New option to allow lower versions for replicas#67
Open
mszakami wants to merge 1 commit intopercona:masterfrom
Open
New option to allow lower versions for replicas#67mszakami wants to merge 1 commit intopercona:masterfrom
mszakami wants to merge 1 commit intopercona:masterfrom
Conversation
There may be a situation when one would need to be able to rearrange topology in such way thet server with higher version will be LEADER for REPLICA that has lower version. This patch allows that by introduction of AllowLowerVersionForReplication option which is turned off by default. Once enabled each time such change will be made, warning will be written into log file.
|
It should be noted that this type of operation is unsupported by MariaDB. https://mariadb.com/kb/en/replication-overview/#cross-version-replication-compatibility For anyone else coming along you should upgrade your replicas first, swap the primary to an upgraded server, then upgrade the previous primary. |
Contributor
|
Mentioning the linked Jira ticket: DISTMYSQL-562 |
kamil-holubicki
force-pushed
the
master
branch
2 times, most recently
from
d301f13 to
3b5b0f8
Compare
Contributor
|
Hi @mszakami , It will be merged via #86. I refactored and added tests to make maintenance easier. Please check. |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Description
There may be a situation when one would need to be able to rearrange topology in such way that server with higher version will be LEADER for REPLICA that has lower version. This patch allows that by introduction of AllowLowerVersionForReplication option which is turned off by default. Once enabled each time such change will be made, warning will be written into log file.