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We run two ProFTPD servers which provide load-balanced/fail-over SFTP/FTPS access to an s3fs-mounted partition.
During production operation (thousands of files, concurrent access patterns) we observe the following issues:
- s3fs C++ implementation contains memory leaks
- downloaded files via FTPS are sometimes empty/cropped
- versioned S3 buckets contain delete markers for every file uploaded
- directory listing via FTPS sometimes times out, same listing via SFTP doesn't
We are looking for a very experienced systems engineer who is interested in working on distributed systems, low-level optimizations and help us identify and solve the issues mentioned above.
A solution must include regression tests for the proposed bug fixes.
s3fs: [obscured] /p/s3fs/wiki/FuseOverAmazon
ProFTPD: [obscured] /
All software written for this project will be contributed back to s3fs/ProFTPD open source projects under GPL and can be mentioned as portfolio project.
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