Mysql Cluster on FromDual GmbH

Galera Cluster for MySQL

oli.sennhauser@fromdual.com (Oli Sennhauser) — Wed, 11 Dec 2013 12:08:32 +0000

Features

Galera is a synchronous multi-master replication Cluster for MySQL/InnoDB databases, having features like:

Unbreakable MySQL Cluster with Galera and Linux Virtual Server (LVS)

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 13 Jun 2013 17:13:47 +0000

Recently we had to set-up a 3-node Galera Cluster with a Load Balancer in front of it. Because Galera Cluster nodes (mysqld) still reply to TCP requests on port 3306 when they are expelled from the Cluster it is not sufficient to just leave it to the Load Balancer to check the port if a Galera node is properly running or not.

Artikel über MySQL im neuen iX

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 20 Sep 2012 15:12:59 +0000

Hallo MySQL Gemeinde,

Im neuen iX (2012-10) hat es zwei nette Artikel über: MySQL HA-Lösungen (S. 116) und MySQL 5.6 (S. 66).

Date for next MySQL Cluster trainings scheduled

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 10 Sep 2012 16:37:52 +0000

The dates for the next MySQL Cluster (ndb) trainings with the Linux Hotel are scheduled now: March 11 - 12 2013 and September 23 - 24 2013. You can book your training here.

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:

Migrating from MySQL Master-Master Replication to Galera Multi-Master Replication

oli.sennhauser@fromdual.com (Oli Sennhauser) — Fri, 02 Dec 2011 14:48:58 +0000

Introduction

Galera is a synchronous Multi-Master Replication for MySQL. It is therefore in competition with several other MySQL architectures:

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.

MySQL Cluster Local Checkpoint (LCP) and Global Checkpoint (GCP)

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 29 Jul 2010 16:29:48 +0000

MySQL Cluster is mainly an in-memory database. Nevertheless it requires a good I/O system for writing various different information to disk.

How the MySQL Optimizer with MySQL Cluster is cheating you...

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 17 May 2010 20:10:23 +0000

At a customer we had a nice example of how the MySQL Optimizer is cheating when used in combination with the MySQL Cluster. The customer had queries running not too slow in the development environment but when he tried them on the acceptance test environment (with more data) the query was running much too long which was unacceptable because this query can occur many times per second.

MySQL Cluster analysis for foodmart

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 15 Mar 2010 20:19:58 +0000

This is an automated analysis of the DBI:mysql:database=foodmart;host=localhost database for migration into MySQL Cluster. No warranty is made to the accuracy of the information.

MySQL Cluster overview

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 15 Mar 2010 14:19:19 +0000

This is a chaotic collection of my MySQL Cluster experience…

MySQL Cluster memory sizing

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 15 Mar 2010 13:53:35 +0000

MySQL Cluster is pretty fast. The reason for this is, that it is completely memory based. Nowadays memory is still, in contrary to disk, limited to your systems. Thus, before installing a MySQL Cluster you have to calculate the amount of memory you need.

MySQL Questions & Answers

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 15 Mar 2010 11:15:25 +0000

Search with special characters

This Question has been moved to the Forum.

Limitations of MySQL

oli.sennhauser@fromdual.com (Oli Sennhauser) — Mon, 15 Mar 2010 11:01:40 +0000

Often asked but informations are spread around: The limitations of MySQL.

Why does MySQL Cluster takes so long for --initial?

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 13 Nov 2008 21:43:00 +0000

This week we had a very interesting problem at a customer: They complained, that their MySQL Cluster takes about 1 hour for a --initial start-up. After some tuning on the hardware and the config.ini they brought it down to around 40 minutes. But this is still unacceptable long…

MySQL Cluster: No more room in index file

oli.sennhauser@fromdual.com (Oli Sennhauser) — Tue, 23 Sep 2008 17:18:00 +0000

Recently we were migrating an InnoDB/MyISAM schema to NDB. I was too lazy to calculate all the needed MySQL Cluster parameters (for example with ndb_size.pl) and just took my default config.ini template.

My thoughts about MySQL (Cluster) replication

oli.sennhauser@fromdual.com (Oli Sennhauser) — Sat, 28 Jun 2008 13:00:00 +0000

According to Johans wishes I write down my concerns about MySQL (Cluster) replication. These items are things I run again and again into it with customers:

Some more details about DiskSyncSize

oli.sennhauser@fromdual.com (Oli Sennhauser) — Thu, 29 May 2008 14:43:00 +0000

The parameter DiskSyncSize is a MySQL Cluster parameter and was added in MySQL 5.1.23.