feefladder opened a new issue, #6647: URL: https://github.com/apache/arrow-rs/issues/6647
**Which part is this question about** Alignment of returned `Bytes` from `object_store.get_range()` or `object_store.get_ranges` **Describe your question** Are there any alignment guarantees for `get_range`, or would that be a feature that could be added? **Additional context** I want to use `object_store` as a possible io for a [crate I'm working on](https://github.com/feefladder/tiff2). Now, ideally, I'd be directly using the provided `Bytes` from the `get_range(s)` function. That needs two things: 1. Alignment of the result is >= alignment of the underlying type (8-byte at most) 2. We can convert to a `BytesMut` e.g. Does `object_store` hold any other references to the byte struct? [this](https://github.com/apache/arrow-rs/blob/7bcc1ad988498def843180c6a4c95f9732f31a4b/object_store/src/util.rs#L53) seems to be the relevant code here. Bytes [tests for misalignments](https://github.com/tokio-rs/bytes/pull/346/files#diff-59a7c57d16e92b38766e932c25b74855e4be427436d609fbd2e0a7592284eac9) I know the upstream issues (tokio-rs/bytes/#437 tokio-rs/bytes/#343) and that [zero-copy works for arrow-rs](https://github.com/apache/arrow-rs/pull/4260), which makes me think that alignment is at least somewhat worked out? To me, a solution I'm thinking of is to get a large allocation, check the alignment of that and then hand out aligned chunks of that allocation. Since that would be upstream of the `object_store` crate (it produces the `Bytes` for the result), I'm asking here if there are any alignment guarantees of the `get_range(s)` function. If so, I'm happy and would only need to implement alignment-ness for other types. -- 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]
