• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.440-443
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• 2011

클라우드 컴퓨팅(Cloud Computing)이 주목받고 활성화되면서 핵심 기술인 서버 가상화(Server Virutualization)를 이용한 시스템 구성이 인기를 얻고 있다. 이러한 영향으로 운영 중인 시스템에 대한 분석 및 서버 가상화 기술을 이용한 자원의 활용이 크게 각광받고 있다. 본 논문에서는 리눅스 시스템을 기반으로 시스템에 발생되는 부하 확인 방법과 종류, CPU의 자원과 부하와의 관계 분석을 통하여 시스템 유휴자원 활용과 클라우드 컴퓨팅 인프라 구축을 위한 기반 기술을 제공하고자 한다.

• 한국건설관리학회논문집
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• 제17권5호
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• pp.78-88
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• 2016

최근 국내에서는 BIM 적용을 의무화하는 프로젝트의 증가로 인하여 BIM 기술의 도입이 확대되고 있지만, 중소설계사무소에서는 관련 제도 미비, 인프라 구축비용, 상이한 프로세스 등과 같은 다양한 문제로 인해 BIM 확산이 저조한 실정이다. 본 연구에서는 이러한 문제 중에서 BIM 운영관리를 위해 필요한 인프라 구축 및 유지비용 절감 방안으로 타 산업에서 최근 적용이 모색되고 있는 클라우드 컴퓨팅 기술 중 하나인 VDI 시스템을 BIM 분야에 적용하기 위한 연구를 수행하였다. 연구 수행절차로는 중소설계사무소의 BIM 기반 환경에서 문제점을 분석하고 타 산업에서 VDI의 활용 요소가 BIM 환경의 저해요인을 해소 할 수 있는지 분석한 후, 건설 산업에 적합한 VDI 시스템 적용 방안을 모색하여 Server 규모산정 프로세스를 구축하였다. 이를 바탕으로 BIM 인프라 환경에 적용하여 자원관리의 효율성을 분석하여 BIM 환경에서 성공적인 VDI 도입에 일조 하고자 한다.

• 서비스연구
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• 제10권4호
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• pp.57-70
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• 2020

전 세계적으로 클라우드 서비스는 다양한 산업과의 융합을 통하여 산업의 생산성을 향상시키고 혁신을 가속화하는 핵심 인프라로써 지속적인 시장규모의 확대와 전 산업으로의 확산이 전망되고 있다. 특히 COVID-19로 인한 글로벌 팬데믹 현상으로 인해 클라우드 서비스는 언택트 시대를 대응하기 위한 핵심 인프라로 인식하는 계기가 되었다. 그러나 아직 국내에서는 시장 확대를 위한 전 단계에 머물러 있는 것이 현실이다. 본 논문은 확장된 TAM을 통하여 각 산업별로 클라우드 서비스가 어떠한 경로로 사용자에게 수용될 수 있으며 어떠한 요인들이 클라우드 서비스를 사용자에게 수용과 회피의 영향을 미치는지를 실증 분석하고자 한다. 이를 위하여 클라우드 서비스 이용의도를 분석하기 위한 산업분야를 선정하고, 제안한 확장된 기술수용모델을 통하여 가설검정을 통해 각 산업별 클라우드 서비스 수용의도에 미치는 영향과 요인을 분석하였다. 산업분야는 교육, 금융, 제조, 의료의 4개의 산업분야를 선정하였고 TAM의 매개변수와 클라우드의 핵심특징과 기타 요인을 종합적으로 검토하여 요인을 도출하였다. 실증 분석을 수행한 결과 4개 산업분야별로 클라우드 서비스 수용의도에 영향을 미치는 요인들에 차이점이 나타났는데, 이는 산업별로 클라우드 서비스의 도입이나 이용에 대한 인식의 차이가 있음을 의미한다. 궁극적으로 본 연구를 통하여 산업별로 클라우드 서비스 이용의도를 파악하는데 도움을 줄 수 있을 뿐만 아니라 클라우드 서비스 제공자들이 각 산업에 클라우드 서비스를 확대하여 제공하는데 도움을 줄 수 있을 것으로 기대한다.

• Journal of Korea Trade
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• 제26권6호
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• pp.20-40
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• 2022

