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11th May 2017

in High Availability

Leading European research university maintains top-class website with

Posted by Jake Borman 11th May in High Availability

One of Europe’s leading research universities, Eindhoven University of Technology, has called on to ensure that its main website - where students, researchers and businesses first interact with the University – is highly available and is fast to navigate.

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5th December 2016

in High Availability

GSLB – Why Global Server Load Balancers Don’t Always Suck? (Polaris-GSLB) Part 2

Posted by Aaron West 5th December in High Availability

In part one we were introduced to Polaris-GSLB which is a cool little open source GSLB solution, we went through a simple use case scenario and discussed the features it supports. In part two of this Blog I’m going to show you how to build Polaris-GSLB on CentOS 7.

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15th November 2016

in High Availability

GSLB – Why Global Server Load Balancers Don’t Always Suck? (Polaris-GSLB)

Posted by Aaron West 15th November in High Availability

There is a lovely open source project on GitHub called Polaris-GSLB, you can find out more about it here : It allows us to perform health checks to test availability, define topologies to serve up local results for local clients and perform load balancing of up to 32 endpoints!

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28th September 2016

in AWS and Azure

Transparent HAProxy in Azure using TProxy

Posted by Ben Cabot 28th September in AWS and Azure

We all know that the built-in Azure load balancer is perfectly functional, but sometimes you need a proper load balancer. HAProxy is an excellent choice if you need layer 7 functionality, but its a full reverse-proxy, so the application thinks that all of the traffic is coming from HAProxys IP - rather than the clients. So what can you do if the load balanced application needs to know the real clients IP address in Azure?

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1st July 2016

in Disaster recovery

Seamless Load Balancer Recovery – as easy as 1, 2, 3

Posted by Rob Cooper 1st July in Disaster recovery

So, you've configured two appliances as a clustered pair for high availability, the pair has been working fine but then one day you receive an email alert that one of the pair has failed for some reason, for example a disk failure. The remaining unit continues to provide load balanced services without issue, but now you want to repair the failed unit and re-create the clustered pair without any disruption to running services.

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11th May 2016

in AWS and Azure

Integrating your load balancer with auto scaling groups in EC2 (Amazon AWS)

Posted by Ben Cabot 11th May in AWS and Azure

Amazon's auto scaling feature is a great tool to ensure that you always meet your desired server capacity. This helps you keep up with the demand from your users while keeping costs down. Amazon's ELB ties in well with auto scaling groups automatically load balancing servers that have been brought up as the result of an auto scaling action. However some people require more from their load balancer than ELB can provide.

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19th August 2015

in High Availability

Why do I need two load balancers?

Posted by Malcolm Turnbull 19th August in High Availability

This question was asked a lot more frequently 10 years ago. In fact we were asked it so often that we used it as the title on the home page for that very reason. It amazed me that people would go to all the effort of configuring a cluster of multiple application servers but only use ONE load balancer! That's just plain stupid.

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