Increase SFTP chunk size to increase the SFTP throughput in both directions

[Jakuje]

SUMMARY

This is built on top of #638 so it depends on that change

Previously, the 1024b chunk was used, which resulted in large traffic overhead as each of the chunk needs to be wrapped in SFTP packet, as well as large overhead on high-latency links as the SFTP is now synchronous, waiting for every packet confirmation.

The libssh documentation recommends to use 16kB chunks, but using 32kB chunks should be safe as it still fits to the recommended limits in the SFTP specification. Using large reads could cause issues such as curl/curl#11804

ISSUE TYPE

• Bugfix Pull Request

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/ansible-pylibssh-664
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Jakuje]

The 🐍 3.9@macos-13 job is weird. It fails the first time (with some internal error -- not sure if we can do anything about that), but works on maximum verbosity ...