In the presentation overview of Service Level Agreement in Cloud Computing is discussed. Also introduction to Cloud Computing, and its benefits are too discussed.
This presentation will help you all a lot.
because this is not from a particular text book or a reference guide it is a collection of several web sites.
In the presentations definition of SLA, its types and life cycle of SLA is discussed or explained in the session. For Live video you can listen to me on https://www.youtube.com/user/neeleshcmc
Provides a simple and unambiguous taxonomy of three service models
- Software as a service (SaaS)
- Platform as a service (PaaS)
- Infrastructure as a service (IaaS)
(Private cloud, Community cloud, Public cloud, and Hybrid cloud)
Introduction to Cloud Computing, Roots of Cloud Computing ,Desired Features of Cloud Computing ,Challenges and Risks ,Benefits and Disadvantages of Cloud Computing
This presentation will help you all a lot.
because this is not from a particular text book or a reference guide it is a collection of several web sites.
In the presentations definition of SLA, its types and life cycle of SLA is discussed or explained in the session. For Live video you can listen to me on https://www.youtube.com/user/neeleshcmc
Provides a simple and unambiguous taxonomy of three service models
- Software as a service (SaaS)
- Platform as a service (PaaS)
- Infrastructure as a service (IaaS)
(Private cloud, Community cloud, Public cloud, and Hybrid cloud)
Introduction to Cloud Computing, Roots of Cloud Computing ,Desired Features of Cloud Computing ,Challenges and Risks ,Benefits and Disadvantages of Cloud Computing
Cloud Computing offers an on-demand and scalable access to a shared pool of resources hosted in a data center at providers’ site. It reduces the overheads of up-front investments and financial risks for the end-user. Regardless of the fact that cloud computing offers great advantages to the end users, there are several challenging issues that are mandatory to be addressed.
Cloud computing & energy efficiency using cloud to decrease the energy use in...Puru Agrawal
Cloud can be used to decrease the energy use in large companies. This presentation deals with a model which explains as how cloud can be used to decrease the energy uses. This is a field related to green computing and minimum use of energy resources.
Cloud Computing Technology
Cloud Architecture
Cloud Modeling and Design
Foundation Grid
Cloud and Virtualization
Virtualization and Cloud Computing.
Cloud Lifecycle model
A quick look at how the term Cloud originated, What is Cloud Computing? Cloud Infrastaructure, Cloud: Platforms, Benefits, Challenges and Opptrunities of Cloud
Federated Cloud Computing - The OpenNebula Experience v1.0sIgnacio M. Llorente
The talk mostly focuses on private cloud computing to support Science and High Performance Computing environments, the different architectures to federate cloud infrastructures, the existing challenges for cloud interoperability, and the OpenNebula's vision for the future of existing Grid infrastructures.
Cloud computing is using the internet to access someone else's software running on someone else's hardware in someone else's data center.
OUTLINE-
Definitions of Cloud computing
Architecture of Cloud computing
Benefits of Cloud computing
Opportunities of Cloud Computing
Cloud computing – Google Apps
Grid computing vs Cloud computing
Topic The top 5 details that should be included in your cloud SLA..docxjuliennehar
Topic The top 5 details that should be included in your cloud SLA.
Read and respond to below two student’s discussions. (5-6 lines would be more sufficient) reflecting on your own experience, challenging assumptions, pointing out something new you learned, offering suggestions
#1.Posted by Krishnaveni
A service-level agreement (SLA) defines the level of service expected by a customer from a supplier, laying out the metrics by which that service is measured, and the remedies or penalties, if any, should the agreed-on service levels not be achieved. Usually, SLAs are between companies and external suppliers, but they may also be between two departments within a company. In my point of view below are five key things we need to consider.
Disaster recovery and backup
In the event of a disaster, our cloud provider should have a plan in place to prevent total loss of our data. Cloud providers should have a section of the SLA that describes their disaster recovery and backup solutions in detail. Depending on the provider, they may provide automatic backups and snapshots of our data. If the user is required to set up backup and recovery systems, the SLA should outline that. It may not specifically state how to activate them, but we should be aware if we need to activate them or not.
Data source.
“Where is the information coming from that will be used to measure the provider’s compliance?” In many situations, a customer may have to rely on the cloud provider to provide the information; however, increasingly, there are third parties that can help the customer with this. In a perfect world, the data should be auditable by the customer to verify the data’s accuracy, reliability and validity.
Acceptable performance.
