How to move the Relay role to another node in a Composite Tungsten Cluster

Author: , July 25th, 2019

How to move the Relay role to another node in a Composite Tungsten Cluster

Slick Command-Line Tricks for a Tungsten MySQL / MariaDB Database Cluster

Author: , July 16th, 2019

Tungsten Clustering provides high availability, disaster recovery, and a host of other benefits for MySQL / MariaDB / Percona Server databases. In this blog post we will explore some of the shell aliases I use every day to administer various Tungsten Clusters.

What on Earth is a Split-Brain Scenario in a MySQL Database Cluster?

Author: , June 24th, 2019

In this blog post we will define what a split-brain scenario means in a MySQL database cluster, and then explore how a Tungsten MySQL database cluster reacts to a split-brain situation.

Configuring the Tungsten Connector for PCI Compliance

Author: , June 18th, 2019

This blog is about configuring Tungsten for PCI compliance.

Using Keep-Alives To Ensure Long-Running MySQL & MariaDB Sessions Stay Connected

Author: , June 14th, 2019

Overview The Skinny In this blog post we will discuss how to use the Tungsten Connector keep-alive feature to ensure long-running MySQL & MariaDB/Percona Server client sessions stay connected in a Tungsten Cluster. Agenda What’s Here? Briefly explore how the Tungsten Connector works Describe the Connector keep-alives – what are they and why do we […]

The Important Role of a Tungsten Rollback Error

Author: , May 24th, 2019

The Question Recently, a customer asked us: What is the meaning of this error message found in trepsvc.log? 2019/05/14 01:48:04.973 | mysql02.prod.example.com | [east – binlog-to-q-0] INFO pipeline.SingleThreadStageTask Performing rollback of possible partial transaction: seqno=(unavailable) Simple Overview The Skinny This message is an indication that we are dropping any uncommitted or incomplete data read from […]

Understanding Cross-Site Replication in a Tungsten Composite Multi-Master Cluster for MySQL, MariaDB and Percona Server

Author: , May 22nd, 2019

Overview The Skinny In this blog post we will discuss how the managed cross-site replication streams work in a Composite Multi-Master Tungsten Cluster for MySQL, MariaDB and Percona Server. Agenda What’s Here? Briefly explore how managed cross-site replication works in a Tungsten Composite Multi-Master Cluster Describe the reasons why the default design was chosen Explain […]

Performance Tuning Tungsten Replication to MySQL

Author: , May 21st, 2019

The Question Recently, a customer asked us: Why would Tungsten Replicator be slow to apply to MySQL? The Answer Performance Tuning 101 When you run trepctl status and see: appliedLatency : 7332.394 like this on a slave, it is almost always due to the inability for the target database to keep up with the applier. […]

SSH Differences Between Staging and INI Configuration Methods

Author: , May 7th, 2019

The Question Recently, a customer asked us: If we move to using the INI configuration method instead of staging, would password-less SSH still be required? The Answer The answer is both “Yes” and “No” No, for installation and updates/upgrades specifically. Since INI-based configurations force the tpm command to act upon the local host only for […]

How to Integrate Tungsten Clustering Monitoring Tools with PagerDuty Alerts

Author: , April 23rd, 2019

Overview The Skinny In this blog post we will discuss how to best integrate various Continuent-bundled cluster monitoring solutions with PagerDuty (pagerduty.com), a popular alerting service. Agenda What’s Here? Briefly explore the bundled cluster monitoring tools Describe the procedure for establishing alerting via PagerDuty Examine some of the multiple monitoring tools included with the Continuent […]