Author Archives: Keith Hollman

Migrating/importing NDB to Cluster Manager w/ version upgrade.

I’ve had some questions from people using MySQL Cluster GPL and wanting to move to using MySQL Cluster Carrier Grade Edition, i.e., they want to use MySQL Cluster Manager, MCM, to make their lives much easier… Continue reading

Posted in CGE, Cluster 7.3, Cluster Manager, MySQL, MySQL Cluster, Oracle, Uncategorized, upgrade | Tagged , , , , , , , | Leave a comment

NDB 7.4 & SYS schema: When getting locks, detecting the guilty SQL & o.s.pid.

Here’s a way to detect the sql query causing a lock or a session to fail, and also to identify the o.s.pid if need be (btw, no rocket science). “a” way.. I’m sure there are many others, so feel free … Continue reading

Posted in Cluster Manager, MySQL Cluster | Tagged , , , , , , , , , , | 3 Comments

MySQL in a USB, with a little help of Fabric

If you’ve wanted to see how well MySQL Fabric actually works and how easy it makes setting up replication and switching Masters & Slaves back and forth, with a sample use case of having the master stored in a USB … Continue reading

Posted in Uncategorized | 1 Comment

MySQL Cluster: Una introducción en Español.

MySQL Cluster: El ‘qué’ y el ‘cómo’. Para aquellos que encuentran mucho sobre MySQL en Inglés pero poco en Español: mi pequeña aportación. En el enlace tenéis información sobre qué es MySQL Cluster y cómo funciona. Incluso con ejemplos técnicos … Continue reading

Posted in CGE, Cluster 7.3, Cluster Manager, MySQL, MySQL Cluster, Oracle, Uncategorized | Tagged , , , , , , , | 1 Comment

MySQL 5.7.7 RC & Multi Source Replication 40 to 1.

One of the cool new features in 5.7 Release Candidate is Multi Source Replication, as I previously looked into in 5.7.5 DMR. I’ve had more and more people like the idea of this, so here’s a quick set-up as to … Continue reading

Posted in Multi Source Replication, MySQL, Replication | Tagged , , , , , , | 1 Comment

Enterprise Monitor: “Add Bulk MySQL Instances” 50 in 1-click.

Carrying on with my MySQL 5.7 Labs Multi Source Replication scenario, I wanted to evaluate performance impact via MySQL Enterprise Monitor. Whilst I opened my environment, I remember that I had generated lots of different skeleton scripts that allowed me … Continue reading

Posted in MEM 3.0, Multi Source Replication, MySQL, MySQL Enterprise Edition, MySQL Enterprise Monitor, Replication | Tagged , , , , , , , , | 2 Comments

a multisource replication scenario: 10 masters, 1 slave.

A customer asked whether we they could have 10 or more masters consolidate all the data into a single central slave. After getting a bit more information from them and seeing the application functionality, it was clear that MySQL Labs … Continue reading

Posted in MySQL, Replication | Tagged , , , , | 5 Comments