This item specifies the minimum level of service that must be provided, and it answers the question, “What do we want from the provider for this particular service?” It flows from and is directly related to the customer’s objectives under the contract. In the cloud, many SLAs are expressed in terms of availability. For example, a SaaS provider may commit to an application availability of 99.5%.
Scalability
Many SLAs are designed to meet the needs of the customer at the time of signing, but we all know organizations can change dramatically in size over time. Make sure the SLA details intervals for reviewing a contract so that if our organization grows larger, our cloud capacity can grow with it (and if our organization happens to grow smaller, we’ll want the option to reduce capacity; no sense it paying for unused capacity).
Customer responsibilities
The SLA is a contract that outlines responsibilities that both the provider and customer agree to. Our cloud provider needs to inform us of what we’re liable for when we enter the agreement. It could be its own section or sprinkled throughout the agreement, but it must tell us what’s expected of us. Make sure we mull over the entirety of the SLA to know what our provider will manage and what we nee ...
Cloud Computing offers an on-demand and scalable access to a shared pool of resources hosted in a data center at providers’ site. It reduces the overheads of up-front investments and financial risks for the end-user. Regardless of the fact that cloud computing offers great advantages to the end users, there are several challenging issues that are mandatory to be addressed.
Cloud computing & energy efficiency using cloud to decrease the energy use in...Puru Agrawal
Cloud can be used to decrease the energy use in large companies. This presentation deals with a model which explains as how cloud can be used to decrease the energy uses. This is a field related to green computing and minimum use of energy resources.
Cloud Computing Technology
Cloud Architecture
Cloud Modeling and Design
Foundation Grid
Cloud and Virtualization
Virtualization and Cloud Computing.
Cloud Lifecycle model
A quick look at how the term Cloud originated, What is Cloud Computing? Cloud Infrastaructure, Cloud: Platforms, Benefits, Challenges and Opptrunities of Cloud
Federated Cloud Computing - The OpenNebula Experience v1.0sIgnacio M. Llorente
The talk mostly focuses on private cloud computing to support Science and High Performance Computing environments, the different architectures to federate cloud infrastructures, the existing challenges for cloud interoperability, and the OpenNebula's vision for the future of existing Grid infrastructures.
Cloud computing is using the internet to access someone else's software running on someone else's hardware in someone else's data center.
OUTLINE-
Definitions of Cloud computing
Architecture of Cloud computing
Benefits of Cloud computing
Opportunities of Cloud Computing
Cloud computing – Google Apps
Grid computing vs Cloud computing
Topic The top 5 details that should be included in your cloud SLA..docxjuliennehar
Topic The top 5 details that should be included in your cloud SLA.
Read and respond to below two student’s discussions. (5-6 lines would be more sufficient) reflecting on your own experience, challenging assumptions, pointing out something new you learned, offering suggestions
#1.Posted by Krishnaveni
A service-level agreement (SLA) defines the level of service expected by a customer from a supplier, laying out the metrics by which that service is measured, and the remedies or penalties, if any, should the agreed-on service levels not be achieved. Usually, SLAs are between companies and external suppliers, but they may also be between two departments within a company. In my point of view below are five key things we need to consider.
Disaster recovery and backup
In the event of a disaster, our cloud provider should have a plan in place to prevent total loss of our data. Cloud providers should have a section of the SLA that describes their disaster recovery and backup solutions in detail. Depending on the provider, they may provide automatic backups and snapshots of our data. If the user is required to set up backup and recovery systems, the SLA should outline that. It may not specifically state how to activate them, but we should be aware if we need to activate them or not.
Data source.
“Where is the information coming from that will be used to measure the provider’s compliance?” In many situations, a customer may have to rely on the cloud provider to provide the information; however, increasingly, there are third parties that can help the customer with this. In a perfect world, the data should be auditable by the customer to verify the data’s accuracy, reliability and validity.
Acceptable performance.
This item specifies the minimum level of service that must be provided, and it answers the question, “What do we want from the provider for this particular service?” It flows from and is directly related to the customer’s objectives under the contract. In the cloud, many SLAs are expressed in terms of availability. For example, a SaaS provider may commit to an application availability of 99.5%.
Scalability
Many SLAs are designed to meet the needs of the customer at the time of signing, but we all know organizations can change dramatically in size over time. Make sure the SLA details intervals for reviewing a contract so that if our organization grows larger, our cloud capacity can grow with it (and if our organization happens to grow smaller, we’ll want the option to reduce capacity; no sense it paying for unused capacity).
