Disable SELinux? Think again! SELinux is always a complicated topic. If you search this on the web, most people will advise just disabling it, but that may not be acceptable from a security point of view in your organization. In…Read More >
Continuent Tungsten is one of the few all-in-one solutions for MySQL high availability. In this post I will show you how to automate the upgrade process using Ansible. I will walk you through the individual tasks and, finally, give you…Read More >
Orchestrator is a MySQL high availability and replication management tool. In this blog post, we will cover the first steps for getting started with it on an existing topology. The code examples assume you are running Centos 7, but the…Read More >
Introduction In this post we will explore one approach to MySQL high availability with HAProxy, Consul and Orchestrator. Let’s briefly go over each piece of the puzzle first: – HAProxy is usually installed on the application servers or an intermediate…Read More >
Introduction One of the things I like about Continuent Tungsten is how Tungsten Connector can hold traffic while a (graceful) master switch is taking place. This means the application may experience a brief spike in latency, but has not returned…Read More >
Introduction In this article we will explore one approach for deploying ProxySQL behind a load balancer in Google Cloud. While considering the deployment of ProxySQL, one has basically the following options: Install ProxySQL on existing application server(s) Provision dedicated ProxySQL…Read More >
Doing online schema changes in a managed database environment is not as straight-forward as one may think. Using gh-ost with Amazon RDS / Aurora can help you overcome commonly found issues with DDL changes, including: Long transactions Slave lag Temporary tables…Read More >
While investigating alternatives to migrate to Google Cloud SQL, I encountered a lack of support for external masters. However, it’s possible to overcome this limitation by replicating into Google Cloud SQL using Tungsten replicator. Cloud SQL is Google’s database-as-a-service solution,…Read More >
In this post I will show you how to leverage Github’s gh-ost hooks for greatly improving visibility of ongoing schema changes for your organization. One of the potential uses of gh-ost hooks is to send status updates. I will present you with…Read More >
As we know, replication is only supported officially between consecutive major MySQL versions, and only from a lower version master to a higher version slave. This means for example, the following scenario is supported: 5.6 master –> 5.7 slave while these…Read More >
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