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https://issues.apache.org/jira/browse/IMPALA-14564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-14564 started by Noémi Pap-Takács.
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> Remove redundant partition information from Iceberg file descriptors
> ---------------------------------------------------------------------
>
> Key: IMPALA-14564
> URL: https://issues.apache.org/jira/browse/IMPALA-14564
> Project: IMPALA
> Issue Type: Improvement
> Components: Catalog, Frontend
> Reporter: Noémi Pap-Takács
> Assignee: Noémi Pap-Takács
> Priority: Major
> Labels: impala-iceberg
>
> File descriptors store the partition information (spec id and partition
> keys). Depending on the partitioning, partition keys can consist of many
> string fields corresponding to the partition values. Storing these keys
> redundantly for each file descriptor object adds a large overhead both to
> catalogd's memory and to the serialized data
> (TIcebergTable.TIcebergContentFileStore) that the Catalog sends to the
> Coordinator.
> Removing the partition info from file descriptors could significantly reduce
> their size.
> The partition keys could be stored in a map (id - partition info) that gets
> sent along with the file descriptors and the values could be looked up using
> an id for each partition.
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