Blog & Articles.

We publish an ongoing series of blogs & articles on various topics related to digital analytics and online marketing.

Amazon Load balancing issues

Start your free, no-risk, 4 week trial! Track your visitors now Amazon Load balancing issues As we move a greater number of services towards the cloud (Amazon Web Services) we pioneer our way into an brand new universe of opportunity. We also come across technical issues for which no documentation exists on the internet (we know sounds a bit like Star Trek and Lucasfilm). So we are learning every day, which makes this process very enjoyable. To give an example, take amazon’s Load Balance service (ELB). We moved some of our script-serving traffic to an auto-scaling load balancer and watched

Read More »

Setting up tomcat 6 with APR and ssl

Start your free, no-risk, 4 week trial! Track your visitors now startup-accelerator-diary-1 The Rockstart Accelerator In Amsterdam is one of several world-class technology accelerators in The Netherlands. We entered ourselves into the competition earlier a few months ago, and came in the top percentile out of more than 500 companies, securing a place in the 100-day program. LeadBoxer is the product that we are developing within the Rockstart program, which utilises the Lean framework methodology. http://leadboxer.com is a new product, utilizing big data technology in order to make anonymous website traffic less anonymous, and function as an essential pre-sales tool. Currently being

Read More »

Setting up a auto scaling, load-balanced, webserver with Amazon

Start your free, no-risk, 4 week trial! Track your visitors now Setting up a auto scaling, load-balanced, webserver with Amazon Step 1. Define your loadbalancer As of now, Amazon only supports 2 ports: the default web-traffic on port 80 and ssl secure https traffic on port 443. Unfortunatly you need to choose 1 of them,  but i hope they will change it in the future. You also need to select a availabilityzone, make sure your servers are in the same zone.. elb-create-lb LoadBalancerNameHere –headers –listener “lb-port=80,instance-port=8080,protocol=HTTP” –availability-zones YourPreferedZone Step 2. Define your LaunchConfiguration The  LaunchConfiguration stores the ami you want

Read More »

Making an Amazon EC2 ami

Start your free, no-risk, 4 week trial! Track your visitors now Making an Amazon EC2 ami Welcome to our blog I wanted to share some of my thoughts regarding our goal to move Opentracker to Amazon Webservices. I started with creating my own EC2 ami’s based on a clean install of centos 5.3, and installed java and our default webserver wich is Apache Tomcat 6 the commands to make your own ami are pretty simple: copy your keys to the instance: scp -i id_rsa-your-key /path/to/keys/pk.pem /path/to/certificates/cert.pem root@public-ami-dns-name:/mnt go to /tmp dir cd /tmp create a volume for bundeling ec2-bundle-vol -d /mnt

Read More »