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Showing entries 1 to 10 of 53 10 Older Entries

Displaying posts with tag: Clustering (reset)

Clustering Moodle on Multiple Servers for High Availability and Scalability
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August 12, 2014 By Severalnines

Moodle is an open-source e-learning platform (aka Learning Management System) that is widely adopted by educational institutions to create and administer online courses. For larger student bodies and higher volumes of instruction, moodle must be robust enough to serve thousands of learners, administrators, content builders and instructors simultaneously. Availability and scalability are key requirements as moodle becomes a critical application for course providers. In this blog, we will show you how to deploy and cluster moodle/web, database and file-system components on multiple servers to …

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Picking the Right Clustering for MySQL: Cloud-only Services or Flexible Tungsten Clusters? New webinar-on-demand
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As businesses head into the cloud, it is tempting to reach for the first product that offers to make database operation as simple as punching a few buttons on a menu.  However, there’s a big difference between firing up cloud database services such as Amazon RDS for testing or development and finding a solution that can handle hundreds of millions of transactions daily. This webinar-on-demand

Continuent Tungsten 2.0.3 Release Notification
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We are pleased to inform you that the new Continuent Tungsten 2.0.3 is now available. This is a recommended release for all Continuent Tungsten clustering customers as it contains important updates and improvements to the stability of the manager component, specifically with respect to possible stalls and memory usage that would cause manager failures:

A number of fixes to the Manager

Continuent Tungsten 2.0.2 Release Notification
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We are pleased to inform you that the new Continuent Tungsten 2.0.2 is now available. Continuent Tungsten keeps data available to applications 7x24 through hardware failures, maintenance, and software upgrades. It ensures business continuity and performance by keeping up-to-date data closer to the user, and increases application throughput and improves response time by load balancing SQL

Setup & operate Tungsten webinar series
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Don't miss your opportunity to learn about Continuent Tungsten via our free "Setup & Operate" webcast series. These free webcasts include live presentations and interactive Q&A.Webcast OverviewsSetup & Operate Tungsten ReplicatorMay 15th, 10:00 am PDTTungsten Replicator is an innovative and reliable tool that can solve your most complex replication problems. We will introduce Replicator

See you at ICTexpo Helsinki 2014
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ICTexpo Helsinki 2014 offers two effective days full of innovations, inspiration and information - the biggest professional IT show in the Nordics with large scale of solutions to help you to take your business to the next level. Continuent will be exhibiting in Red Hat Village [booth 5f31], which gathers the most significant enterprise level companies from the Open Source ecosystem in Finland

Multiple masters : attraction to the stars
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In the last 10 years I have worked a lot with replication systems, and I have developed a keen interest in the topic of multiple masters in a single cluster. My interest has a two distinct origins:

  • On one hand, I have interacted countless times with users who want to use a replication system as a drop-in replacement for a single server. In many cases, especially when users are dealing with applications that are not much flexible or modular, this means that the replication system must have several points of data entry, and such points must work independently and in symbiosis with the rest of the nodes.
  • On the other hand, I …
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Must-see webinars for SaaS and business-critical MySQL users
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Join Continuent and our customers Modernizing Medicine and Marketo to learn how to run business-critical MySQL applications in the cloud or on-premises. Modernizing Medicine is a fast-growing SaaS company, offering electronic medical records management solution. Matthew Lang, Sr. Site Reliability Engineer at Modernizing Medicine, describes how Modernizing Medicine serves thousands of customers

Scaling Drupal on Multiple Servers with Galera Cluster for MySQL
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April 26, 2013 By Severalnines

This post shows you how to move from a single instance Drupal/MySQL to a multi-server environment. A well designed multi-server deployment not only allows Drupal to scale, but will also enhance redundancy by removing single points of failure. Components used are Apache, PHP, csync2, lsyncd, Keepalived, HAproxy, MySQL Galera Cluster and ClusterControl.

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Multi-master data conflicts - Part 1: understanding the problem
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What is a conflict?

Readers of this blog know that one of my favorite tools, Tungsten Replicator, can easily create multi-master replication topologies, such as all-masters, star, fan-in. While this is good news for system designers and ambitious DBAs, it also brings some inconvenience. When you allow updates to happen in more than one master, you risk having conflicts. You may have heard this term before. For the sake of clarity, let's define what conflicts are, before analyzing each case in detail.

You have a conflict when several sources (masters) update …

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Showing entries 1 to 10 of 53 10 Older Entries

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