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Cloud Architecture
Muhammad Adeel Javaid (Microsoft Cloud Partner)
IntroductionIntroduction
High performance networks and advanced
development of internet is the basis for cloud
computing .
Cloud computing has started taking shape
incorporating virtualization and on demand
deployment and internet delivery of services.
Cloud is a pool of virtualized computer
resources networked, which can:
Host a variety of workloads.
Batch-style back-end jobs.
Interactive user-facing applications.
Workloads can be deployed and scaled out quickly
through the rapid provisioning of virtual machines or
physical machines.
Support redundant, self recovering, highly scalable
programming models that allow workloads to recover
from many unavoidable hardware / software failures.
Monitor resource use in real time to enable
rebalancing of allocations when needed.
IntroductionIntroduction
Cloud Computing Stack of ServicesCloud Computing Stack of Services
Cloud Clients
Cloud Applications
Cloud Services
Cloud StorageCloud Platform
Cloud Infrastructure
Distributed Multi-site Physical
Infrastructure
enabled by server virtualization
Architectural Layers of CloudArchitectural Layers of Cloud
ComputingComputing
In the cloud computing stack, there are three basic
layers
that together create cloud environment. They are:
1.Infrastructure as a Service(IaaS)
2.Platform as a Service (PaaS)
3.Software as a Service (SaaS)
SaaS
PaaS
IaaS
Framework of cloud computingFramework of cloud computing
Virtualized resources
Compute Networking
Storage
Image Metadata
Image
Virtualized images
Software kernel (OS. VM Manager)
Hardware
Application
Platform
Infrastructure
Basic middleware
(database services , application server )
Developments tools
Services and built in functionality
Virtual infrastructure managementVirtual infrastructure management
and Cloud Computingand Cloud Computing
For building the cloud environment a variety of
requirements must be met to provide a uniform and
homogeneous view of the virtualized resources.
Virtual Infrastructure Management is the key
component to build the cloud environment which does
the dynamic orchestration of virtual machines on a pool
of physical resources.
Virtual infrastructure management provide primitives
to schedule and manage VMs across multiple physical
hosts.
Cloud management provide remote and secure
interface for creating controlling and monitoring
virtualized resources on IaaS.
Virtual infrastructureVirtual infrastructure
management and Cloudmanagement and Cloud
ComputingComputing
View of Cloud DeploymentView of Cloud Deployment
Cloud
Application
Client
Infrastructure
Application
PaaS
VirtualizedApplication
Platform
Service
IaaS
Infrastructure
Storage
SaaS
Software as a ServiceSoftware as a Service
 It is a Deployment/Delivery model
• Hosted and managed by vendor
• Delivered across the internet
 It is a Business Model : usage-based pricing(vs.
perpetual license model of on –premise
software).Examples:
• Per user per month
• Per transaction
• Per GB of storage per month
Software as a ServiceSoftware as a Service
Architectural
 Multi-tenancy
 Scalability
 Security
 Performance
Functional
 Provisioning
 Billing
 Metering
 Monitoring
MULTI-TENANCYMULTI-TENANCY
 Multi-tenancy is an architectural pattern
 A single instance of the software is run on the service
provider’s infrastructure
 Multiple tenants access the same instance.
 In contrast to the multi-user model, multi-tenancy
requires customizing the single instance according to
the multi-faceted requirements of many tenants.
A Multi-tenants application lets customers (tenants)
share the same hardware resources, by offering them
one shared application and database instance ,while
allowing them to configure the application to fit there
needs as if it runs on dedicated environment.
These definition focus on what we believe to be the key
aspects of multi tenancy:
1.The ability of the application to share hardware
resources.
2.The offering of a high degree of configurability of the
software.
3.The architectural approach in which the tenants make
use of a single application and database instance.
MULTI-TENANCYMULTI-TENANCY
Multi-tenants Deployment ModesMulti-tenants Deployment Modes
for Application Serverfor Application Server
Tenant A
Fully isolated Application server
Each tenant accesses an application
server running on a dedicated servers.
Virtualized Application Server
Each tenant accesses a dedicated
application running on a separate virtual
machine.
Shared Virtual Server
Each tenant accesses a dedicated
application server running on a shared
virtual machine.
Shared Application Server
The tenant shared the application server
and access application resources
through separate session or threads.
Tenant B
Application Server
Application server
Virtual
machine
Virtual
machine
Application server
Tenant A
Tenant B
Virtual
machine
Tenant A
Tenant B
Session thread
Session Thread
Application Server
Tenant A
Tenant B
Application server
Multi-tenants Deployment Modes in Data CentersMulti-tenants Deployment Modes in Data Centers
Fully isolated data center
The tenants do not share any
data center resources
Virtualized servers
The tenants share the same
host but access different
databases running on separate
virtual machines
Shared Server
The tenants share the same
server (Hostname or IP) but
access different databases
Shared Database
The tenants share the same
server and database (shared or
different ports) but access
different schema(tables)
Shared Schema
The tenants share the same
server, database and schema
(tables). The irrespective data
is segregated by key and rows.
