alamb commented on PR #6983:
URL: https://github.com/apache/arrow-rs/pull/6983#issuecomment-2591273695

   > The Stream and File formats are actually different formats... See 
https://arrow.apache.org/docs/format/Columnar.html#ipc-file-format
   
   Yes,  I am not sure if you are suggesting changes to this PR
   
   https://arrow.apache.org/docs/format/Columnar.html#ipc-file-format says:
   
   > IPC File Format
   > 
   > We define a “file format” supporting random access that is an extension of 
the stream format. The file starts and ends with a magic string ARROW1 (plus 
padding). What follows in the file is identical to the stream format. At the 
end of the file, we write a footer containing a redundant copy of the schema 
(which is a part of the streaming format) plus memory offsets and sizes for 
each of the data blocks in the file. This enables random access to any record 
batch in the file. See 
[File.fbs](https://github.com/apache/arrow/blob/main/format/File.fbs) for the 
precise details of the file footer.


-- 
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: github-unsubscr...@arrow.apache.org

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org

Reply via email to