Customer responsibilities
The SLA is a contract that outlines responsibilities that both the provider and customer agree to. Our cloud provider needs to inform us of what we’re liable for when we enter the agreement. It could be its own section or sprinkled throughout the agreement, but it must tell us what’s expected of us. Make sure we mull over the entirety of the SLA to know what our provider will manage and what we nee ...
RUNNING HEAD Intersession 6 Final Project Projection1Interse.docxjeanettehully
RUNNING HEAD: Intersession 6 Final Project Projection 1
Intersession 6 Final Project Projection 5
Intersession 6 Final Project Projection
Shalini Kantamneni
Ottawa University
Intersession 6 Final Project Projection
The policies and service agreements
The acceptable use policy issued by the cloud service provider should restrict the use of his resources in unlawful and fraudulent activity. The cloud service provider is to maintain an extensive profile of the activities of the cloud service customer through logging to comply with the government's needs for auditing. The cloud service customer is to strictly abide by this policy for secure computing.
The processing of personal data by both the cloud service customer and the cloud service provider should portray compliance to the GDPR data protection standard (Surbiryala, Agrawal & Rong, 2018). Both parties are to be tasked with ensuring that the processing practices are in line with this and other laws that advocate for data protection. It is upon the cloud service customer to ensure that these laws and regulations are abided by and that the roles and responsibilities that are derived from an agreement between him and the cloud service provider do not hamper his plan.
The payment will be expected based on a pay-as-you-go schedule. The cloud service customer is to identify the services and architecture which he would require from the cloud computing environment and set these components apart from those he would not require. Charges are to be calculated based on the set of architecture utilized and the period within which the selected architecture is dedicated to his use.
The cloud service provider holds the privilege of temporarily suspending cloud services issued to a cloud service customer in the case that there are security risks, there is the delay in payments and if there is the abnormal use of cloud services that contradicts the agreement for fair use. It is the responsibility of the cloud service customer to ensure that he strictly abides by the agreement with the cloud service provider on the terms of use and the right of the cloud service provider to consistently monitor the activities of the cloud service customer to ensure compliance to this agreement.
The cloud service provider also holds the privilege of terminating or closing a cloud service customer’s account in the case that the cloud service customer does not commit himself to the sets of agreements made with the cloud service provider. The cloud service provider is to issue warnings that lead to temporary suspension before a notification is issued prior to account termination in the case that there are no changes after the temporary suspension.
The indemnification policy immunizes the cloud service provider from any sorts of claims issued by the cloud service customer that connects the cloud service provider to instances of damage or loss. It is the responsibility of the cloud service customer to ensure his compl ...
InfTo improve the quality of network performance through advanced communication
services and authorized users in equal access to state-of-the-art technology.
In the present atmosphere of tighter budgets and pressure on resources, many public sector organiza-tions, including local authorities, are outsourcing services to outer organizations under service level agreements in cloud computing. Cloud computing is an approach to convey facilitated benefits over the web. Services are available to the users relying upon cloud arrangement and the Service Level Agreement (SLA) between the service providers and the cli-ents. Service level agreements are being utilized inside associations, directing connection between various sections of the association. It requires a commitment from both parties to support and adhere to the agreement in order for the SLA to work effectively. In spite of the fact that it gives a straightforward view about the cloud condition, such as cloud services, cloud distribution, security issues, responsibilities, agreements and warranties of the services. However, there are several issues occur from incorrect SLA which can cause misunderstanding among service providers and clients. SLA checking device confirm the SLA effectively whether it deals with all administrations as per SLA. In this paper, we represent a SLA confirmation and checking process that can distinguish SLA verification in gathering the information. We consider IaaS (Infrastructure as a Service) parameters for SLA verification in Cloud.
A Profit Maximization Scheme with Guaranteed Quality of Service in Cloud Comp...1crore projects
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A FRAMEWORK FOR SOFTWARE-AS-A-SERVICE SELECTION AND PROVISIONINGIJCNCJournal
As cloud computing is increasingly transforming the information technology landscape, organizations and
businesses are exhibiting strong interest in Software-as-a-Service (SaaS) offerings that can help them
increase business agility and reduce their operational costs. They increasingly demand services that can
meet their functional and non-functional requirements. Given the plethora and the variety of SaaS
offerings, we propose, in this paper, a framework for SaaS provisioning, which relies on brokered Service
Level agreements (SLAs), between service consumers and SaaS providers. The Cloud Service Broker (CSB)
helps service consumers find the right SaaS providers that can fulfil their functional and non-functional
requirements. The proposed selection algorithm ranks potential SaaS providers by matching their offerings
against the requirements of the service consumer using an aggregate utility function. Furthermore, the CSB
is in charge of conducting SLA negotiation with selected SaaS providers, on behalf of service consumers,
and performing SLA compliance monitoring
Cloud computing - the impact on revenue recognitionPwC
By 2017 global cloud service providers are expected to generate approximately $235 billion of revenue from cloud computing services.
