Distributed Operating System

1. V.V. VANNIAPERUMAL COLLEGE FOR WOMEN
(An Autonomous Institution Affiliated to Madurai Kamaraj University)
VIRUDHUNAGAR
(Re-Accredited with “A” Grade (3 rd Cycle) by NAAC)
Online classes for
cloud computing
By
D.Shunmuga Kumari, M.Sc., M.Phil.,
Assistant Professor,
Department of information Technology,
18.08.2020 meet.google.com/zij-ngfi-ipm
V.V. VANNIAPERUMAL COLLEGE FOR WOMEN
(An Autonomous Institution Affiliated to Madurai Kamaraj University)
VIRUDHUNAGAR
(Re-Accredited with “A” Grade (3 rd Cycle) by NAAC)

2. Distributed Operating System
 A distributed operating system is a software over a collection of independent computer, interconnected
via networked, capable of collaborating on a task.
 Eg.,Telephone N/W, Celluar N/W, Internet, ATM Machines etc.,
 DS is loosely coupled- No share Memory
 Client / server technology. Client-can send request to perform an action. Server send back result to Client.
 Advantages
 Resources Sharing
Computation Speed up
Reliability
Communication- Email.

3. cloud computing
• Refers to manipulating, configuring and accessing the application through online.
• It offers online data storage, infrastructure and applications.
• Enabling convenient, on demand network access to a shared pool of configurable and reliable
computing resources
• (e.g network,servers,storages,applications,services)
• Provides access the applications over the internet.
• Allows to create, configure, customise the applications
through online

4. Grid Computing
• Grid computing is a collection of computer resources from multiple locations to reach common
goal.
• The grid can be thought as distributed system with non interactive workload that involve large
number of files.
• Computational grid is a H/W And S/W infrastructure that divides dependable, consistent and
inexpensive access to end computational capabilities.(PC,WS, Server, Storage elements)
• Collection of computer s/w is called middle ware

5. Peer-Peer Model
• Unlike Client-Server ,P2P model does not distinguish between
Client/Server.
• Each node either be a client or server depending on whether the
node is requesting od providing the service.
• Each node is considered as a Peer.
• Pattern of communication between
them depends entirely on application
requirements.

6. System Models for Distributed & Cloud Computing
III. Peer-Peer Model

7. Challenges in P2P

8. IV. Cloud computing Over Internet.

9. Cloud computing
• Virtualized resources

10. Iaas, PaaS, Saas Providers

11. Iaas, PaaS, Saas Providers
• IaaS:
• This model put together infrastructures demanded by Users.
• Namely Servers, Storage, Networks, Datacenter fabric.
• PaaS:
• This enables the users to deploy user built applications on to virtualized
cloud Platform.
• Includes Middle ware, databases, development tools.
• SaaS:
• Refers to browser initiated application software over thousands of paid cloud
customer.
• Applies Business Model,CRM,ERP,HR applications