Tenant A
Tenant B
Tenant A
Tenant B
Tenant A
Tenant B
Virtual
Machine Database
Virtual
Machine
Database
Tenant A
Tenant B
Tenant A
Tenant B
Conceptual framework of Software as a ServiceConceptual framework of Software as a Service
Presentation Menu and Navigation User Controls Display and Rendering Reporting
Security
Identity and
federation
Authentication and
Single Sign on
Authorization and
Role-based Access
Control
Entitlement
Encryption
Regularity Controls
Operation
Monitoring and
Altering
Backup and Restore
Provisioning
Configuration and
Customization
Performance and
Availability
Metering and Indicators
Infrastructure
Database Storage Computer Networking and
Communications
Application Engine
User Profile
Notification and
Subscription
Metadata
Execution
Engine
Metadata
Services
Messaging
Workflow
Execution
Handling
Orchestration
Data
Synchronization
Migrating to Cloud EnvironmentMigrating to Cloud Environment
The Software can be redeployed in cloud
environment as Software as a Service (SaaS).
The main sections of the software can be
mapped to the SaaS architecture.
Payroll Processing in CloudPayroll Processing in Cloud
ComputingComputing
Many State Government departments are utilizing
standardized set up of payroll packages which are
deployed at user locations and it is amounting huge
investment on procurement of hardware and software
and maintenance for various locations of the
organization.
Payroll Software Installed at more thanPayroll Software Installed at more than
300 locations300 locations
User Software Module
Standalone Loaded on PC
DrawbacksDrawbacks
Drawbacks :
 Software Maintenance problems.
 Individual Hardware is required.
 Often Data Loss occurs.
Migrating the payroll package, to cloud
environment can be worked out without
changing business logic.
IN CLOUDIN CLOUD
User-1
Software
Module
User-1 User-3
Single Instance
Multi-tenancy
Architectural Overview for Multi-tenancyArchitectural Overview for Multi-tenancy
Client
Authentication
Authentication Module
Ticket Server
Session Ticket
Tenant Token
+ Create Ticket()
Tenant Auth
Data
Tenant
Config
Data
Layout Component
Configuration Component
File I/O Component
Workflow Component
Database
Query Adjuster Load Balancer Record Initializer
Database Pool
Data Data Data
Single-tenant
business logic
Query
Create Ticket()
HTTP
Request
Configuration
Provisioning for new tenants
• For Separate server model new machine is to be
installed.
• For separate database model create a database
start it on a server.
• For separate schema and shared schema models
scripts / stored procedure could create new
schema in one of the existing databases.
Background of the ApplicationBackground of the Application
The existing application, which is implemented in state
government departments, is having the following main
sections:
 
 Data admin
 Master data entry
 Month process
 Token no. entry
 Reports
 Back up to system
The existing package is deployed in the user premises and
found difficult in regular software maintenance and
overhead costs for the infrastructure requirements.
 
The application is ideally suited to deploy in cloud
environment with following features:
 
 The application can be taken up as a single instance and multi-
tenant model
 Configurability option in the software is required to be provided.
Configurability in SaaS enables the flexibility to access the software
by many tenants with the option of configuring each tenant for
their application needs.
 The software will have configurability for the following :
1.User interface.
2.Workflow.
3.Data.
4.Access control. 
User requirements / Use cases Type of environment in cloud Impact
Payroll processing IaaS (VM)
Cloud storage and
SaaS
1. Processing time will be reduced.
2. Hardware requirements will be
reduced.
3. Number of users can be
increased with scalability.
4. Maintenance cost will be
reduced.
Project Management PaaS and Cloud storage 1. Processing time can be reduced.
2. Project execution time and cost
can be reduced.
3. Efficient way of utilization of skill
sets and manpower can be attained.
e-Governance & Office automation IaaS
Cloud storage
SaaS
1. Hardware cost can be reduced.
2. CPU processing time can be
reduced.
3. Accountability can be maintained.
4. Maintainance cost can be
reduced.
5. Reduces energy consumption.
e-Learning Cloud storage
IaaS
PaaS
SaaS
1. Hardware cost can be reduced.
2. CPU processing time can be
reduced.
3. Accountability can be maintained.
4. Maintainance cost can be
reduced.
