[
https://issues.apache.org/jira/browse/HIVE-25772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ASF GitHub Bot updated HIVE-25772:
----------------------------------
Labels: pull-request-available (was: )
> Use ClusteredWriter when writing to Iceberg tables
> --------------------------------------------------
>
> Key: HIVE-25772
> URL: https://issues.apache.org/jira/browse/HIVE-25772
> Project: Hive
> Issue Type: Improvement
> Reporter: Ádám Szita
> Assignee: Ádám Szita
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently Hive relies on PartitionedFanoutWriter to write records to Iceberg
> tables. This has a big disadvantage when it comes to writing many-many
> partitions, as it keeps a file handle open to each of the partitions.
> For some file systems like S3, there can be a big resource waste due to
> keeping bytebuffers for each of the handles, that may result in OOM scenarios.
> ClusteredWriter will only write one file at a time, and will not keep other
> file handles open, but it will expect that the input data is sorted by
> partition keys.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
