Qian Xu created SQOOP-1588:
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Summary: TO-side: Write data to HDFS
Key: SQOOP-1588
URL: https://issues.apache.org/jira/browse/SQOOP-1588
Project: Sqoop
Issue Type: Sub-task
Reporter: Qian Xu
Assignee: Qian Xu
Create a basic Kite connector that can write data (i.e. from a jdbc connection)
to HDFS.
The scope is defined as follows:
- Destination: HDFS
- File Format: Avro Parquet and CSV.
- Compression Codec: Use default
- Partitioner Strategy: Not supported
- Column Mapping: Not supported
Exposed Configuration:
- [Link] File Format (Enum)
- [To] Dataset URI (String, has a validation check)
Workflow:
- Create a link to Kite Connector
- Create a job with valid configuration (see above)
- Start a job
- {{KiteToInitializer}} will check dataset existence
- Sqoop will create N {{KiteLoader}} instances.
- {{KiteLoader}} will create an Avro schema regarding the FROM-schema (sorry,
at runtime). As Schema types are not identical to Avro types, a type mapping
will happen in place. Original Sqoop type will be described in the Avro schema,
which can be used for reversed type mapping for data export.
- {{KiteLoader}} will create a temporary dataset and writes allocated data
records to it. In case of any error, the dataset will be deleted.
- {{KiteToDestroy}} will merge all temporary datasets to be one dataset.
Further features will be implemented in follow-up JIRAs.
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