1. Cloud Computing & Building Multi-tier Web Applications in Virtual Environments

2. Outline Virtualization Cloud Computing Microsoft Azure Platform
Multi-tier Architecture
Deployment – Azure, Amazon EC2, UAkron CS VMs

3. Cloud Computing
Computing technology and infrastructure offered by vendors on demand.
Based on virtualization techniques, hence offers the benefits of virtualization
Services consumed based on pay per use model
No up-front cost
No commitment

4. Virtualization

5. Virtualization
Multiple virtual servers run on a host hardware (a server, a server farm or a data center).
Share hardware by dividing resources (CPUs, RAM, hard disks, network).
A Virtual Machine (VM) is an isolated software container which runs its own operating systems and applications behaving like a physical computer.
VMs reside on hypervisors which give direct access to the hardware

6. Hypervisors
Hypervisors are virtual machine managers (VMM), they are the OS of the OS. Two types of hypervisors: Type 1: native (bare metal), run directly on host hardware. Type 2: hosted, run on a host OS

7. Type 2 Hypervisors
Host OS based: a VM runs as an application on the host OS.
Examples: Parallels for Mac, VirtualBox.
Slow, three-layers of OS: host OS, hypervisor, guest OS.

8. Virtualization: Type 2 Hypervisor
Guest OS VM
Hypervisor
Host Apps
Host OS
Hardware

9. Virtualization: Type 1
Directly runs on the host hardware (bare metal).
Faster, removed one layer of OS (the host OS).
Type 1 hypervisors:
Microsoft Hyper-V
VMware ESX
Citrix’s Xen

10. Virtualization
OS1
OS2 …
OS40
VM1
VM2 …
VM40
Hypervisor
Hardware

11. Virtualization Advantages
Cost-effective
Less hardware and require less space.
Reduce power consumption.
Reduced server maintenance.
Maximum resource utilization
Flexibility
VMs are independent of each other.
Reconfigured, removed and restored easily.
Highly available.
Disaster recovery, server crashes and software upgrades by copying image files to another machines

12. Cloud Computing

13. Cloud Computing
Computing technology and infrastructure offered by vendors on demand.
Based on virtualization techniques, hence offers the benefits of virtualization
Services consumed based on pay per use model
No up-front cost
No commitment

14. Cloud Computing Services offered as
Software as a Service (SaaS)
Web services, Google Apps
Platform as a Service (PaaS)
Microsoft Azure, Google App Engine
Infrastructure as a Service (IaaS)
Amazon’s Elastic Compute Cloud, Microsoft Azure VM role instance

15. Why Cloud Computing? Virtualization benefits No hardware requirements
Cost-effective, reliable, flexible and portable
No hardware requirements
Vendor worry about software upgrades and hardware failures
Highly available
Application installed in the cloud - data centers
Access via internet browser
Large-capacity storage and high performance computing
Add resources on-demand, scalable

16. Cloud Vendors Microsoft Azure Platform Amazon
Windows Azure Compute and Storage
SQL Azure
Windows Azure AppFabric
Amazon
Elastic Compute Cloud
Simple Storage Service
Relational Database Service
Elastic Load Balancing

17. Cloud Computing
Salesforce.com

18. Microsoft Azure Platform

19. Professional Web Service Examples
Microsoft Azure:
Education:
Students:
Free Courses:

20. Microsoft Azure Platform
Provides developers with on-demand compute, storage, networking and content delivery capabilities to host, scale and manage Web applications on the Internet through Microsoft data centers
Hosted in Microsoft data centers
North America, Europe, Asia, available in 40 countries
An operating system for the Web?
Supports .NET, Java, PHP, Ruby
3 Month Free:

21. Microsoft Azure Components
Handles administrative tasks – installing software updates, applying patches,
Scalable – add or remove VMs to handle traffic
Handles load balancing and resource management when more than two instances is used

22. Windows Azure Compute Windows environment for running applications
Windows Server 2008R2
Platform as a Service
Web Role
Front end
Pre-configured IIS
Host applications
Worker Role
No IIS
Background processing
Windows services
Host WCF or Web Services
Compute service is built on one or more roles
Depending on number of CPUs, CPU frequency, memory size and storage capacity instances could be Extra small, small, medium, large, extra large

23. Windows Azure Storage Handles large data Highly scalable
10TB
Highly scalable
Replicated and maintains
multiple copies
Fault tolerant
Highly available
Secure
Storage Types
Blobs
Tables
Queues
Blobs data objects can be as large as 50GB.
Storage account have multiple Containers, which are referred to a set of blobs
Tables store data in structured manner and has partition key and row key
Data stored in tables and tables have multiple entities or rows to store set of properties.

24. Fabric Controller Part of Windows Azure
Applications are designed to run on multiple VMs
Controls and manages virtual machines
Creates new instance by allocating resources
Monitors instances
Switches from one instance to another
Hardware failure
Software crashes
No downtime

25. Sql Azure Cloud based database service Built on Microsoft SQL Server
Relational database
Reporting capabilities
Data Sync services
Built on Microsoft SQL Server
Similar to SQL Server 2008
Web interface to manage the database
Supported T-SQL features
Tables, views, joins, constraints, indexes, triggers,
DDL, DML queries
Stored procedures, user defined function
Supports SQL server authentication
Cloud version of ssrs
SQL Azure does not support distributed queries, transactions, global temp tables, system tables and configuration options, replication, mirroring, SSIS, SQL agent and jobs

26. Windows Azure AppFabric
Provides middleware platform
Caching
Improves performance
Distributed in-memory application cache
Session state management
Access Control
Identity and access control to applications
Simplifies authentication and authorization
Service Bus
Secure messaging
Communicate between distributed applications

27. Web App on the cloud Three-tier Architecture
(4->3, WebServer/WebClient combined)
Azure three-tier design
PhotoGallery Application
Deployment on Microsoft Azure

28. Three-Tier System Architecture

29. Cloud Application Design

30. Web Roles Hosts PhotoGallery Cloud Application
Pre-configured IIS
Use http or https endpoints
Exposed to outside world
Processes http page requests
Can communicate with worker roles
Highly scalable and load balanced automatically
Configure number of instances and VM size

31. Images and Data Storage
Blob Storage
Stores product images and thumbnails
SQL Azure
Stores product and customer information
Has URL to product images

32. Summary Virtualization Cloud Computing VMs on Host Hardware
Type 1: native
Type 2: hosted
Cloud Computing
IaaS
PaaS
SaaS
On-demand
Pay per use