| 1. |
- Albshri, Adel, et al.
(författare)
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A conceptual architecture for simulating blockchain-based IoT ecosystems
- 2023
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Ingår i: Journal of Cloud Computing. - : Springer Nature. - 2192-113X. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- Recently, the convergence between Blockchain and IoT has been appealing in many domains including, but not limited to, healthcare, supply chain, agriculture, and telecommunication. Both Blockchain and IoT are sophisticated technologies whose feasibility and performance in large-scale environments are difficult to evaluate. Consequently, a trustworthy Blockchain-based IoT simulator presents an alternative to costly and complicated actual implementation. Our primary analysis finds that there has not been so far a satisfactory simulator for the creation and assessment of blockchain-based IoT applications, which is the principal impetus for our effort. Therefore, this study gathers the thoughts of experts about the development of a simulation environment for blockchain-based IoT applications. To do this, we conducted two different investigations. First, a questionnaire is created to determine whether the development of such a simulator would be of substantial use. Second, interviews are conducted to obtain participants’ opinions on the most pressing challenges they encounter with blockchain-based IoT applications. The outcome is a conceptual architecture for simulating blockchain-based IoT applications that we evaluate using two research methods; a questionnaire and a focus group with experts. All in all, we find that the proposed architecture is generally well-received due to its comprehensive range of key features and capabilities for blockchain-based IoT purposes.
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| 2. |
- Alhamazani, Khalid, et al.
(författare)
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An overview of the commercial cloud monitoring tools: research dimensions, design issues, and state-of-the-art
- 2015
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Ingår i: Computing. - : Springer Science and Business Media LLC. - 0010-485X .- 1436-5057. ; 97:4, s. 357-377
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Tidskriftsartikel (refereegranskat)abstract
- Cloud monitoring activity involves dynamically tracking the Quality of Service (QoS) parameters related to virtualized resources (e.g., VM, storage, network, appliances, etc.), the physical resources they share, the applications running on them and data hosted on them. Applications and resources configuration in cloud computing environment is quite challenging considering a large number of heterogeneous cloud resources. Further, considering the fact that at given point of time, there may be need to change cloud resource configuration (number of VMs, types of VMs, number of appliance instances, etc.) for meet application QoS requirements under uncertainties (resource failure, resource overload, workload spike, etc.). Hence, cloud monitoring tools can assist a cloud providers or application developers in: (i) keeping their resources and applications operating at peak efficiency, (ii) detecting variations in resource and application performance, (iii) accounting the service level agreement violations of certain QoS parameters, and (iv) tracking the leave and join operations of cloud resources due to failures and other dynamic configuration changes. In this paper, we identify and discuss the major research dimensions and design issues related to engineering cloud monitoring tools. We further discuss how the aforementioned research dimensions and design issues are handled by current academic research as well as by commercial monitoring tools.
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| 3. |
- Alhamazani, Khalid, et al.
(författare)
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CLAMS : Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework
- 2014
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Ingår i: Proceedings of the 11th IEEE International Conference on Services Computing (IEEE SCC 2014). - Piscataway, NJ : IEEE Communications Society. - 9781479950652 - 9781479950669 ; , s. 283-290
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Konferensbidrag (refereegranskat)abstract
- Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers, data processing frameworks, etc.) platforms. Application services hosted on single/multiple cloud provider platforms have diverse characteristics that require extensive monitoring mechanisms to aid in controlling run-time quality of service (e.g., access latency and number of requests being served per second, etc.). To provide essential real-time information for effective and efficient cloud application quality of service (QoS) monitoring, in this paper we propose, develop and validate CLAMS—Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework is capable of: (a) performing QoS monitoring of application components (e.g., database, web server, application server, etc.) that may be deployed across multiple cloud platforms (e.g., Amazon and Azure); and (b) giving visibility into the QoS of individual application component, which is something not supported by current monitoring services and techniques. We conduct experiments on real-world multi-cloud platforms such as Amazon and Azure to empirically evaluate our framework and the results validate that CLAMS efficiently monitors applications running across multiple clouds.
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| 4. |
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| 5. |
- Alhamazani, Khalid, et al.
(författare)
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Cross-Layer Multi-Cloud Real-Time Application QoS Monitoring and Benchmarking As-a-Service Framework
- 2019
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Ingår i: I E E E Transactions on Cloud Computing. - Los Alamitos : IEEE. - 2168-7161. ; 7:1, s. 48-61
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Tidskriftsartikel (refereegranskat)abstract
- Cloud computing provides on-demand access to affordable hardware (e.g., multi-core CPUs, GPUs, disks, and networking equipment) and software (e.g., databases, application servers and data processing frameworks) platforms with features such as elasticity, pay-per-use, low upfront investment and low time to market. This has led to the proliferation of business critical applications that leverage various cloud platforms. Such applications hosted on single/multiple cloud provider platforms have diverse characteristics requiring extensive monitoring and benchmarking mechanisms to ensure run-time Quality of Service (QoS) (e.g., latency and throughput). This paper proposes, develops and validates CLAMBS—Cross-Layer Multi Cloud Application Monitoring and Benchmarking as-a-Service for efficient QoS monitoring and benchmarking of cloud applications hosted on multi-clouds environments. The major highlight of CLAMBS is its capability of monitoring and benchmarking individual application components such as databases and web servers, distributed across cloud layers (*-aaS), spread among multiple cloud providers. We validate CLAMBS using prototype implementation and extensive experimentation and show that CLAMBS efficiently monitors and benchmarks application components on multi-cloud platforms including Amazon EC2 and Microsoft Azure.