Telecom companies are searching for ways to save money, limit fixed costs and improve efficiencies. The use of cloud computing can help. However, challenges may arise specifically in revenue recognition patterns and costs associated when accounting for revenue generated for cloud services.
ADAPTIVE MULTI-TENANCY POLICY FOR ENHANCING SERVICE LEVEL AGREEMENT THROUGH R...IJCNCJournal
The appearance of infinite computing resources that available on demand and fast enough to adapt with
load surges makes Cloud computing favourable service infrastructure in IT market. Core feature in Cloud
service infrastructures is Service Level Agreement (SLA) that led seamless service at high quality of service
to client. One of the challenges in Cloud is providing heterogeneous computing services for the clients.
With the increasing number of clients/tenants in the Cloud, unsatisfied agreement is becoming a critical
factor. In this paper, we present an adaptive resource allocation policy which attempts to improve
accountable in Cloud SLA while aiming for enhancing system performance. Specifically, our allocation
incorporates dynamic matching SLA rules to deal with diverse processing requirements from
tenants.Explicitly, it reduces processing overheadswhile achieving better service agreement. Simulation
experiments proved the efficacy of our allocation policy in order to satisfy the tenants; and helps improve
reliable computing.
Revenue Maximization with Good Quality of Service in Cloud ComputingINFOGAIN PUBLICATION
Cloud computing enables people to use resources and services without implementing them on their systems. Profit and quality of service is the most important factor for service providers and it is mainly determined by the configuration of a cloud service platform under given market demand. Single long term renting scheme is usually adopted to design a cloud platform which leads to resource waste and having more renting charges. The novel double renting scheme which is combination of short term and long term renting is aiming at existing issue. This double renting scheme will effectively and efficiently promises a good quality of service of all request and reduces the resource waste significantly. It also provides services with lower cost compared to short term renting scheme. It uses optimal queuing model to maximize the profit. That means the users can access the services simultaneously. The main objective of proposed system is, to maximize profit of service provider by providing efficient and effective services to user.
Pricing Models for Cloud Computing Services, a SurveyEditor IJCATR
Recently, citizens and companies can access utility computing services by using Cloud Computing. These services such as
infrastructures, platforms and applications could be accessed on-demand whenever it is needed. In Cloud Computing, different types of
resources would be required to provide services, but the demands such as requests rates and user's requirements of these services and
the cost of the required resources are continuously varying. Therefore, Service Level Agreements would be needed to guarantee the
service's prices and the offered Quality of Services which are always dependable and interrelated to guarantee revenues maximization
for cloud providers as well as improve customers' satisfaction level. Cloud consumers are always searching for a cloud provider who
provides good service with the least price, so Cloud provider should use advanced technologies and frameworks to increase QoS, and
decrease cost. This paper provides a survey on cloud pricing models and analyzes the recent and relevant research in this field.
Preferences Based Customized Trust Model for Assessment of Cloud ServicesIJECEIAES
In cloud environment, many functionally similar cloud services are available. But, the ser- vices differ in Quality of Service (QoS) levels, offered by them. There is a diversity in user requirements about the expected qualities of cloud services. Trust is a measure to understand whether a cloud service can adequately meet the user requirements. Consequently, trust assessment plays a significant role in selecting the suitable cloud service. This paper proposes preferences based customized trust model (PBCTM) for trust assessment of cloud services. PBCTM takes into account user requirements about the expected quality of services in the form of preferences. Accordingly, it performs customized trust assessment based on the evidences of various attributes of cloud service. PBCTM enables elastic trust computation, which is responsive to dynamically changing user preferences with time. The model facilitates dynamic trust based periodic selection of cloud services according to varying user preferences. Experimental results demonstrate that the proposed preferences based customized trust model outperforms the other model in respect of accuracy and degree of satisfaction.
