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When deploying Tungsten Clustering for MySQL / MariaDB / Percona Server, we always recommend an odd number of Manager nodes in each cluster. Let's take a look at how having an odd number of Managers helps keep a Tungsten Cluster functioning and avoids data corruption scenarios (i.e. "split brain").
One important way to protect your MySQL / MariaDB / Percona Server data is to keep your Tungsten Clustering software up-to-date; but how can you achieve this with zero-downtime?
The Tungsten Replicator is an extraordinarily powerful and flexible tool capable of moving vast volumes of data from source to target.
Think about it - your global, cloud-based application needs to be online and available for the business to run. Downtime is to be avoided like the plague. Perhaps you even have multiple cloud providers to span.
How do we create a database service layer that handles all kinds of failures?
Achieving software upgrades without downtime is a challenge that few software products can handle, or even try to. Tungsten Clustering is one that can!
Think about it - your application needs to be online and available for the business to run. Downtime is to be avoided like the plague. The buzz is all about five nines of uptime.
How do we as systems architects, DBAs and sysadmins create an environment where routine maintenance is not a thing to be feared and put off, but embraced to allow for proper and needed updates and upgrades to take place?