Introduction to migration to cloud

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1 Project acronym: NEBULA Project name: A novel vocational training programme on cloud computing skills Project code: LLP GR-LEONARDO-LMP Document Information Document ID name: Nebula_WP4_D4.3.1_Learning_Material_and_Content_2015_30_04 Document title: Nebula VET program learning material and content Type: Slides Date of Delivery: 30/04/2015 Work package: WP4 Activity D Dissemination level: Public Document History Versions Date Changes Type of change Delivered by Version /04/2015 Initial Document - UCBL and INSA of Lyon Version /06/2015 Edition Modifications according to feedback provided by partners UCBL and INSA of Lyon Version /09/2015 Edition Insertion of license type UCBL and INSA of Lyon Acknowledgement The persons of UCBL in charge of producing the course are Parisa Ghodous, Catarina Ferreira Da Silva, Jean Patrick Gelas and Mahmoud Barhamgi. The persons from UCBL involved in preparing, translation and review are Hind Benfenatki, Gavin Kemp and Olivier Georgeon. The persons of INSA of Lyon in charge of producing the course are Frédérique Biennier, Nabila Benharkat. The person from INSA of Lyon involved in preparing, translation and review is Youakim Badr. Disclaimer The information in this document is subject to change without notice. All rights reserved. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use, which may be made of the information contained therein.

2 Introduction to migration to cloud Objectives Define the fundamental concepts that are associated to cloud computing and migration to the cloud, identifying the most relevant opportunities and general benefits Note: due to intellectual property reasons, the logotype of UCBL must remain in all utilisation of this course content, as well as the note copyright DUNOD mentioned in some slides with figures.

3 Module 1 general OVERVIEW Introduction: Concepts of cloud computing and SaaS Part 1: Go or no go to cloud computing? Part 2: Decision-makers point of view Part 3: Available SaaS offers Part 4: Platforms for cloud computing Part 5: Infrastructures for cloud computing Conclusions Transversal part: Communication

4 Introduction to migration to cloud Introduction

5 INTRODUCTION OVERVIEW 1. Context of the experience of cloud computing 2. Concepts and definitions of cloud computing 3. SaaS: A new software model

6 1. CONTEXT OF THE EXPERIENCE OF CLOUD COMPUTING

7 Cycle of Software Interfaces Centralized Passive Client Decentralized Mainframe Thick Client Browser <HTML> Web Server Copyright DUNOD Data Server

8 The rise of Web Web standards (HTTP, HTML) 1990 by Tim Berners Lee Initial idea was creating an online encyclopedia (in the manner of Wikipedia) Window/showcase/display Sites Transactional Sites: electronic commerce 1990 Real Software applications Change in software evolution: innovations are tested by large public (for example the search engines) before being used by the companies

9 The emergence of ASP (Application Service Providers) Propose to companies to rent business applications hosted in server centers Permit to software editors regular income due to subscription system Permit to user companies to get rid of the problems of exploitation/operating of their applications Two alternatives: use a web interface, use client/server interface

10 Technical insufficients of ASP Company A Users Company B Users Browser Client/ server Unique Application Frustrating Interface Unique Access Control System Unique Database Copyright DUNOD Interface requiring a deployment

11 RIA, new opportunity for hosted applications 2003 Rich Client: capacity to be enriched compared to thin client Two categories: RIA (Rich Internet Application) rich client based on the navigators and successor of web applications RDA (Rich Desktop Application) rich client installed on work station and successor of client/server applications

12 Functioning of RIA Deployment of the interface at each use Non persistence Interface Services Invocation Browser + JavaScript or Plug-in Exchange by HTTP Data Persistence No offline management User Copyright DUNOD Server

13 RIA Major fault of RIA: absence of disconnected mode management Available RIA technologies: Ajax, based on JavaScript standard (based on standards) Adobe Flash (multi-media) Microsoft Silverlight (multi-media)

