Merge branch 'planning' into 'main'

draft meeting minutes for iteration planning

See merge request obnam/obnam.org!72

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+[[!meta title="Iteration planning: April 17 – May 1"]]
+[[!meta date="Sun, 17 Apr 2022 09:43:42 +0300"]]
+[[!tag meeting]]
+
+[[!toc levels=2]]
+
+# Assessment of the iteration that has ended
+
+[previous iteration]: /blog/2022/04/03/planning
+
+The goal of the [previous iteration][] was:
+
+> The goal for this iteration is to further improve our ability to make
+> changes to Obnam safely.
+
+What an non-specific goal. In any case, it was achieved: that's the
+nice part of not being specific. Lars changed Obnam to allow it to
+migrate to another checksum algorithm for chunks and de-duplication
+without breaking existing users. This is [[!issue 203]], and done in
+[[!mr 228]], not yet merged.
+
+# Discussion
+
+## Current development theme
+
+The current theme of development for Obnam is **convenience**. The choices
+are performance, security, convenience, and tidy-up, at least
+currently.
+
+# Repository review
+
+Lars reviewed all the open issues, merge requests, and CI pipelines
+for all the projects in the Obnam group on gitlab.com.
+
+## [Container Images](https://gitlab.com/obnam/container-image)
+
+* Open issues: 0
+* Merge requests: 0
+* Additional branches: 0
+* CI: OK, ran on Monday, April 11
+
+## [obnam.org](https://gitlab.com/obnam/obnam.org)
+
+* Open issues: 0
+* Merge requests: 0
+* Additional branches: 0
+* CI: not defined
+
+## [obnam-benchmark](https://gitlab.com/obnam/obnam-benchmark)
+
+* Open issues: 11
+* Merge requests: 0
+* Additional branches: 0
+* CI: not defined
+
+## [cachedir](https://gitlab.com/obnam/cachedir)
+
+* Open issues: 0
+* Merge requests: 0
+* Additional branches: 0
+* CI: not defined
+
+## [summain](https://gitlab.com/obnam/summain)
+
+* Open issues: 0
+* Merge requests: 0
+* Additional branches: 0
+* CI: not defined
+
+## [obnam](https://gitlab.com/obnam/obnam)
+
+* Open issues: 54
+* Merge requests: 1
+  - [[!mr 228]] - _add support for migrating to new checksum types_
+    - to be merged on Tuesday
+* Additional branches: 1
+  - `perf-stats` -- obsolete, deleted during meeting
+* CI: OK
+
+# Goals
+
+## Goal for 1.0 (not changed this iteration)
+
+The goal for version 1.0 is for Obnam to be an utterly boring backup
+solution for Linux command line users. It should just work, be
+performant, secure, and well-documented.
+
+It is not a goal for version 1.0 to have been ported to other
+operating systems, but if there are volunteers to do that, and to
+commit to supporting their port, ports will be welcome.
+
+Other user interfaces is likely to happen only after 1.0.
+
+The server component will support multiple clients in a way that
+doesn’t let them see each other’s data. It is not a goal for clients
+to be able to share data, even if the clients trust each other.
+
+## Goal for the next few iterations (not changed for this iteration)
+
+The goal for next few iterations is to have Obnam be easier and safer
+to change, both for developers and end users. This means that
+developers need to be able to make breaking changes without users
+having to suffer. User shall be able to migrate their data, when they
+feel it worthwhile, not just because there is a new version.
+
+## Goal for this iteration (new for this iteration)
+
+The goal of this iteration is to prepare for future changes: document
+threats against the chunk server API (so that authentication can be
+added in the future), and making an client-internal abstraction for
+using the chunk store (so that it can later be local as well as
+remote).
+
+
+# Commitments for this iteration
+
+Lars intends to work on the following issues:
+
+* [[!issue 29]] -- _Doesn't provide information on SQLite file sizes_
+  - Lars will add that functionality to the Obnam client
+  - 1h
+* [[!issue 188]] -- _May store large unsigned numbers incorrectly in SQLite?_
+  - Lars will add a test to verify that the biggest 64-bit number can
+    be stored in SQLite and correctly retrieved back.
+  - 1h
+* [[!issue 190]] -- _obnam.md doesn't explain why we back up
+  CACHEDIR.TAG files_
+  - Lars will amend the documentation in the subplot
+  - 0.25h
+* [[!issue 206]] -- _Lacks a release with recent changes_
+  - Lars will make a release and run benchmarks.
+  - 1h
+* [[!issue 207]] -- _What threats would a server API authentication
+  defend against?_
+  - Lars to add an initial threat model for server API. This needs to
+    be done before it's sensible to discuss how authentication would
+    be implemented.
+  - 1h
+* [[!issue 208]] -- _Needs internal interface for using chunk storage_
+  - Lars to add an internal interface and implement it for a remote
+    chunk store.
+  - 4h
+
+
+# Meeting participants
+
+* Lars Wirzenius