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Pacemaker is an open source, high availability resource manager suitable for both small and large clusters. It supports many deployment scenarios and can dramatically reduce hardware costs by allowing several active/passive clusters to be combined to share a common backup node. It monitors the system for hardware and software failures, using advanced algorithms to automatically recover applications in the event of a failure.

In this article, Yossi Nachum of Emind Systems gives a step-by-step guide to installing Pacemaker in Amazon AMI.

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In AWS, users are charged for allocated Elastic IPs that are not associated with a running instance or network interface (VPC). Therefore, the accepted best practice is to keep only those IP addresses that will be needed in the future. Allocated Elastic IPs you don’t plan to use in the future, or those you just forgot to release, may contribute to unexpectedly high AWS bills.

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The following presentation brought to you by an Accenture technology architecture consultant. The slides describes the deployment of routeyou.com, a high traffic site (avg 25K Visits per day). The presentation contains s short comparison between AWS cloud and Rackspace cloud with regards to storage and servers.

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AWS EC2 is a scalable, reliable and low-priced offering from Amazon for the user’s virtual computation or hosting needs. An Amazon Machine Image (AMI) is an encrypted packaged-up environment that includes all the necessary bits to set up and boot the user’s instance. After an AMI is launched, the resultant running system is called an instance. Learn how to Launch an Amazon AWS EC2 Instance. The instance is the user’s basic computation building block. Amazon EC2 offers multiple instance types based on the RAM, Storage and Compute Units. Once launched, an instance looks very similar to a traditional host. The user will have complete control on the instances.

The present guide helps to understand the various parameters of metadata of an AWS Instance. Learn how to get the EC2 metadata.

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Cloud costs can easily spiral out of control if you’re not paying close enough attention. It’s important to track your cloud usage patterns so that you know, with confidence, that you’re getting the most bang for your buck! Some of the decisions you’ll be faced with include whether you should be re-sizing an instance or if your EBS volumes are financially efficient. In this post, I’ll talk about how to choose between EBS-backed and Instance Store-backed AMIs.

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Currently IT departments and infrastructure providers are under increasing pressure to provide computing infrastructure at the lowest possible cost. Evolution of the Cloud computing paradigm has made software systems more scalable with a cost-effective approach. One of the most popular and innovative Cloud infrastructure providers is Amazon Cloud Services (AWS).

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