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Converting Asynchronous Replication into Group Replication (Doc ID 2453078.1)

Last updated on MAY 07, 2021

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.


Disclaimer: Starting from v8.0, some terms have been deprecated. Older releases will only use the deprecated terminology, and new releases will only use new terminology. Please see for a complete list of those changes, and in which minor versions it happened.

This article answers common questions that can appear when existing replication topology needs to be used to create a new Group Replication group.

Questions and Answers

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In this Document
Questions and Answers
 Q1. Can two instances with replication channel running between them be added to a group?
 Q2. Can an old replica be added to the group, if it was behind source and don't have some transactions compared to nodes that are already in the group?
 Q3. What can be done, if old source don't have binary logs with missing transactions?
 Q4. What can be done if instance that needs to be included in the group has additional transactions, compared to other instances that are already in the group?
 Q5. I have old source with extra transactions that I want to add to the group by creating temporary asynchronous replication channel to the group. How should this be done?

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