# Overview
This PR implements the S3 upload manager under-the-hood of our
`datastore/s3` client's `Put()` method.
# Description
As surfaced by #31667, the current S3 implementation utilizes the `PUT`
operation which means services, such as MinIO, take issue with attempted
uploads that are [too
large](https://github.com/minio/minio/blob/master/cmd/streaming-signature-v4.go#L260).
The `PUT` operation can also present challenges in memory-constrained
environments as the entire upload target is read into memory before it's
shipped.
# Notes
- See the `TODO` comment section, there's more cool stuff we can and
should do with this in the future!
# Standard Pull Request Details
## Testing
- [x] QA'd all new/changed functionality manually
For unreleased bug fixes in a release candidate, one of:
- [x] Confirmed that the fix is not expected to adversely impact load
test results
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Signed-off-by: Illbjorn <am@hades.so>
41fd8409e9