SaaS ApplicationsSaaS Applications
SOA and Cloud Computing
In cloud environment we adopt the bundling of
resources into layers of
Saas
Paas
Iaas
And furthur add a layer for business process
management with the concept of service oriented
architecture(SOA).
SOA is a base for furthur building of cloud environment
for composite application with work flow concepts.
Cloud architecture

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Cloud architecture

  • 1. Cloud Architecture Muhammad Adeel Javaid (Microsoft Cloud Partner)
  • 2. IntroductionIntroduction High performance networks and advanced development of internet is the basis for cloud computing . Cloud computing has started taking shape incorporating virtualization and on demand deployment and internet delivery of services.
  • 3. Cloud is a pool of virtualized computer resources networked, which can: Host a variety of workloads. Batch-style back-end jobs. Interactive user-facing applications. Workloads can be deployed and scaled out quickly through the rapid provisioning of virtual machines or physical machines. Support redundant, self recovering, highly scalable programming models that allow workloads to recover from many unavoidable hardware / software failures. Monitor resource use in real time to enable rebalancing of allocations when needed. IntroductionIntroduction
  • 4. Cloud Computing Stack of ServicesCloud Computing Stack of Services Cloud Clients Cloud Applications Cloud Services Cloud StorageCloud Platform Cloud Infrastructure Distributed Multi-site Physical Infrastructure enabled by server virtualization
  • 5. Architectural Layers of CloudArchitectural Layers of Cloud ComputingComputing In the cloud computing stack, there are three basic layers that together create cloud environment. They are: 1.Infrastructure as a Service(IaaS) 2.Platform as a Service (PaaS) 3.Software as a Service (SaaS) SaaS PaaS IaaS
  • 6. Framework of cloud computingFramework of cloud computing Virtualized resources Compute Networking Storage Image Metadata Image Virtualized images Software kernel (OS. VM Manager) Hardware Application Platform Infrastructure Basic middleware (database services , application server ) Developments tools Services and built in functionality
  • 7. Virtual infrastructure managementVirtual infrastructure management and Cloud Computingand Cloud Computing For building the cloud environment a variety of requirements must be met to provide a uniform and homogeneous view of the virtualized resources. Virtual Infrastructure Management is the key component to build the cloud environment which does the dynamic orchestration of virtual machines on a pool of physical resources.
  • 8. Virtual infrastructure management provide primitives to schedule and manage VMs across multiple physical hosts. Cloud management provide remote and secure interface for creating controlling and monitoring virtualized resources on IaaS. Virtual infrastructureVirtual infrastructure management and Cloudmanagement and Cloud ComputingComputing
  • 9. View of Cloud DeploymentView of Cloud Deployment Cloud Application Client Infrastructure Application PaaS VirtualizedApplication Platform Service IaaS Infrastructure Storage SaaS
  • 10. Software as a ServiceSoftware as a Service  It is a Deployment/Delivery model • Hosted and managed by vendor • Delivered across the internet  It is a Business Model : usage-based pricing(vs. perpetual license model of on –premise software).Examples: • Per user per month • Per transaction • Per GB of storage per month
  • 11. Software as a ServiceSoftware as a Service Architectural  Multi-tenancy  Scalability  Security  Performance Functional  Provisioning  Billing  Metering  Monitoring
  • 12. MULTI-TENANCYMULTI-TENANCY  Multi-tenancy is an architectural pattern  A single instance of the software is run on the service provider’s infrastructure  Multiple tenants access the same instance.  In contrast to the multi-user model, multi-tenancy requires customizing the single instance according to the multi-faceted requirements of many tenants.
