on their partition boundaries and expire files that do not meet retention conditions;
• Iterate through manifest files sequentially to collect partition and file-level information;
• Perform expiration in a partition-by-partition manner, which allows submitting cleanup tasks per partition.

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Subtasks

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