WORKFLOWS IN CLOUD COMPUTING
CLOUD COMPUTING

Delivering applications or services in on-demand environment

Hundreds of thousands of users / applications
•
Systems should be fast, secure and available
•
All services and associated data

Intelligent infrastructure:

Transparency

Scalability

Monitoring

Security
CHARACTERSTICS OF CLOUD COMPUTING

Ultra large scale

Virtualization

High reliability

Versatility

High extendibility

On demand service

Extremely inexpensive

Distributional

Dynamic exxtendability
FEATURES OF CLOUD COMPUTING

Scalability on Demand

Streamlining the Data Center

Improving Business Processes

Minimizing Startup Costs

On-demand service provision

Service-oriented

User-centric interfaces

QoS guaranteed offer
APPLICATION OF CLOUD COMPUTING : GOOGLE APPs
CHALLENGES OF CLOUD COMPUTING

Security

Fault tolerance

Load balancing

Energy efficiency

Scheduling algorithms
DEFINITION OF WORKFLOW
“the automation of a business process, in whole or part, during which documents,
information or tasks are passed from one participant to another for action,
according to a set of procedural rules.
OPERATIONAL ASPECT OF WORKFLOW

how tasks are structured,

who performs them,

what their relative order is,

how they are synchronized,

how information flows to support the tasks and

how tasks are being tracked
EXAMPLE OF WORKFLOW :
DEFINITION OF WORKFLOW MANAGEMENT SYSTEM
The workflow system comprises the workflow engine, a resource broker and plug-ins
for communicating with various technological platforms, The Cloudbus Workflow
Management System consists of components that are responsible for handling
tasks, data and resources taking into account users’ QoS requirements. The
architecture consists of three major parts:

User interface

The core.

The Plug-ins
ADVANTAGES OF WORKFLOW MANAGEMENT SYSTEM

describing complex scientific procedures

automating data derivation processes

high-performance computing (HPC) to improve throughput and

performance

provenance management and query (persistence components)..
WORKFLOW SCHEDULING
It is a process that maps and manages the execution of inter-dependent tasks on
the distributed resources. It allocates suitable resources to workflow tasks such that
.
the execution can be completed to satisfy objective functions imposed by users
TYPES OF WORKFLOW SCHEDULING :
1.
BEST EFFORT BASED
2.
QUALITY OF SERVICE
TOOLS FOR WORKFLOW SCHEDULING

XCP

EUCALYPTUS

OPEN NEBULLA

AMAZON

HADOOP
THANK YOU