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ObjectStorageLocationGenerator

iceberg::writer::file_writer::location_generator

Struct ObjectStorageLocationGenerator 

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pub struct ObjectStorageLocationGenerator { /* private fields */ }
Expand description

ObjectStorageLocationGenerator injects hash entropy into generated file locations so that files are spread across many object-store prefixes.

Object stores such as S3 shard request throughput by key prefix, so writing every file under a common .../data/ prefix creates a throughput hotspot. This generator prepends a deterministic, hashed directory tree (derived from the file name) to each location, mirroring Java Iceberg’s ObjectStoreLocationProvider.

The behavior is controlled by these table properties:

  • write.data.path / write.object-storage.path / write.folder-storage.path - the base data location (checked in that order), defaulting to {table_location}/data.
  • write.object-storage.partitioned-paths - whether partition values are included in the path (defaults to true).

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impl ObjectStorageLocationGenerator

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pub fn new(table_metadata: &TableMetadata) -> Result<Self>

Create a new ObjectStorageLocationGenerator from table metadata. Resolve the base data location from table properties, falling back to {table_location}/data.

Precedence follows Java Iceberg: write.data.path first, then the deprecated write.object-storage.path and write.folder-storage.path properties, and finally the default {table_location}/data.

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impl Clone for ObjectStorageLocationGenerator

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fn clone(&self) -> ObjectStorageLocationGenerator

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ObjectStorageLocationGenerator

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl LocationGenerator for ObjectStorageLocationGenerator

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fn generate_location( &self, partition_key: Option<&PartitionKey>, file_name: &str, ) -> String

Generate an absolute path for the given file name that includes the partition path. Read more

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