If you noticed a slow down in the past minutes, one of the routers of our provider had some issues. This slowed down the services for a short period of time. As you can see on the following graph, suddenly our GET requests to monitor the response time of the services went bong. 20 second response time, this is the equivalent of dead...
But I must say, this is where I am really pleased by our provider, OVH. They immediately explained what was going on: a card of the router crashed hard or died.
At the moment, we move a bit the VMs (Virtual Machines) powering up our PaaS (Platform as a Service). The platform has one virtual machine receiving the code updates and then the Cheméo application is updated from it. The application itself is running on another VM behind the web server. The work we do is to disconnect the web server from the application. So, at the end we get :
This seams a bit complicated but the advantage is that it is very easy to add new application server VM to handle more requests.
Anyway, the split requires moving component here and there and synchronizing the data, this does not work always as expected and this why, one thing you can expect for sure is a bit of downtime during the next few days.
As a nice end of the year present, Cheméo is now running on Céondo's private Platform as a Service (PaaS). This is a huge change compared to the previous system. After the normal period of ironing out the system, the infrastructure will be more robust and flexible to allow fast iterative development. The goal is simple, Cheméo must become the reference for chemical engineering data. We are not targeting biological activity but only chemical and process engineers. 2012 is going to be fun.
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