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4.4-downgrade.txt
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4.4-downgrade.txt
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======================================
Downgrade |newversion| to |oldversion|
======================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
.. include:: /includes/4.4-upgrade-replacements.rst
The following page summarizes various considerations for downgrading to
|oldversion|. For specific instructions for your deployment type, see:
- :doc:`/release-notes/4.4-downgrade-standalone`.
- :doc:`/release-notes/4.4-downgrade-replica-set`.
- :doc:`/release-notes/4.4-downgrade-sharded-cluster`.
Downgrade Path
--------------
.. include:: /includes/downgrade-path.rst
.. include:: /includes/downgrade/single-version-support.rst
.. include:: /includes/extracts/4.4-changes-downgrade-floor.rst
.. |downgrading| replace:: downgrading
Create Backup
-------------
*Optional but Recommended.* Create a backup of your database.
Downgrade Feature Compatibility Version (fCV)
---------------------------------------------
Before downgrading the binaries, you must downgrade the
``featureCompatibilityVersion`` (fCV) to |oldfcv|.
.. _4.4-downgrade-features-prereq:
Remove Backwards Incompatible Features
---------------------------------------
Before downgrading the binaries, remove all persisted 4.4 features that
are incompatible with 4.2.
Procedures
----------
- :doc:`/release-notes/4.4-downgrade-standalone`.
- :doc:`/release-notes/4.4-downgrade-replica-set`.
- :doc:`/release-notes/4.4-downgrade-sharded-cluster`.
.. toctree::
:titlesonly:
:hidden:
/release-notes/4.4-downgrade-standalone
/release-notes/4.4-downgrade-replica-set
/release-notes/4.4-downgrade-sharded-cluster