tustvold commented on code in PR #53: URL: https://github.com/apache/parquet-site/pull/53#discussion_r1582882267
########## content/en/docs/Overview/_index.md: ########## @@ -7,3 +7,30 @@ description: > --- Apache Parquet is a columnar storage format available to any project in the Hadoop ecosystem, regardless of the choice of data processing framework, data model or programming language. + +This documentation contains information about both the [parquet-mr](https://github.com/apache/parquet-mr) and [parquet-format](https://github.com/apache/parquet-format) projects. + + +### Parquet Format + +The "Parquet Format" project hosts the official specification of the Parquet file format, defining how data is structured and stored. This specification, along with Thrift metadata definitions and other crucial components, is essential for developers to effectively read and write Parquet files. The parquet-format project specifically contains the format specifications needed to understand and properly utilize Parquet files. + +As a repository focused on specification, the parquet-format repository does not contain source code. + + +### Parquet MR + +The parquet-mr GitHub repository is part of the Apache Parquet project and specifically focuses on providing Java tools for handling the Parquet file format within the Hadoop ecosystem. Essentially, this repository includes all the necessary Java libraries and modules that allow developers to read and write Parquet files. + + Parquet MR can be thought of the a "reference" implementation of parquet-format. There are a number of other Parquet Format implementations, such as [parquet-cpp](https://github.com/apache/parquet-cpp) and [parquet rust](https://github.com/apache/arrow-rs/blob/master/parquet/README.md). Review Comment: Is parquet-mr actually the reference implementation, or would implementation in say parquet-cpp and parquet-rs be sufficient for standardisation of a feature? Are there already examples of this? Perhaps page indices which I believe were first implemented as part of Impala? Perhaps it is beyond the scope of this issue, but I think the relationship between parquet-mr and parquet the specification is at the core of this issue, and the broader governance ambiguity surrounding parquet. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
