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API stability

This library offers Go API bindings for ceph libraries and interfaces. In order to provide a stable exported API and at the same time be able to get early feedback for new and possibly immature API designs, we maintain three levels of API stability:

Stable

This is the default level. Everything that is exported and not annotated otherwise is considered stable. As long as we release 0.x versions, this is still no 100% guarantee, but we try to avoid breaking changes as much as possible. Once we reached version 1.x, this level provides a guarantee that no breaking changes will be introduced until the next major release, as it is convention in the Go community.

Deprecated

This is a level for APIs that should not be used for new code. These are marked as deprecated according to Go conventions in the documentation (that is, a paragraph beginning with Deprecated:). During 0.x releases these APIs might get removed in a future release, especially the 1.0 release, so we recommend refactoring the code at the earliest convenience. After the 1.0 release, deprecated APIs will not be removed, however they are still deprecated and only in maintenance mode. We usually don't make improvements for these APIs and we can't guarantee optimal performance.

Preview

This is a level for APIs that are fresh and might need further refinements in following releases. These are not included in the documentation and are only available, if the build tag ceph_preview is set. There might be breaking changes in future releases regarding preview APIs. Usually new exported APIs are introduced with this level first and become stable when there were no major changes to the API for two releases. The schedule for preview APIs becoming stable is tracked in a separate document.

Please note that while these APIs are still considered "unstable", this is not true for the quality of their implementations, which we regard as stable and error free, at least with the quality of beta code. Therefore we highly encourage the use of these APIs and providing feedback to us, if a possible breaking change in the API in future releases is feasible for your project.