# sulfite
[](https://crates.io/crates/sulfite)
[](https://docs.rs/sulfite)
[](#license)
## Overview
`sulfite` is a high-level S3 client built on [AWS SDK for Rust](https://awslabs.github.io/aws-sdk-rust/) for even better ease of use, reliability, and bandwidth saturation (>50 Gbps).
*The name*: `SO3^2-`, an anion, implying a companion to some other cation (application), is commonly used as a preservative in wines and dried fruits (preserve to S3). It's `S3` with an `O` in the middle, a play on [oxidization](https://wiki.mozilla.org/Oxidation).
## Motivation
The AWS SDK is a little low-level for users to take advantage of the concurrency & parallelism, with the following challenges:
1. You need to orchestrate the parallel multipart download & upload for large files.
2. The built-in retry settings are too basic (limited to HTTP status codes, none for bytestream errors), and we allow installing higher-level retries.
3. The async API doesn't agree well with the filesystem for high-throughput operations, when it comes to streaming small chunks from/to disk.
To address them, we provide implementations for the parallel multipart download & upload, and higher-level retries. We also make sure the on-disk file is adequately buffered to avoid async-sync overhead.