Important
Always upgrade to the latest stable revision of your release series.
MongoDB versioning has the form X.Y.Z where X.Y
refers to either a release series or development series and Z
refers to the revision/patch number.
If
Yis even,X.Yrefers to a release series; for example,4.0release series and4.2release series. Release series are stable and suitable for production.If
Yis odd,X.Yrefers to a development series; for example,4.1development series and4.3development series. Development series are for testing only and not for production.
For example, in MongoDB version 4.0.12, 4.0 refers to the
release series and .12 refers to the revision.
New Releases
Changes in the release series (e.g. 4.0 to 4.2) generally mark
the introduction of new features that may break backwards compatibility.
Patch Releases
Changes to the revision number (e.g. 4.0.11 to 4.0.12)
generally mark the release of bug fixes and backwards-compatible
changes.
Driver Versions
The version numbering system for MongoDB differs from the system used for the MongoDB drivers.