WORKFLOWS IN CLOUD COMPUTING. CLOUD COMPUTING Delivering applications or services in on-demand...

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

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