Posts Tagged ‘cloud’

Pricing the Cloud: the Amazon ec2 point of view

Wednesday, August 25th, 2010

Recently I went into price models for cloud computing and this is an interesting figure from Amazon.

The picture came from the Amazon developer guide and is more or less a good summary. In few words you pay for CPUs, data coming in and out amazon and permanent storage.

What is not clearly shown in the picture is the costs for the amazon services. In other words every time you perform a change or monitor in the infrastructure with external tools you must pay something because you are using the web services of amazon. If you have a lot of datas or you are using many virtual machine this cost is negligible but if you plan a close monitoring to your infrastructure you should be prepare to add this extra costs.

Demoing the Instrument Element

Wednesday, July 21st, 2010

Distributed Applications, such as Service Oriented Architectures, are more and more becoming a collection of huge quantity of heterogeneous software. This software needs to be installed, configured and maintained.
In an ideal situation, machines that have to cooperate together should retrieve information about the environment and adjust their functionality according to their needs, without trigger any human interaction.

Different possibilities have been explored to cope with this problem in diverse scenarios in which machines and Instruments are deployed. This kind of demand becomes even more crucial in those cases characterized by a huge number of sensors/probes involving a highly dynamic change in their distribution and inter-connections.
Peer to peer has been proposed as a possible approach for covering the aforementioned need. With this solution different instruments can discover information by the others and cooperate to optimize the overall system performances and/or repair possible system faults.
This video presents a simple and intuitive demonstration of self-configuration and self-optimization properties in a set of Instruments. Here you have the possibility to see the system deployment and to trigger a re-configuration by adding a new Instrument.
The map of this video shows several different markers, each representing one or more instruments spread about the entire world.
Different colours stand for different types of Instruments: adding a new marker on the map, that means to join your machine, as a new Instrument, into the Instrument Network, is as easy as clicking a “Join!” button.

In the Demo you will see the following actions:
1) Server that hosts a geo-location of existing devices is displayed
2) A sensor application is started in a local machine using javaWeb start.
3) The Map is automatically updated with the location and the information of the new node.
4) The sensor is de-instantiated and it disappear from the map.
5) The basic GUI of the core machine that maintains the information of the index is displayed
6) Different ways of showing the information acquired from the sensors are displayed

More information: