Codership Tutorials on Galera Cluster¶
Article Counts: 20 Tutorials; Recent Changes: 2 Revised, 3 New Articles
These are tutorial articles of the training section of the Codership Library. Here you will find tutorial articles on how to get started with Galera and other basic tasks related to initially starting a Galera Cluster. There are also some intermediate articles on a few other aspects of Galera and related software.
Getting Started with Galera Cluster
Length: 840 words; Writer: Staff; Pub: Oct 2014
This article explains Galera Cluster, how it works. It provides an overview for installing Galera and initializing nodes in a cluster. It is a jumping off point to several other tutorials here.
Length: 946 words; Writer: Staff; Pub: Oct 2014
This tutorial provides instructions to prepare your servers and instal Galera Cluster on each. When you install Galera, you have to choose between three implementations available.
Installing a Galera Cluster on AWS
Length: 2494 words; Writer: Russell J.T. Dyer; Pub: Jun 2019
This tutorial explains how to use Amazon Web Services (AWS) to create virtual servers for a Galera Cluster: how to install and configure the database and Galera software on each node.
Length: 964 words; Writer: Staff; Pub: Oct 2014
After installing Galera, you will need to configure each node. This straightforward article provides a list of parameters to set in each node’s database configuration file.
Length: 964 words; Writer: Staff; Pub: Oct 2014
This article provides a guide to configure the database server to connect and communicate with the cluster. It explains the syntax format used in cluster addresses.
Length: 1,097 words; Writer: Staff; Pub: Oct 2014
A cluster requires at least two nodes, but you have to start the first one somehow. You’ll need to bootstrap the Primary Component. This article explains how to initialize the cluster.
Getting Started Galera with Docker
Length: 1416 words; Writer: Erkan Yanar; Pub: May 2015
This article explains how to build a basic Docker Image and deploy it on a test cluster. It also describes how to deploy Galera Cluster over multiple Docker hosts.
Length: 499 words; Writer: Staff; Pub: Oct 2014
Once you have a cluster running, test its features to ensure it’s working well, to decide on a deployment plan. This tutorial provides a guide to testing replication and cluster operations.
Differences from a Stand-Alone MySQL Server
This tutorial provides information on the differences between a Galera Cluster and a Stand-Alone MySQL Server.
Length: 2535 words; Writer: Russell J.T. Dyer; Pub: Jul 2019
This tutorial explains how to monitor a Galera Cluster, utilizing the Galera specific status variables, as well as employing scripts for logging status information.
Making Back-Ups with Galera Cluster
Length: 2693 words; Writer: Russell J.T. Dyer; Pub: Nov 2019
Using Galera, there are a few ways to make a back-up. This article looks at back-up basics, methods involving replication, and how to automate back-ups using the Galera functionality.
Length: 985 words; Writer: Philip Stoev; Pub: Jul 2015
The entire dataset is transfered (that is, SST) to a new node and when a node rejoin after being down for a long time. This article offers insights and advice if there are problems with SST.
The Primary Component in Galera Cluster
Length: 782 words; Writer: Philip Stoev; Pub: Aug 2015
This article describes the Primary Component. This is a central concept in how Galera ensures database consistency and no divergence between nodes in case of a network split.
Galera Cluster Migration Factors
Length: 2087 words; Writer: Staff; Pub: Oct 2014
Migrating data with Galera Cluster should be done carefully. This tutorial article will help you to understand the concepts involved and take you through the steps to migrate a database.
Support for Transaction Isolation Levels
Length: 1009 words; Writer: Seppo Jaakola; Pub: Sep 2015
Many DBAs and database developers do not understand what MySQL transaction isolation levels Galera CLuster supports and how it does so. This articles tries to answer those uncertainties.
Length: 1001 words; Writer: Philip Stoev; Pub: Dec 2016
When a node rejoins a cluster, there are two methods of synchronizing it quickly. This article describes the process of doing this and confusing messages one might see in the logs.
Length: 791 words; Writer: Staff; Pub: Oct 2014
Restarting a cluster so that data isn’t overwritten can be tricky. This article explains how to determine the most up-to-date node, so that it is the first node of the new cluster.
Length: 745 words; Writer: Philip Stoev; Pub: Nov 2016
When it is necessary to shut down a cluster, it is important to do so safely and as quickly as possible to avoid extended downtime and data loss. This article gives advice in this area.
Recovering a Galera Node or the Entire Cluster on Ansible
When it is necessary to recover a cluster node or the entire cluster by using Ansible, this article gives advice in this area.
Read-After-Write Semantics with Galera
Length: 599 words; Writer: Philip Stoev; Pub: Jun 2015
Clients may try to read rows just inserted, excluding it from a transaction. Read/write splitting proxy, or a connection pool and a load balancer, can send queries to other nodes.
Geo-Distributed Database Clusters
Length: 1043 words; Writer: Philip Stoev; Pub: Oct 2014
Nodes may be located in multiple physical locations. This article presents the benefits of a geo-distributed cluster, and Galera-specific features to enable replication across a WAN.
Debugging Transaction Conflicts
Length: 1,086 words; Writer: Philip Stoev; Pub: Jun 2015
When using Galera in multi-primary mode, transaction conflicts may occur if clients try to modify the same row at the same time. This discusses troubleshooting these deadlock errors.