SERVICE ORIENTED QUALITY REQUIREMENT FRAMEWORK FOR CLOUD COMPUTINGijcsit
This research paper introduces a framework to identify the quality requirements of cloud computing services. It considered two dominant sub-layers; functional layer and runtime layer against cloud characteristics. SERVQUAL model attributes and the opinions of the industry experts were used to derive the quality constructs in cloud computing environment. The framework gives proper identification of cloud computing service quality expectations of users. The validity of the framework was evaluated by using
questionnaire based survey. Partial least squares-structural equation modelling (PLS-SEM) technique was
used to evaluate the outcome. The research findings shows that the significance of functional layer is
higher than runtime layer and prioritized quality factors of two layers are Service time, Information and
data security, Recoverability, Service Transparency, and Accessibility.
360º Degree Requirement Elicitation Framework for Cloud Service ProvidersIJERA Editor
Thisstudy addresses the factors responsible for cloud computing adoption in implementing cloud computing for any organization. Service Level Agreements play a major role for cloud consumer as well as for cloud provider. SLA depends on the requirements gathered by the cloud providers and they vary with the type of organizations for which process is being performed such as education, retail, IT industry etc. SLAs for cloud computing involves technical as well as business requirements which makes the gathering of requirements from stakeholders point of view the heterogeneous process. This research work proposes a 360 degree requirement gathering framework, which reduces the complexitiesduring the process of requirement gathering by cloud service providersas well as SLAs more reliant.
Study on Use Case Model for Service Oriented Architecture Developmentijbuiiir1
The recent trends in the computer industry are the one and only thing i.e., web services. Because of the common availability and open technologies web services are relevant to all. Service-oriented architecture (SOA) helps organizations to transform their business processes for high performance by simplifying the underlying information systems. The most challenging aspect of building successful software applications is clearly understanding and specifying the requirements that an application must satisfy. Use case modeling is an increasingly popular approach for identifying and defining requirements for software applications of all types. Use cases describe the behavior of the system as its users interact with it. This approach helps to place the software requirements in the framework of a user doing some useful work with the system. This type of approach helps to map software requirements to the relevant enduser business processes, a very powerful concept. This paper presents how the relationship between use case model and Service oriented architecture
Basic Concept of Cloud Computing Deployment and Service Model and SOA are explained in the presentation as per the syllabus of RGPV, BU and MCU for the students of BCA, MCA and B. Tech.
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
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Service level agreement in cloud computing an overview
1. Dr Neelesh Jain
Professor
Sagar Institute of Research
Technology & Science
Follow me: Youtube/FB : DrNeeleshjain
Service Level Agreement in Cloud
Computing: An Overview
2. Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Introduction:
Cloud computing is an internet based computing, providing the on demand self
services over the internet for the use of servers, storage space or disk, different
platforms and applications to any cloud user. The cloud computing services are `Pay
as per your usage' based on the agreement between the Cloud Service Provider and
Cloud customer. Service Level Agreement (SLA) is a contract between service
provider and the third party such as Cloud user or Broker(agent), where service
conditions are formally or legally defined. Oftenly Service Level Agreement(SLA) is
used to define the terms of the delivery period of the service, and the different
performance parameters of service to be provided by the provider.
3. Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Benefits of Cloud Computing
Cloud Computing has numerous advantages. Some of them are listed below -
● One can access applications as utilities, over the Internet.
● One can manipulate and configure the applications online at any time.
● It does not require to install a software to access or manipulate cloud application.
● Cloud Computing offers online development and deployment tools, programming
runtime environment through PaaS model.
● Cloud resources are available over the network in a manner that provide platform
independent access to any type of clients.
● Cloud Computing offers on-demand self-service. The resources can be used
without interaction with cloud service provider.
● Cloud Computing is highly cost effective because it operates at high efficiency with
optimum utilization. It just requires an Internet connection
● Cloud Computing offers load balancing that makes it more reliable.
4. Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Necessity of Cloud Computing.
● The Availability Of Resources.
● The Flexibility Of Providing The IT Services In Cloud Computing.
● The Ability Of Refreshing An Aging Infrastructure With Less Price.
● Economically Supporting For New IT Services And Many User.
● Freeing The Staff Members And To Be Engaged In Other Projects.
5. Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Importance of SLA
● The consumer can get the information about the service providers.
● SLA describes the complete information about the service and the type of services (SaaS,
PaaS, IaaS) that are provided to a particular consumer.
● SLA describes the purpose and objectives based on business level policies, which includes
the part of the service provider and the customer.
