Failover on FromDual GmbH

MariaDB Galera Cluster with Corosync/Pacemaker VIP

oli.sennhauser@fromdual.com (Oli Sennhauser) — Wed, 17 Mar 2021 20:26:19 +0000

Sometimes customers want to have a very simple Galera Cluster set-up. They do not want to invest into machines and build up the know-how for load balancers in front of the Galera Cluster.

Replication channel failover with Galera Cluster for MySQL

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 19 Jun 2014 07:05:38 +0000

Sometimes it could be desirable to replicate from a Galera Cluster to a single MySQL slave or to an other Galera Cluster. Reasons for this measure could be:

Galera Cluster discussions at FrOSCon 2012

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 27 Aug 2012 17:18:40 +0000

During and after Henriks great talk about Galera Cluster at the FrOSCon 2012 in St. Augustin we found 2 important things related to Galera Cluster for MySQL:

MySQL Cluster - Cluster circular replication with 2 replication channels

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 10 Jan 2011 22:30:52 +0000

A few days ago I had to deal with MySQL Cluster replication. I did not do this for a while so I was prepared to expect some interesting surprises once again.

Active/active failover cluster with MySQL Replication

oli.sennhauser@fromdual.com (Oli Sennhauser) — Fri, 05 Sep 2008 17:00:00 +0000

Electing a slave as new master and aligning the other slaves to the new master

In a simple MySQL Replication set-up you have high-availability (HA) on the read side (r). But for the master which covers all the writes (w) and the time critical read (rt) there is no HA implemented. For some situations this can be OK. For example if you have rarely writes or if you can wait until a new Master is set up.

FromDual Ops Center for MariaDB and MySQL 0.9.2 has been released

oli.sennhauser@fromdual.com (Oli Sennhauser) — Tue, 13 Aug 2019 16:50:25 +0200

FromDual has the pleasure to announce the release of the new version 0.9.2 of its popular FromDual Ops Center for MariaDB and MySQL focmm.

FromDual Ops Center for MariaDB and MySQL 0.9.1 has been released

oli.sennhauser@fromdual.com (Oli Sennhauser) — Tue, 07 May 2019 17:12:19 +0200

FromDual has the pleasure to announce the release of the new version 0.9.1 of its popular FromDual Ops Center for MariaDB and MySQL focmm.

FromDual Ops Center for MariaDB and MySQL 0.9 has been released

oli.sennhauser@fromdual.com (Oli Sennhauser) — Tue, 30 Apr 2019 09:17:40 +0200

Caution: We have introduced an evil bug which prohibits installation of focmm. Sorry! Somehow it did pass our QA. To fix this bug update file lib/Upgrade.inc on Line 1965 as follows:

FromDual Ops Center for MySQL and MariaDB 0.3 has been released

oli.sennhauser@fromdual.com (Oli Sennhauser) — Tue, 02 Feb 2016 16:24:03 +0100

FromDual has the pleasure to announce the release of the new version 0.3 of the FromDual Ops Center for MySQL and MariaDB.

MySQL HA (high availability) Cluster cookbook

oli.sennhauser@fromdual.com (Oli Sennhauser) — Sun, 27 Mar 2011 18:16:34 +0200

In the following article I have summarized some steps and hints to set-up a MySQL active/passive failover Cluster also sometimes called MySQL HA.