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Displaying posts with tag: galera (reset)

Before every release: A glimpse into Percona XtraDB Cluster CI testing
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I spoke last month at linux.conf.au 2014 in Perth, Australia, and one of my sessions focused on the “Continuous Integration (CI) testing of Percona XtraDB Cluster (PXC)” at the Developer,Testing, Release and CI miniconf.

Here is the video of the presentation:

Here is the presentation itself:

Percona XtraDB Cluster before every release: Glimpse into CI testing from Raghavendra Prabhu

Below is a rough transcript of the talk:

This talk covered the continuous integration

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Auto increments in Galera
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Lets start by considering a scenario where records are being inserted in a single auto-increment table via different nodes of a multi-master cluster. One issue that might arise is ‘collision’ of generated auto-increment values on different nodes, which is precisely the subject of this article.

As the cluster is multi-master, it allows writes on all master nodes. As a result of which a table might get same auto-incremented values on different nodes on INSERTs. This issue is discovered only after the writeset is replicated and that’s a problem!

Galera cluster suffers with the similar problem.

Lets try to emulate this on a 2-node Galera cluster :

1) On node #1:

MariaDB [test]> CREATE TABLE t1(c1 INT AUTO_INCREMENT PRIMARY KEY, c2 INT)ENGINE=InnoDB;
Query OK, 0 rows affected (0.07 sec)

MariaDB [test]> START TRANSACTION;
Query OK, 0
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How to Deploy Galera Cluster for MySQL using Docker Containers
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February 18, 2014 By Severalnines

Virtual Machines are great, and very useful when trying out new software. However, they might be an unnecessarily heavyweight solution when testing clusters, especially if these consist of multiple nodes running exactly the same software. Each VM runs a full-blown OS image. On the other hand, Linux Containers (LXC) are an efficient alternative to OS-level virtualization and can run multiple isolated systems on a single host. Docker is a wrapper around LXC, it automates the deployment of applications inside containers. 

A notable advantage if you run with Docker + LXC is you can run many containers on a single host.

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MariaDB Galera Cluster 5.5.35 Now Available
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The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 5.5.35. This is a Stable release.

See the Release Notes and Changelog for detailed information on this release and the Galera page in the MariaDB Knowledge Base for general information about MariaDB Galera Cluster.

Download MariaDB Galera Cluster 5.5.35

Release Notes

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Webinar: Migrating to MySQL, MariaDB Galera and/or Percona XtraDB Cluster
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February 13, 2014 By Severalnines

 

Galera is slowly but surely establishing itself as a credible replacement for traditional MySQL master-slave architectures. 

The benefits are clear - a true multi-master InnoDB setup with built-in fail-over, potentially across data centers. 

But how do you migrate? Does the schema or application change? What are the limitations? Can migration be done online, without service interruption? What are the potential risks, and how to address those?

 

Webinar: Migrating to MySQL, MariaDB Galera and/or Percona XtraDB Cluster

 

Tuesday, March

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Follow up on FOSDEM
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After my presentation at FOSDEM I got a few questions regarding our Galera implementation and why we did things the way we want. First of all, the slides: Spil Games @ FOSDEM: Galera Replicator IRL from spil-engineering Second of all, the questions I got: Q: Why first copy all the data to a new MySQL […]

The post Follow up on FOSDEM appeared first on Spil Games Engineering.

Announcing Partnership with Percona
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February 4, 2014 By Severalnines

Great news for Percona customers! We are thrilled to announce our partnership with Percona. Effective immediately, Percona customers will be able to enjoy the advanced automation, monitoring and cluster management capabilities of ClusterControl. Percona will be bundling, with its Cluster support contracts, Percona ClusterControl - a privately branded version of ClusterControl Community. Together we're providing support for the full stack, from Percona XtraDB Cluster to management tools, giving customers one number to call. 

For anyone who has deployed, managed or

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How to Cluster Liferay with MySQL Galera and Ceph for High Availability and Performance
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February 3, 2014 By Severalnines

Liferay is an open-source content management system written in Java. It is used by a number of high traffic sites, as this survey suggests. 

Clustering Liferay and other components such as the database and the file system is a good way to handle the performance requirements of a high traffic site. The latest Liferay version has introduced features that simplify clustering, such as built-in support for Ehcache clustering, Lucene replication, read/write splitting capabilities for database (in case if you run on

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MaxScale for the rest of us - Part 1
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MaxScale for the rest of us - Part 1

SkySQL released MaxScale as Open Source on github a few weeks ago. For some instructions on how to install and configure it, Ivan Zoratti has written a blog about that, and Mark Riddoch has written about why we need MaxScale here, but what I will try in a series of blogs is to describe what MaxScale is, in terms of what you can do with it, and to put it into context, so that you have an idea why you would want to install it in the first place. I will also show how to configure and manage MaxScale. This first post is a quick introduction to MaxScale.

So what is



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Benchmarking Galera Cluster
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What is it about?

I used to do some benchmarkstuff and blogged about it on my blog written in German. Im going to do testings and benchmarkings again:)

We are going to have a look into ‘benchmarking’ a 3-node Galera Cluster. The application (sysbench) is on a separate node accessing one node of the cluster. This would be the case in a i.e. VIP setup.

Setup

3 Galera Nodes

  • Virtual machines (OpenStack) provided by teuto.net
  • VCPU: 4
  • RAM: 4GB
  • OS: Centos 6.4-x86_64
  • MySQL-server-5.6.14wsrep25.1-1.rhel6.x86_64
  • galera-25.3.2-1.rhel6.x86_64

Separate sysbench node

  • Same specs as the Galera nodes
  • sysbench 0.5
  • oltp test on 5 tables 1000000 rows each (ca. 1.2GB)
  • A run took 60
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10 Newer Entries Showing entries 31 to 40 of 131 10 Older Entries

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