1. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Intelligent Clouds: A Middleware Architecture Proposal Supporting Business Elasticity

2. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Vasileios Anagnostopoulos National Technical University of Athens Athens, Greece vanag@mail.ntua.gr Andreas Menychtas National Technical University of Athens Athens, Greece ameny@mail.ntua.gr Vrettos Moulos National Technical University of Athens Athens, Greece vrettos@mail.ntua.gr Theodora Varvarigou National Technical University of Athens Athens, Greece dora@telecom.ntua.gr Anna Gatzoura Universitat Politecnica de Catalunya Calle Jordi Girona, 31, 08034 Barcelona, Spain anna.gatzioura@gmail.com

3. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Cloud computing == Utility Computing Research interests of paramount importance and focus of this paper:  Cost-effective consumption of resources  Efficient consumption of resources  Scalable consumption of resources The measurable result =>Reduction of operational and hardware costs of IT departments. Behind the scenes => Amortization of cost across different customers.

4. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Factors driving cost reduction Low cost of resources Automatic provisioning of resources Elastic usage of resources (pay as you go)

5. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 The problem tackled in this paper Deployment to different administrative domains Deployment to different technological domains Proper billing Availability Marketplace for services Scaling

6. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 4Caast The recently finished FP7 4Caast EU funded project aimed to improve upon the RESERVOIR architecture. According to its mission statement, the 4CaaSt project aimed to create an advanced PaaS Cloud platform which supports the optimized and elastic hosting of Internet-scale multi-tier applications. We build upon 4Caast. We actually build a suitable deployment descriptor. The descriptor allows deployments on 4Caast. We do not take account legacy applications.

7. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Intelligent Cloud Deployment on different vendors

8. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 The differences SaaS layer is the layer where cloud applications export or import services. PaaS layer is the execution environment of cloud enabled applications. IaaS layer is the resource environment utilized by cloud applications.

9. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 For example A SOA-like cloud native approach could allow the execution of the database as a cloud application on PaaS and export its services at the SaaS layer. From this point of view either the database can be impported as a service or can be installed as a PaaS product.

10. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Intelligent Cloud Deployments: without / with service references

11. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 ICM architecture

12. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Cloud Application Deployment on ICM Architecture

13. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Conclusions Embrace the philosophy of computing as a utility with a pay-as-you- go pricing model (even for private clouds) This can be achieved by utilizing standards and advanced architectural designs like an intelligent cloud native middle ware, which eases the development and provisioning of future cloud enabled products. Our main contributions are the description of a general form of elasticity rules, the concept of product scaler, and finally of an innovative cloud native middleware architecture. The main benefit of this approach is that the scalability and pricing of an application can be transparently refactored in a generic and, at the same time, effective way to the Cloud.

14. © 2012 4CaaSt Consortium. All rights reserved. The research leading to these results has received funding from the European Union's Seventh Framework Programme ([FP7/2007-2013] ) under grant agreement n° 258862 Thank you The research leading to these results has received funding from the European Union’s Seventh Framework Programme (FP7/2007−2013) under grant agreement n o 258862 – 4CaaSt Project. The research leading to these results is partially supported by the European Community’s Seventh Framework Programme (FP7/2007−2013) under grant agreement n o 317859, in the context of the ARTIST Project. The research presented in this paper is granted by the European Union and the Hellenic General Secretary of Research and Technology under the ”COOPERATION 2009/09SY N−72 − 956” Framework.