14 RIA serving Cloud Computing Centralized Decentralized Web solution benefiting f rom decentralized cl Passive Client ient/server architecture Mainframe Thick Client Data Server Browser <HTML> Web Server Browser 14 Copyright DUNOD Web Server

15 Disconnected mode management Four solution for disconnected mode management: Be always connected: 3G+, wifi Use an extension of browser which manage the disconnected mode: Google Gears Use a new generation of navigators with management of disconnected mode: WATWG Use a synchronization software: Live Mesh

16 Web 2.0 Concept Collective Intelligence Wikipedia Amazon Book review system Music Database CDDB The blogosphere Digital natives Users platform: Youtube, Google Spreadsheet Services platform: mashups Continuous evolution principle: perpetual beta

17 The new terminals Mobile devices PC tablets netbooks Electronic books Smartphones Characteristics Variable Ergonomics Diverse technical bases Variable storage capacity Variable access rapidity to Interne Privilege hosted applications

18 Thick Client Hosted Application Synchronization when both devices are available crash PC on Application always available Mobile Device Reference document loaded from the server What is the right document? PC off PC off Copyright DUNOD Mobile Device Mobile Device

19 Ubimedia: ambient intelligence A concatenation of ubiquitous computing, and physically-linked hypermedia Copyright DUNOD

20 Capitalization of all previous evolutions Collaboration between applications Access by communicating objects Collaboration between users Browser Update on the fly Browser Mobile device Copyright DUNOD Communicating object

21 2. CONCEPTS AND DEFINITIONS OF CLOUD COMPUTING

22 THE MEANING OF CLOUD COMPUTING Users Cloud Computing means online applications are used as if they were in the ether, in an area without physical reality Everything as a Service, including the concepts of Software as Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS)

23 THE MEANING OF SAAS Enterprise A Users A Browser Enterprise B Users B Browser 23 Copyright DUNOD

24 SaaS characteristics Limited configuration and customization Accelerated feature delivery Use of open integration protocols Collaborative and social functionalities Software as a Service definition will be more detailed in part 3 of this module

25 SaaS SaaS are the successors of ASP. They differ from the latter by: Usage of RIA Interfaces Multi-tenants architecture dedicated and optimized for online usage Highlighting collaborative functions Providing Open API

26 CLOUD COMPUTING VERSUS COMPANY S PLATFORM Internal Computing Software Software Package Collaboration: Exchange Lotus ERP: SAP Local Hosting Specific Development Company s platforms: JEE.NET Cloud Computing SaaS Collaboration: Google Apps ERP: Salesforce Cloud Hosting PaaS: Amazon EC2 Force.com Google App Engine Microsoft Azure 26.

27 SaaS: a logic evolution of Software Towards outsourcing of resources Towards opening of companies on the web Copyright DUNOD

28 3. SAAS: A NEW SOFTWARE MODEL

29 Evolution of software economic models 1970 s Mainframe Model Traditional software Model Open Source Model Outsourcing Model Outsourcing by editor Model Web Model SaaS Model

30 Comparative synthesis of software models Copyright DUNOD

31 PERTINENCE OF SAAS MODEL VERSUS SOFTWARE MODEL Software price Software maintenance price of user Software maintenance price of server Work stations price Servers price

32 SaaS and Open Source SaaS and Open Source bases Code opening of SaaS applications SaaS and Open source: a model for companies?

33 Principal References Cloud Computing et SaaS, Guillaume Plouin, Dunod, 2009, ISBN , some of the schemas and figures of this course are extracted from this book, an authorization has been requested by Course of Parisa Ghodous, University Lyon 1, Master Technologies of Information and Master CCI Course of Catarina Ferreira Da Silva and of Mahmoud Barhamgi, Technology University Diploma in Informatics of the University Lyon 1

34 Other References Cloud Computing Bible, Barrie Sosinsky, Wiley, Video Cloud Computing: Theory and Practice, Dan Marinescu, 2013 NIST Cloud Computing Reference Architecture, Liu et. al Conferences: IEEE CLOUD ACM Symposium on Cloud Computing (SOCC) Cloud Computing IARIA

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