Update: Percona XtraBackup 8.0.12 now supports backup and restore processing for versions of MySQL 8.x; previous versions of Percona XtraBackup will not work with MySQL 8.0.20 and higher. More information

On Monday, April 27, 2020, Oracle released the highly anticipated 8.0.20 version of the MySQL database server. This release contains changes to the InnoDB redo log format which breaks compatibility with all currently released versions of the Percona XtraBackup 8.x series.

At this time, there are no known workarounds that will allow any version of Percona XtraBackup 8.x to function properly with MySQL 8.0.20.

We have identified the specific cause of the issue and diligently working towards a new release that will safely solve this issue as soon as possible.

Thank you for your …

In this blog post I would like to give an overview of the most common failover scenarios and operations when using MySQL Group Replication 8.0.19 (aka GR) and Percona XtraDB Cluster 8 (PXC) (which is based on Galera), and explain how each technology handles each situation. I have created a three-node cluster with Group Replication using a single Primary and a three-node PXC, both with default settings. I am also going to use ProxySQL to interface with both clusters.

In both clusters, the name of the nodes are mysql1, mysql2,  and mysql3. In Group Replication the Primary node is where the writes go if we are using single primary configuration. In PXC, I will use the same term as well and will call the node Primary where I am sending the writes. Just to note, in PXC there is no concept of primary node, …

The MySQL Development team is proud to announce version 8.0.20 of the MySQL Shell, with the following features:

• Admin API
  • Improvements on the admin account handling for MySQL InnoDB cluster and MySQL InnoDB ReplicaSet as well as for MySQL Router
  • Command line integration for MySQL InnoDB ReplicaSet
  • Isolation of InnoDB ReplicaSet operations
• Connection compression options.

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As you know, today, MySQL 8.0.20 has been released. I started this new thread category with 8.0.19 (see this post).

A late thanks to Guoji Ma, for a contribution to bug #95801 “show create table output can’t be executed” that was used as inspiration for the actual fix that was pushed in MySQL 8.0.18.

MySQL 8.0.20, includes contributions from Daniel Black, Cai Yibo, Jericho Rivera, Matti Sillanpää, Nick Pollett, Bruce Feng, Kamil Holubicky, Facebook.

Thank you all for your great contributions. MySQL is an Open Source project, GPL, and we accept contribution of course. Sometimes it’s also good to remind it

Here is the list of the contributions above:

• Impossible WHERE for a!=a, a<a, …

MySQL provides password-reuse capability, which allows database administrators to determine the number of unique passwords a user must use before they can use an old password again.

The post MySQL Security - Password Reuse Policy first appeared on dasini.net - Diary of a MySQL expert.

Dear MySQL users,

MySQL Connector/Python 8.0.20 is the latest GA release version of the
MySQL Connector Python 8.0 series. The X DevAPI enables application
developers to write code that combines the strengths of the relational
and document models using a modern, NoSQL-like syntax that does not
assume previous experience writing traditional SQL.

To learn more about how to write applications using the X DevAPI, see

  http://dev.mysql.com/doc/x-devapi-userguide/en/

…

Dear MySQL users,

MySQL Connector/C++ 8.0.20 is a new release version of the MySQL
Connector/C++ 8.0 series.

Connector/C++ 8.0 can be used to access MySQL implementing Document
Store or in a traditional way, using SQL queries. It allows writing
both C++ and plain C applications using X DevAPI and X DevAPI for C.
It also supports the legacy API of Connector/C++ 1.1 based on JDBC4.

To learn more about how to write applications using X DevAPI, see
“X DevAPI User Guide” at

…

The MySQL Development team is very happy to announce that MySQL 8.0.20 is now available for download at dev.mysql.com. In addition to bug fixes there are a few new features added in this release.  Please download 8.0.20 from dev.mysql.com or from the MySQL  Yum,  APT, or SUSE repositories.…

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Dear MySQL users,

MySQL Connector/J 8.0.20 is the latest General Availability release of
the MySQL Connector/J 8.0 series.  It is suitable for use with MySQL
Server versions 8.0, 5.7, and 5.6.  It supports the Java Database
Connectivity (JDBC) 4.2 API, and implements the X DevAPI.

This release includes the following new features and changes, also
described in more detail on

https://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news-8-0-20.html

As always, we recommend that you check the “CHANGES” file in the
download archive to be aware of changes in behavior that might affect
your application.

To download MySQL Connector/J 8.0.20 GA, see the “General Availability
(GA) Releases” tab at …

During this joint webinar our speakers, Alkin Tezuysal, Technical Expert at Percona and Sugu Sougoumarane, Co-Founder and CTO at PlanetScale, will provide attendees with hands-on experience using Vitess using Kubernetes. They will start by providing a quick overview of Vitess – including key concepts and terminology, and then describe the deployment options for both in Kubernetes.

The hands-on exercises will cover many of the key workflows with running a sharded system:

– Moving from an unsharded system to a vertical split one (moving some tables to a different host)
– Sharding large tables across several instances
– Backups, Recoveries, and failovers (both planned and unplanned).

Attendees are not expected to have any prior experience with Vitess but will find it useful if they have prior experience completing these tasks in a MySQL environment and general know-how …