● The consumers will be able to identify the key security and management strategies of
agreement.
● SLA is used to monitor the quality of service, performance, response time from the service
point of view.
● The consumer can get the idea about the requirements for the management of the service
in case of poor performance.
6. Dr. Neelesh Jain 8770193851 Follow me: Youtube/FB : DrNeeleshjain
Service level agreements in Cloud computing
A Service Level Agreement (SLA) is the bond for performance negotiated between
the cloud services provider and the client. Earlier, in cloud computing all Service Level
Agreements were negotiated between a client and the service consumer. Nowadays,
with the initiation of large utility-like cloud computing providers, most Service Level
Agreements are standardized until a client becomes a large consumer of cloud
services. Service level agreements are also defined at different levels which are
mentioned below:
● Customer-based SLA
● Service-based SLA
● Multi level SLA
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TYPES OF SLA
Service-level agreement provides a framework within which both seller and buyer
of a service can pursue a profitable service business relationship. It outlines the
broad understanding between the service provider and the serviceconsumer for
conducting business and forms the basis for maintaining a mutually beneficial
relationship. From a legal perspective, the necessary terms and conditions that
bind the service provider to provide services continually to the service consumer
are formally defined in SLA.
There are two types of SLAs from the perspective of application hosting.
1. Infrastructure SLA
2. Application SLA
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KEY COMPONENT OF SERVICE-LEVEL AGREEMENT
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TYPES OF SLA
There are two types of SLAs from the perspective of application
hosting.
1. Infrastructure SLA
2. Application SLA
Infrastructure SLA.
The infrastructure provider manages and offers guarantees on
availability of the infrastructure, namely, server machine,
power,network connectivity, and so on. Enterprises manage
themselves, their applications that are deployed on these server
machines. The machines are leased to the customers and are isolated
from machines of other customers.
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TYPES OF SLA
Infrastructure SLA: Key Contractual Elements of an Infrastructural SLA
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TYPES OF SLA
Application SLA.
In the application co-location hosting model, the server
capacity is available to the applications based saolely on their
resource demands.Hence, the service providers are flexible in
allocating and de-allocating computing resources among the
co-located applications. Therefore, the service providers are
also responsible for ensuring to meet their customer’s
application SLOs. For example, an enterprise can have the
following application SLA with a service provider for one of its
application, as shown in Table
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TYPES OF SLA
Application SLA: Key Contractual Elements of an Infrastructural SLA
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LIFE CYCLE OF SLA
Each SLA goes through a sequence of steps starting from
identification of terms and conditions, activation and monitoring of
the stated terms and conditions, and eventual termination of
contract once the hosting relationship ceases to exist. Such a
sequence of steps is called SLA life cycle and consists of the
following five phases:
1. Contract definition
2. Publishing and discovery
3. Negotiation
4. Operationalization
5. De-commissioning
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Literature Review
LinIin et al [l] mentioned the four main goals with respect to SLA -
Oriented Utility Computing i.e. The Customer driven management
of service support, identifying computational risk, suitable
strategies for managing the resources and computation
management of risk.
Yun et al[3] discussed the profit oriented issues and weak point in
traditional technologies.
Slavatore et al[5] presented that applications should act in support
of their users and should be able to make the available cloud
services in SLA negotiation and management.
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Literature Review
Rajkumar et al[7] discussed the hierarchical scheduling, and
the need of job prioritization.
Sherif et al[8] presented that in the fast growing and unpredictable
environments, the approaches are based on capacity planning and
workload forecasting techniques, that are in challenging conditions.
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Issues and Challenges
1. Computation management of risk to maintain the allocation of
resources based on SLA [1].
2. Applications should act in care of their customers and should
be capable to make the accessible cloud services in SLA
negotiation [5].
3. User waiting in the queue for a long period to avail service [7].
4. Performance of the service affected because of peak level of
workload. The customers will not be satisfied because of poor
performance and the income will be affected [8].
5. Service cost related problems [8].
6. Not providing the specified amount of resources [21]
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Conclusion and Future Enhancement
SLA is a legal, formal and negotiated document that defines the
service in terms of quantitative and qualitative metrics. The metrics
which is involved in SLA should be proficient of being measured on a
consistent basis, and the SLA should be evaluated by that metrics.
SLA plays a role in the life cycle of the service. SLA cannot
guarantee that the consumer can access the service as described in
the SLA document. In future our work is focused on developing a
approach to certify that the service is provided according the
specified level of quality which is mentioned in the SLA.