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https://issues.apache.org/jira/browse/ARROW-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ji Liu updated ARROW-5224:
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Description:
There is no API to directly serialize/deserialize ValueVector. The only way to
implement this is to put a single FieldVector in VectorSchemaRoot and convert
it to ArrowRecordBatch, and the deserialize process is as well.
Provide a utility class to implement this may be better, I know all
serializations should follow IPC format so that data can be shared between
different Arrow implementations. But for users who only use Java API and want
to do some further optimization, this seem to be no problem and we could
provide them a more option.
This may take some benefits for Java user who only use ValueVector rather than
IPC series classes such as ArrowReordBatch:
* We could do some shuffle optimization such as compression and some encoding
algorithm for numerical type which could greatly improve performance.
* Do serialize/deserialize with the actual buffer size within vector since the
buffer size is power of 2 which is actually bigger than it really need.
* Reduce data conversion(VectorSchemaRoot, ArrowRecordBatch etc) to make it
user-friendly.
was:There is no API in MessageSerializer to directly serilize/deserialize
ValueVector. This feature is useful for user who only use ValueVectors rather
than ArrowRecordBatch.
> [Java] Add APIs for supporting directly serialize/deserialize ValueVector
> -------------------------------------------------------------------------
>
> Key: ARROW-5224
> URL: https://issues.apache.org/jira/browse/ARROW-5224
> Project: Apache Arrow
> Issue Type: Improvement
> Reporter: Ji Liu
> Assignee: Ji Liu
> Priority: Minor
>
> There is no API to directly serialize/deserialize ValueVector. The only way
> to implement this is to put a single FieldVector in VectorSchemaRoot and
> convert it to ArrowRecordBatch, and the deserialize process is as well.
> Provide a utility class to implement this may be better, I know all
> serializations should follow IPC format so that data can be shared between
> different Arrow implementations. But for users who only use Java API and want
> to do some further optimization, this seem to be no problem and we could
> provide them a more option.
> This may take some benefits for Java user who only use ValueVector rather
> than IPC series classes such as ArrowReordBatch:
> * We could do some shuffle optimization such as compression and some
> encoding algorithm for numerical type which could greatly improve performance.
> * Do serialize/deserialize with the actual buffer size within vector since
> the buffer size is power of 2 which is actually bigger than it really need.
> * Reduce data conversion(VectorSchemaRoot, ArrowRecordBatch etc) to make it
> user-friendly.
>
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