4 research outputs found
Conceptual Service Level Agreement Mechanism to Minimize the SLA Violation with SLA Negotiation Process in Cloud Computing Environment
تُستخدم الخدمة عبر الإنترنت لتكون بمثابة الدفع لكل استخدام في الحوسبة السحابية. لا يحتاج مستخدم الخدمة إلى عقد طويل مع مزودي الخدمات السحابية. اتفاقية مستوى الخدمة (SLAs) هي تفاهمات تم تحديدها بين مزودي الخدمة السحابية وغيرهم ، على سبيل المثال ، مستخدم الخدمة أو المشغل الوسيط أو المشغلين المراقبين. نظرًا لأن الحوسبة السحابية هي تقنية مستمرة تقدم العديد من الخدمات لتطبيقات الأعمال الأساسية وأنظمة قابلة للتكيف لإدارة الاتفاقيات عبر الإنترنت تعتبر مهمة تحافظ على اتفاقية مستوى الخدمةو جودة الخدمة لمستخدم السحابة. إذا فشل مزود الخدمة في الحفاظ على الخدمة المطلوبة ، فإن اتفاقية مستوى الخدمة تعتبر انتهاكًا لاتفاقية مستوى الخدمة. الهدف الرئيسي هو تقليل انتهاكات اتفاقية مستوى الخدمة (SLA) للحفاظ على جودة الخدمة لمستخدمي السحابة. في هذه المقالة البحثية ، اقترحنا صندوق أدوات للمساعدة في إجراء تبادل اتفاقية مستوى الخدمة مع مزودي الخدمة والذي سيمكن العميل السحابي من الإشارة إلى متطلبات جودة الخدمة واقترح خوارزمية بالإضافة إلى نموذج التفاوض من اجل التفاوض على الطلب مع الخدمة لمقدمي الخدمة لإنتاج اتفاقية أفضل بين مقدم الخدمة ومستهلك الخدمة السحابية. وبالتالي ، يمكن للإطار الذي تمت مناقشته تقليل انتهاكات اتفاقية مستوى الخدمة وكذلك خيبات الأمل في المفاوضات وتوسيع نطاق كفاية التكلفة. علاوة على ذلك ، فإن مجموعة أدوات اتفاقية مستوى الخدمة المقترحة منتجة بشكل إضافي للعملاء حتى يتمكن العملاء من تأمين سداد قيمة معقولة مقابل تقليل جودة الخدمة أو وقت التنازل. يوضح هذا البحث أنه يمكن الحفاظ على مستوى الضمان في موفري الخدمات السحابية من خلال نقل الخدمات دون انقطاع من منظور العميل.Online service is used to be as Pay-Per-Use in Cloud computing. Service user need not be in a long time contract with cloud service providers. Service level agreements (SLAs) are understandings marked between a cloud service providers and others, for example, a service user, intermediary operator, or observing operators. Since cloud computing is an ongoing technology giving numerous services to basic business applications and adaptable systems to manage online agreements are significant. SLA maintains the quality-of-service to the cloud user. If service provider fails to maintain the required service SLA is considered to be SLA violated. The main aim is to minimize the SLA violations for maintain the QoS of their cloud users. In this research article, a toolbox is proposed to help the procedure of exchanging of a SLA with the service providers that will enable the cloud client in indicating service quality demands and an algorithm as well as Negotiation model is also proposed to negotiate the request with the service providers to produce a better agreement between service provider and cloud service consumer. Subsequently, the discussed framework can reduce SLA violations as well as negotiation disappointments and have expanded cost-adequacy. Moreover, the suggested SLA toolkit is additionally productive to clients so clients can secure a sensible value repayment for diminished QoS or conceding time. This research shows the assurance level in the cloud service providers can be kept up by as yet conveying the services with no interruption from the client's perspectiv
Service level agreement specification for IoT application workflow activity deployment, configuration and monitoring
PhD ThesisCurrently, we see the use of the Internet of Things (IoT) within various domains
such as healthcare, smart homes, smart cars, smart-x applications, and smart
cities. The number of applications based on IoT and cloud computing is projected
to increase rapidly over the next few years. IoT-based services must meet
the guaranteed levels of quality of service (QoS) to match users’ expectations.
Ensuring QoS through specifying the QoS constraints using service level agreements
(SLAs) is crucial. Also because of the potentially highly complex nature
of multi-layered IoT applications, lifecycle management (deployment, dynamic
reconfiguration, and monitoring) needs to be automated. To achieve this it is
essential to be able to specify SLAs in a machine-readable format.
currently available SLA specification languages are unable to accommodate
the unique characteristics (interdependency of its multi-layers) of the IoT domain.
Therefore, in this research, we propose a grammar for a syntactical structure
of an SLA specification for IoT. The grammar is based on a proposed conceptual
model that considers the main concepts that can be used to express the requirements
for most common hardware and software components of an IoT application
on an end-to-end basis. We follow the Goal Question Metric (GQM) approach to
evaluate the generality and expressiveness of the proposed grammar by reviewing
its concepts and their predefined lists of vocabularies against two use-cases
with a number of participants whose research interests are mainly related to IoT.
The results of the analysis show that the proposed grammar achieved 91.70% of
its generality goal and 93.43% of its expressiveness goal.
To enhance the process of specifying SLA terms, We then developed a toolkit
for creating SLA specifications for IoT applications. The toolkit is used to simplify
the process of capturing the requirements of IoT applications. We demonstrate
the effectiveness of the toolkit using a remote health monitoring service (RHMS)
use-case as well as applying a user experience measure to evaluate the tool by
applying a questionnaire-oriented approach. We discussed the applicability of our
tool by including it as a core component of two different applications: 1) a contextaware
recommender system for IoT configuration across layers; and 2) a tool for
automatically translating an SLA from JSON to a smart contract, deploying it
on different peer nodes that represent the contractual parties. The smart contract
is able to monitor the created SLA using Blockchain technology. These two
applications are utilized within our proposed SLA management framework for IoT.
Furthermore, we propose a greedy heuristic algorithm to decentralize workflow
activities of an IoT application across Edge and Cloud resources to enhance
response time, cost, energy consumption and network usage. We evaluated the
efficiency of our proposed approach using iFogSim simulator. The performance
analysis shows that the proposed algorithm minimized cost, execution time, networking,
and Cloud energy consumption compared to Cloud-only and edge-ward
placement approaches