In this blog, I explain how to recover from a replication failure caused by a corrupted relay log file.

MySQL replica stores data received from its source binary log in the relay log file. This file could be corrupted due to various reasons, mostly hardware failures. If this happens, replication will stop working, and the error log on the replica will have entries similar to:

2022-05-12T12:32:07.282374Z 2 [ERROR] Error in Log_event::read_log_event(): 'Event too small', data_len: 0, event_type: 0
2022-05-12T12:32:07.282386Z 2 [ERROR] Error reading relay log event for channel '': slave SQL thread aborted because of I/O
...
2022-05-12T12:32:07.282396Z 2 [ERROR] Slave SQL for channel '': Relay log read failure: Could not parse relay log event entry. The possible reasons are: the master's binary log is corrupted (you can check this by running 'mysqlbinlog' on the binary log), the slave's relay log is corrupted (you can check this by running …

Introduction This is the fourth in a series of blogs that detail how to setup and use a LAMP Stack that makes use of MySQL HeatWave in the Oracle Cloud.   Predicates for completing the tasks in this blog You will need to have completed Parts 2 and 3 of this series of blogs. You […]

Introduction This is the third in a series of blogs that detail how to setup and use a LAMP Stack that makes use of MySQL HeatWave in the Oracle Cloud.   Predicates for completing the tasks in this blog You will need to have completed Part 2 of this series of blogs and gathered the […]

Introduction This is the second in a series of blogs that detail how to setup and use a LAMP Stack that makes use of MySQL HeatWave in the Oracle Cloud.   This blog will start to implement the architectural vision discussed in part 1 by detailing the steps necessary to build the infrastructure.   Using […]

Usually, I receive a lot of emails, and sometimes I read them on my phone and then… I forgot about them.. (shame on me).

On my Linux desktop, I used to use Get Things Gnome for a long time, due to the declining appeal of the project and the end of the extension for Thunderbird, I found it less and less useful.

I was then looking for a solution to have my todolist accessible from everywhere and that I could manage it myself, not hosted somewhere.

I found a very nice, fast and practical project that was easy to deploy and was using MySQL as backend: myTinyTodo.

However, I was missing the possibility to easily create a new task from an email (and especially on my phone).

This is why I decided to write a script that would perform exactly what I was looking for and integrated …

Oracle’s MySQL 8.0.29 release extended the support for ALTER TABLE … ALGORITHM=INSTANT to 1) allow users to instantly add columns in any position of the table, and 2) instantly drop columns. As part of this work, the InnoDB redo log format has changed for all DML operations on the server. This new redo log format introduced a design flaw that can cause data corruption for tables with INSTANT ADD/DROP COLUMNS.

The corruption happens when InnoDB crash recovery takes place. InnoDB applies redo logs at startup. Percona XtraBackup copies the redo log during backup and applies it as part of the –prepare step to bring the backup to a consistent state.

Percona fixed the corruption issue and several other issues with the INSTANT ADD/DROP column …

Introduction This is the first in a series of blogs that detail how to setup and use a LAMP Stack that makes use of MySQL HeatWave in the Oracle Cloud. Part 1 (this part) will set the scene by detailing what a LAMP stack is and what deployment options are available in the Oracle Cloud. […]

Do you know what time it is? It’s time for your weekly media resource on all things MySQL, PHP, and LAMP stack! Like I always say, I hope you enjoy this issue of OpenLampTech as much as I did! Thank you for reading and please share the OpenLampTech publication with others!

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

This week in OpenLampTech issue #35, we are looking at articles covering:

• MySQL Joins
• PHP logical operators
• Linux sudo vs su
• A nice Laravel dev environment
…

During the last 20 years MySQL has democratized the usage of transactional databases.
Now with MySQL HeatWave we are in the process of democratizing Analytics and Machine Learning.

With MySQL HeatWave,
valorizing your data has never been so easy!

In this article I will show you how easy it is to use the Machine Learning capabilities of MySQL HeatWave. We will use the famous Iris dataset and we’re going to build, train, deploy and explain a machine learning model within MySQL HeatWave using Apache Zeppelin.

The post Iris Data Set with MySQL HeatWave Machine Learning & Zeppelin first appeared on dasini.net - Diary of a MySQL expert.

MySQL Router with InnoDB Cluster allows transparent routing access for application to backend MySQL Servers.  

Restful API (Http access) feature was added to MySQL Router since 8.0.17.

This article is written to provide a tutorial with Router Restful API.   It is tested with MySQL 8.0.29 release.

Setup& Assumptions

1. MySQL InnoDB Cluster 8.0.29 - Cluster Name as 'mycluster'

2. Linux OS with MySQL Shell 8.0.29 installed

3. Restful API User : 'myapiuser'

Router Configuration

Bootstrap is the process to create the Router configuration setup.   

e.g.

$> mysqlrouter --bootstrap admin:adminPassword@node1:node1Port --directory /tmp/myrouter --account routerfriend …