Author: Anel Husakovic
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Migration with Docker Official Images
In this blog we will explore how to setup a docker compose file in order to migrate from MySQL 5.7 to the latest MariaDB.
In the next blog we will explain how to setup a docker compose file to migrate from MySQL 8.0 to MariaDB.
The steps to migrate from MySQL 5.7 to MariaDB are:
Let’s explore each step.
1. Start MySQL
The MySQL container is started using the following docker-compose file.
2. Use MySQL data directory and start MariaDB […]
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MariaDB semi-sync replication using containers
In the blog MariaDB replication using containers, we showed how to properly replicate data in MariaDB using Docker containers.We used standard or asynchronous or lazy replication.
The problem with this type of replication is potential data loss if the primary goes down. Transactions that are committed on the primary are not being sent to replicas, and the replica doesn’t commit the changes. Failover from primary to replica in this case may lead to missing transactions relative to the primary.
To […]
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Connect SE JDBC table type: Accessing Tables From Another DBMS
In this blog we will show how to access MySQL and MariaDB DBMS tables from MariaDB Server. For that we will use Connect Storage Engine (SE), which supports different table types options. In this case we will use the JDBC table type. To use the JDBC table type we need to specify it in the CREATE TABLE definition for Connect SE and we need the Java connector for the DBMS we are accessing. For demonstration purposes we will use containers, […]
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Data migration from Oracle to MariaDB with Docker and Connect SE: A Step-by-Step Guide
In this blog we are going to learn how to migrate data from Oracle to MariaDB.
To begin, we’ll learn the basics about Oracle database to have an understanding about the steps that are done on the demo example. After, we will create a table in Oracle and migrate it to MariaDB.
To migrate data from Oracle there are 2 ways:
For demonstration, we are going to use a docker container with an Oracle Express Edition (XE) image.
To make […]
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New GPG Release Key for RPMs
As mentioned in the previous batch of release notes (e.g. 10.6.11), our Yum/DNF/Zypper repositories for Red Hat Enterprise Linux, Centos, Fedora, openSUSE and SUSE will, from our next set of releases, be migrated to being signed with a new GPG key with SHA2 digest algorithms instead of SHA1.
The key we are migrating to is the same one we already use for our Debian and Ubuntu repositories.
- The short Key ID is:
0xC74CD1D8 - The long Key ID is:
0xF1656F24C74CD1D8 - The full fingerprint of the key is:
177F 4010 FE56 CA33 3630 0305 F165 6F24 C74C D1D8
- The short Key ID is:
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Gcov in MariaDB
Gcov is a coverage testing tool, used to create better programs. It can show which parts of the codebase are untested. Gcov is located in the same package as gcc. MariaDB takes care of code quality and checks test coverage with Gcov. We are looking forward to have Gcov used soon as a part of our buildbot (MDBF-158).
How to use Gcov
Let’s write a demo example to demonstrate how it works.
— Source code:
— Compile the source code […]
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replicate_rewrite_db as a system variable in MariaDB
MariaDB 10.11.0, our latest preview release, features quite a number of improvements. The one we’ll talk about here is replicate-rewrite-db. This option has become a system variable from 10.11.0 based on MDEV-15530. Before this version it was just an option used by the mariadbd and mariadb-binlog binaries. There have been no behaviour changes with the option; it has simply become a dynamic variable.
How to try out this feature
The fastest way is to take MariaDB 10.11 for a spin […]
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MariaDB & K8s: How to replicate MariaDB in K8s
In the previous blog we have seen how to create a statefulset MariaDB application. Also, we learned how replication works in MariaDB in this blog. Now, we will try to create a replicated statefulset application. As good references for creating this blog, I would like to give credit to the Kubernetes documentation as well as an example from Alibaba Cloud.
Configure replication
To replicate a MariaDB application we are going to create a statefulset that will consist of a single […]