  • 13. A Multi-tenants application lets customers (tenants) share the same hardware resources, by offering them one shared application and database instance ,while allowing them to configure the application to fit there needs as if it runs on dedicated environment. These definition focus on what we believe to be the key aspects of multi tenancy: 1.The ability of the application to share hardware resources. 2.The offering of a high degree of configurability of the software. 3.The architectural approach in which the tenants make use of a single application and database instance. MULTI-TENANCYMULTI-TENANCY
  • 14. Multi-tenants Deployment ModesMulti-tenants Deployment Modes for Application Serverfor Application Server Tenant A Fully isolated Application server Each tenant accesses an application server running on a dedicated servers. Virtualized Application Server Each tenant accesses a dedicated application running on a separate virtual machine. Shared Virtual Server Each tenant accesses a dedicated application server running on a shared virtual machine. Shared Application Server The tenant shared the application server and access application resources through separate session or threads. Tenant B Application Server Application server Virtual machine Virtual machine Application server Tenant A Tenant B Virtual machine Tenant A Tenant B Session thread Session Thread Application Server Tenant A Tenant B Application server
  • 15. Multi-tenants Deployment Modes in Data CentersMulti-tenants Deployment Modes in Data Centers Fully isolated data center The tenants do not share any data center resources Virtualized servers The tenants share the same host but access different databases running on separate virtual machines Shared Server The tenants share the same server (Hostname or IP) but access different databases Shared Database The tenants share the same server and database (shared or different ports) but access different schema(tables) Shared Schema The tenants share the same server, database and schema (tables). The irrespective data is segregated by key and rows. Tenant A Tenant B Tenant A Tenant B Tenant A Tenant B Virtual Machine Database Virtual Machine Database Tenant A Tenant B Tenant A Tenant B
  • 16. Conceptual framework of Software as a ServiceConceptual framework of Software as a Service Presentation Menu and Navigation User Controls Display and Rendering Reporting Security Identity and federation Authentication and Single Sign on Authorization and Role-based Access Control Entitlement Encryption Regularity Controls Operation Monitoring and Altering Backup and Restore Provisioning Configuration and Customization Performance and Availability Metering and Indicators Infrastructure Database Storage Computer Networking and Communications Application Engine User Profile Notification and Subscription Metadata Execution Engine Metadata Services Messaging Workflow Execution Handling Orchestration Data Synchronization
  • 17. Migrating to Cloud EnvironmentMigrating to Cloud Environment The Software can be redeployed in cloud environment as Software as a Service (SaaS). The main sections of the software can be mapped to the SaaS architecture.
  • 18. Payroll Processing in CloudPayroll Processing in Cloud ComputingComputing Many State Government departments are utilizing standardized set up of payroll packages which are deployed at user locations and it is amounting huge investment on procurement of hardware and software and maintenance for various locations of the organization.
  • 19. Payroll Software Installed at more thanPayroll Software Installed at more than 300 locations300 locations User Software Module Standalone Loaded on PC
  • 20. DrawbacksDrawbacks Drawbacks :  Software Maintenance problems.  Individual Hardware is required.  Often Data Loss occurs.
  • 21. Migrating the payroll package, to cloud environment can be worked out without changing business logic.
  • 22. IN CLOUDIN CLOUD User-1 Software Module User-1 User-3 Single Instance Multi-tenancy
  • 23. Architectural Overview for Multi-tenancyArchitectural Overview for Multi-tenancy Client Authentication Authentication Module Ticket Server Session Ticket Tenant Token + Create Ticket() Tenant Auth Data Tenant Config Data Layout Component Configuration Component File I/O Component Workflow Component Database Query Adjuster Load Balancer Record Initializer Database Pool Data Data Data Single-tenant business logic Query Create Ticket() HTTP Request Configuration
  • 24. Provisioning for new tenants • For Separate server model new machine is to be installed. • For separate database model create a database start it on a server. • For separate schema and shared schema models scripts / stored procedure could create new schema in one of the existing databases.
  • 25. Background of the ApplicationBackground of the Application The existing application, which is implemented in state government departments, is having the following main sections:    Data admin  Master data entry  Month process  Token no. entry  Reports  Back up to system The existing package is deployed in the user premises and found difficult in regular software maintenance and overhead costs for the infrastructure requirements.  
  • 26. The application is ideally suited to deploy in cloud environment with following features:    The application can be taken up as a single instance and multi- tenant model  Configurability option in the software is required to be provided. Configurability in SaaS enables the flexibility to access the software by many tenants with the option of configuring each tenant for their application needs.  The software will have configurability for the following : 1.User interface. 2.Workflow. 3.Data. 4.Access control. 
  • 27. User requirements / Use cases Type of environment in cloud Impact Payroll processing IaaS (VM) Cloud storage and SaaS 1. Processing time will be reduced. 2. Hardware requirements will be reduced. 3. Number of users can be increased with scalability. 4. Maintenance cost will be reduced. Project Management PaaS and Cloud storage 1. Processing time can be reduced. 2. Project execution time and cost can be reduced. 3. Efficient way of utilization of skill sets and manpower can be attained. e-Governance & Office automation IaaS Cloud storage SaaS 1. Hardware cost can be reduced. 2. CPU processing time can be reduced. 3. Accountability can be maintained. 4. Maintainance cost can be reduced. 5. Reduces energy consumption. e-Learning Cloud storage IaaS PaaS SaaS 1. Hardware cost can be reduced. 2. CPU processing time can be reduced. 3. Accountability can be maintained. 4. Maintainance cost can be reduced. SaaS ApplicationsSaaS Applications
  • 28. SOA and Cloud Computing In cloud environment we adopt the bundling of resources into layers of Saas Paas Iaas And furthur add a layer for business process management with the concept of service oriented architecture(SOA). SOA is a base for furthur building of cloud environment for composite application with work flow concepts.