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| 6. |
- Alhamazani, Khalid, et al.
(författare)
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Real-time QoS Monitoring for Cloud-based Big Data Analytics Application in Mobile Environments
- 2014
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Ingår i: 2014 15th IEEE International Conference on Mobile Data Management (MDM 2014). - Piscataway, NY : IEEE Communications Society. - 9781479957057 ; , s. 337-340
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Konferensbidrag (refereegranskat)abstract
- The service delivery model of cloud computing acts as a key enabler for big data analytics applications enhancing productivity, efficiency and reducing costs. The ever increasing flood of data generated from smart phones and sensors such as RFID readers, traffic cams etc require innovative provisioning and QoS monitoring approaches to continuously support big data analytics. To provide essential information for effective and efficient bid data analytics application QoS monitoring, in this paper we propose and develop CLAMS-Cross-Layer Multi-Cloud Application Monitoring-as-a-Service Framework. The proposed framework: (a) performs multi-cloud monitoring, and (b) addresses the issue of cross-layer monitoring of applications. We implement and demonstrate CLAMS functions on real-world multi-cloud platforms such as Amazon and Azure.
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| 7. |
- Alqahtani, Awatif, et al.
(författare)
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The Integration of Scheduling, Monitoring, and SLA in Cyber Physical Systems
- 2020
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Ingår i: Handbook of Integration of Cloud Computing, Cyber Physical Systems and Internet of Things. - Switzerland : Springer. ; , s. 237-254
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Bokkapitel (refereegranskat)abstract
- Cyber-Physical Systems (CPS) is a very complex system where a new management layer must be developed. This chapter presents the benefits and challenges of deploying real-time Scheduling, Monitoring, and End-to-End SLA (SMeSLA) in CPS. We propose an SMeSLA conceptual architecture which allows end-users to submit their service level requirements to an SLA manager; as a result, scheduling and monitoring managers would operate accordingly. The SMeSLA management layer empowers CPS system to meet consumers’ satisfaction and achieve optimal performance. However, in order to successfully deploy SMeSLA in CPS, many technical and general challenges must be addressed.
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| 8. |
- Alzubaidi, Ali, et al.
(författare)
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A Blockchain-based Approach for Assessing Compliance with SLA-guaranteed IoT Services
- 2020
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Ingår i: Proceedings. - : IEEE. ; , s. 213-230
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Konferensbidrag (refereegranskat)abstract
- Within cloud-based internet of things (IoT) applications, typically cloud providers employ Service Level Agreements (SLAs) to ensure the quality of their provisioned services. Similar to any other contractual method, an SLA is not immune to breaches. Ideally, an SLA stipulates consequences (e.g. penalties) imposed on cloud providers when they fail to conform to SLA terms. The current practice assumes trust in service providers to acknowledge SLA breach incidents and executing associated consequences. Recently, the Blockchain paradigm has introduced compelling capabilities that may enable us to address SLA enforcement more elegantly. This paper proposes and implements a blockchain-based approach for assessing SLA compliance and enforcing consequences. It employs a diagnostic accuracy method for validating the dependability of the proposed solution. The paper also benchmarks Hyperledger Fabric to investigate its feasibility as an underlying blockchain infrastructure concerning latency and transaction success/fail rates.
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| 9. |
- Alzubaidi, Ali, et al.
(författare)
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A blockchain-based SLA monitoring and compliance assessment for IoT ecosystems
- 2023
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Ingår i: Journal of Cloud Computing. - : Springer Nature. - 2192-113X. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- A Service Level Agreement (SLA) establishes the trustworthiness of service providers and consumers in several domains; including the Internet of Things (IoT). Given the proliferation of Blockchain technology, we find it compelling to reconsider the assumption of trust and centralised governance typically practised in SLA management including monitoring, compliance assessment, and penalty enforcement. Therefore, we argue that, such critical tasks should be operated by blockchain-based smart contracts in a non-repudiable manner beyond the influence of any SLA party. This paper envisions an IoT scenario wherein a firefighting station outsources end-to-end IoT operations to a specialised service provider. The contractual relationship between them is governed by an SLA which stipulates a set of quality requirements and violation consequences. The main contribution of this paper lies in designing, deploying and empirically experimenting a novel blockchain-based SLA monitoring and compliance assessment framework in the context of IoT. This is done by utilising Hyperledger Fabric (HLF), an enterprise-grade blockchain technology. Our work highlights a set of considerations and best practice at two sides, the IoT application monitoring-side and the blockchain-side. Moreover, it experimentally validates the reliability of the proposed monitoring approach, which collects relevant metrics from each IoT component and examines them against the quality requirements stated in the SLA. Finally, we propose a novel design for smart contracts at the blockchain-side, analyse and benchmark the performance, and demonstrate that the new design proves to successfully handle Multiversion Concurrency Control (MVCC) conflicts typically encountered in blockchain applications, while maintaining sound throughput and latency.
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| 10. |
- Alzubaidi, Ali, et al.
(författare)
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Blockchain-Based SLA Management in the Context of IoT
- 2019
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Ingår i: IT Professional Magazine. - : IEEE. - 1520-9202 .- 1941-045X. ; 21:4, s. 33-40
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Tidskriftsartikel (refereegranskat)abstract
- In pursuit of effective service level agreement (SLA) monitoring and enforcement in the context of Internet of Things (IoT) applications, this article regards SLA management as a distrusted process that should not be handled by a single authority. Here, we aim to justify our view on the matter and propose a conceptual blockchain-based framework to cope with some limitations associated with traditional SLA management approaches.
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