Dear MySQL users,

MySQL Connector/NET 6.10.9 is the fifth GA release with .NET Core
now supporting various connection-string options and MySQL 8.0 server
features.

MySQL Connector/NET 6.10.9 is the final release in the 6.10 series.

To download MySQL Connector/NET 6.10.9 GA, see the “Generally Available
(GA) Releases” tab at
http://dev.mysql.com/downloads/connector/net/

Changes in MySQL Connector/NET 6.10.9 (2019-07-29, General Availability)


     * Functionality Added or Changed

     * Bugs Fixed

Functionality Added or Changed


     * Connector/NET now supports IPV6 connections made using
       the classic …

Overview The Skinny

Database Proxies provide a single entry point into MySQL for the calling client applications.

Proxies are wonderful tools to handle various situations like a master role switch to another node for maintenance, or for transparency with read and write connections.

However, when the time comes to perform the switch action, all of the calling clients have been funneled through the proxy, so identification of the calling host from the database itself becomes difficult.

The Problem What is going on?

Let’s illustrate how not knowing the source of a client connection can be an issue for the database administrator…

In the following diagram, three client applications connect to a Tungsten Cluster via the Connector proxy:

…

FromDual has the pleasure to announce the release of the new version 2.2.0 of its popular Backup and Recovery Manager for MariaDB and MySQL (brman).

The new FromDual Backup and Recovery Manager can be downloaded from here. The FromDual Repositories were updated. How to install and use the Backup and Recovery Manager is describe in FromDual Backup and Recovery Manager (brman) installation guide.

In the inconceivable case that you find a bug in the FromDual Backup and Recovery Manager please report it to the FromDual Bugtracker or just send us an …

When we explore strategies to scale our MySQL-based database layer, we realize that there are many different options. As opposed to proprietary solutions, open-source products nourish themselves from their communities and novel architectures or enhanced versions are generated, often incorporating other open source technologies. MySQL is not an exception.

Other players build completely different engines aiming to mitigate some of MySQL well-known weaknesses, but still support its wire protocol, with the challenge of sacrificing as little compatibility as possible.

In this white paper, we briefly discuss the scale-up vs scale-out dilemma, to then review the different scale-out strategies. We are also going to go over some of the most common MySQL architectures and products with horizontal scaling in mind.

Finally, we will share some guidelines to …

Sommerferien-Zeit – für all die Daheimgebliebenen dürfte es jetzt hoffentlich etwas ruhiger zu und her gehen. Zeit für eine Weiterbildung? Es bleibt nicht mehr viel Zeit, das Jahres-Schulungs-Budget aufzubrauchen!

Vom 19. bis 23. August führt FromDual wieder einmal die Schulung MariaDB und MySQL für Fortgeschrittene in Köln durch. Siehe auch unsere Schulungstermine.

Es hat noch Plätze frei! Anmelden kann man sich direkt bei unserem Schulungs-Partner, der GFU Cyrus AG.

Diese MariaDB/MySQL Weiterbildung richtet sich …

Sometimes, the MySQL Optimizer chooses a wrong plan, and a query that should execute in less than 0.1 second ends-up running for 12 minutes !  This is not a new problem: bugs about this can be traced back to 2014, and a blog post on this subject was published in 2015.  But even if this is old news, because this problem recently came yet again to my attention, and because this is still not fixed in MySQL 5.7 and 8.0, this is a subject worth writing about.

The MySQL Optimizer

Before looking at the problematic query, we have to say a few words about the optimizer.  The Query Optimizer is the part of query execution that chooses the query plan.  A Query Execution Plan is the way MySQL chooses to execute a specific query.  It …

The usage of this clone plugin is so much helpful to bring new MySQL instance to live.

Usage can go with New Replica (as in MySQL Replication), or we can easily create New Node in MySQL InnoDB Cluster.  or we can provision a New MySQL Instance for Testing or Troubleshooting.  or we need the New Instance with data for snapshot query.

Many useful links have been posted in the recent week(s).   

Please check the URL with the details.   This CLONE feature is the **NEW** super star add-on to the MySQL today.

Usage :

https://lefred.be/content/mysql-innodb-cluster-from-scratch-even-more-easy-since-8-0-17/

https://lefred.be/content/create-an-asynchronous-mysql-replica-in-5-minutes/

https://mysqlandmore.blogspot.com/2019/07/mysql-8017-release-and-clone-plugin.html


…

Very good, practical, and precise info! However, you could use some code prettifier to highlight the commands. Currently, there seems no delimitation between the text and code.

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This tutorial explains MySQL ORDER BY clause and its usage with both the ASC and DESC options. We’ll describe this MySQL statement with the help of simple examples. 1. ORDER BY Clause Syntax 2. ORDER BY W/O ASC or DESC 3. ORDER BY DESC 4. ORDER BY Relative Position 5. ORDER BY Two Fields ASC & DESC Let’s now go through each of the section one by one. MySQL ORDER BY Clause The MySQL SELECT command doesn’t return a sorted result set by default. Hence, to sort the output, you have to append the ORDER BY clause in the SELECT

The post MySQL ORDER BY with Simple Examples appeared first on Learn Programming and Software Testing.

MariaDB 10.4 has being declared GA, and few presentations on Galera4 in the last conferences were hold.

So, I thought, it is time to give it a try and see what is going on.

It is not a secret that I consider the Codership guys my heroes, and that I have push for Galera as solid and very flexible HA solution, for many years.

Given that my first comment is that it was a shame to have Galera4 available only in MariaDB, I would have preferred to test the MySQL vanilla version for many reasons, but mainly because the MySQL/Oracle is and remain the official and main line of the MySQL software, you like it or not, and as such I want to see how the Galera4 behave with that. Anyhow Codership state that the other versions will be out AFTER the summer, and I hope this will be true.

To test the new version given I do not have the vanilla MySQL, I decide to use the other distribution coming from Percona. At the end the test …