The Mitaka OpenStack mid-cycle quarterly report

[This post is based on the executive summary of the 2015-Q5 OpenStack Community Activity Report, sponsored by the OpenStack Foundation]

The October-Devember 2015 penStack Community Activity Report shows a stable growth of the OpenStack Community. As new repositories and teams keep being added, the number of projects keeps growing. On the other hand it is worth mentioning the decrease in activity during the latest quarters in project teams such as Nova, or stabilization of some others, such as Horizon or Cinder. This is a clear signal of the maturity reached by the some of the project teams in the OpenStack Foundation.

Active Core Reviewers reach a new peak

Although Git activity (changesets merged in the code base) does not show a large increase of activity, if compared to Gerrit, the development effort in the project keeps increasing. This last quarter of 2015 the number of Active Core Reviewers reached a new record of 449 different developers.

Time to merge keeps decreasing

During the third quarter of 2015, a small increase in time to merge seemed to signal a change in trend. However, this last quarter of 2015 keeps the previous decreasing trend. During this period the median time to merge a changeset into master decreased from 2.91 days down to 2.38 days.

Efficiency closing tickets decreases

It is noticeable the decrease of the relative number of tickets closed in OpenStack projects (also known as the efficiency of the ticket closing process). Previous quarters topped at about 60% of closed tickets (with respect to tickets opened during the same period), while this quarter shows a much lower 44%. This could be seen as a poor performance indicator of the project teams.

However, the efficiency closing changesets in the review system (number of changesets merged or abandoned with respect to number of new changesets being proposed for review) remains stable at around 80%.

Efficiency analysis in the OpenStack community Liberty release

Liberty is the new release of OpenStack. This shows an increase in activity and people participating in the development of OpenStack.

  • There are 25,268 commits in total merged into master thanks to the work of 1,873 different developers.
  • In order to have that code into master, it was necessary the effort of 2,239 people that submitted at least one patchset to Gerrit. That means that 83% of them are actual contributors of Liberty release.
  • In terms of community, Launchpad activity shows that 9,919 people helped participating in the bug tracking process, opening, commenting and closing tickets.
  • The mailing lists are a busy channel of communication with 1,742 participants, but IRC seems to be the preferred channel with more than 6,000 detected nicknames.
  • is also an interesting communication channel where there have been 1,386 people participating and around 2,200 different questions.

As a disclaimer, this post will not focus on organizations participating in the OpenStack development, but in the software development process. Organizations information can be easily retrieved in the Activity Board. We believe that process in the OpenStack community is important and even more when we are talking about a team of more than 2,000 different contributors.

Efficiency of the community closing changesets

As mentioned, there have been more than 2,200 people in Liberty release that aimed at contributing with a patchset in the OpenStack community. And only a subset of those pieces of code were eligible to be part of the project and merged into master. However, not all of the people that were part of the that set were even reviewed. Each quarter, the community leaves around a 20% of the changesets population open. This can be observed in the following chart. The y-axis represents the percentage of changesets that were closed (abandoned or merged) per quarter (x-axis).

OpenStack_efficiencyclosingchangesets Continue reading