Purpose - In recent times, the international trade environment has been changing rapidly, centering on the online market. In the post-COVID-19 era, small and medium-sized trading companies are facing the problem of not being properly provided with overseas market research, market trend analysis, and trade-related information. Cloud-based digital trade is being sought as an alternative to solve these problems; however, there is a lack of research on the intention to switch to digital trade among small and medium-sized trading companies. Therefore, this study empirically analyzes the intention to switch to digital trade based on the migration theory, and through this, attempts to identify each factor that affects the intention to switch to digital trade. Design/methodology - In this study, in order to identify factors influencing intention to switch to digital trade and innovation resistance of small and medium-sized trading companies, through previous research on migration theory and the PPM (Push, Pull, Mooring) model, each variable was selected for the purpose of the study. Based on this, a research model was established for the factors affecting switching to digital trade of small and medium-sized trading companies and empirically analyzed. In addition, considering the differences in the innovation propensity and maturity of information infrastructure of trading companies as the recipients of innovation, this study analyzes the moderating effect of the mooring effect and seeks ways to establish specific strategies according to the degree. Findings - As a result of empirical analysis, the pull effect was found to have the greatest influence on intention to switch to digital trade. However, the pull factor was found to have an effect on user resistance, and it was confirmed that it was a factor simultaneously inducing positive and negative consumption behaviors among users. In addition, it was found that the higher the company's innovation propensity, the higher the pull effect's influence on the intention to switch, and analysis showed that the push effect had no influence. In addition, companies with high information infrastructure maturity were expected to have a relatively high level of intention to switch compared to companies with low information infrastructure maturity, and the difference between the two groups was found not to be statistically significant. Originality/value - This study is a timely study in that it demonstrated the effect on the switching to cloud-based digital trade for small and medium-sized trading companies and that the cloud system related to digital trade is in full swing. There are academic implications in that it revealed that the pull effect is an important factor in the intention to switch to cloud service. Practical implications were presented in that small and medium-sized trading companies suggested ways to increase the value of the cloud system for switching to digital trade and a way to increase the switching ratio by minimizing the mooring effect. In addition, the study argues that active institutional support from the government is needed to activate cloud service.

• Journal of the Korean Data and Information Science Society
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• 제23권6호
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• pp.1259-1269
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• 2012

Cloud computing has rapidly become a new infrastructure for organizations to reduce their capital cost in IT investment and to develop planetary-scale distributed applications. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting inter-cloud data management and dissemination. In this paper, we propose a geographic group quorum system (GGQS)-based hybrid algorithm for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event notification and so forth. The proposed algorithm first organizes these distributed clouds into a geographic group quorum overlay to support a constant event dissemination latency. Then it uses a hybrid protocol that combines geographic group-based broad-cast with quorum-based multicast. Our numerical results show that the GGQS-based hybrid algorithm improves the efficiency as compared with Chord-based, Plume an GQS-based algorithms.

• International Journal of Computer Science & Network Security
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• 제23권7호
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• pp.119-130
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• 2023

Worldwide organizations use the benefits offered by Cloud Computing (CC) to store data, software and programs. While running hugely complicated and sophisticated software on cloud requires more energy that causes global warming and affects environment. Most of the time energy consumption is wasted and it is required to explore opportunities to reduce emission of carbon in CC environment to save energy. Many improvements can be done in regard to energy efficiency from the software perspective by considering and paying attention on the energy consumption aspects of software's that run on cloud infrastructure. The aim of the current research is to propose a framework with an additional phase called parameterized development phase to be incorporated along with the traditional Software Development Life cycle (SDLC) where the developers need to consider the suggested techniques during software implementation to utilize low energy for running software on the cloud and contribute in green computing. Experiments have been carried out and the results prove that the suggested techniques and methods has enabled in achieving energy consumption.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권3호
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• pp.843-871
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• 2015

Cloud computing evolve as a cost effective business model for IT companies to focus on their core business without perturbing on infrastructure related issues. Hence, major IT firms and Small & Medium Enterprises (SME) are adopting cloud services on rental basis from cloud providers. Cloud Service level agreements (SLA) act as a key liaison between consumers and providers on renting Anything as a Service (AaaS). Design of such an agreement must aim for greater profit to providers as well as assured availability of services to consumers. However in reality, cloud SLA is not satisfying the parties involved because of its inherent complex nature and issues. Also currently most of the agreements are unilateral to favour the provider. This study focuses on comprehensive, 360-degree survey on different aspects of the cloud service agreements. We detailed the life cycle of SLA based on negotiation, different types of SLA, current standards, languages & characteristics, metrics and issues involved in it. This study will help the cloud actors to understand and evaluate the agreements and to make firm decision on negotiation. The need for standardized, bilateral, semantic SLA has also been proposed.

• Journal of Information Processing Systems
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• 제6권4호
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• pp.553-562
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• 2010

The core services in cloud computing environment are SaaS (Software as a Service), Paas (Platform as a Service) and IaaS (Infrastructure as a Service). Among these three core services server virtualization belongs to IaaS and is a service technology to reduce the server maintenance expenses. Normally, the primary purpose of sever virtualization is building and maintaining a new well functioning server rather than using several existing servers, and in improving the various system performances. Often times this presents an issue in that there might be a need to increase expenses in order to build a new server. This study intends to use grid service architecture for a form of server virtualization which utilizes the existing servers rather than introducing a new server. More specifically, the proposed system is to enhance system performance and to reduce the corresponding expenses, by adopting a scheduling algorithm among the distributed servers and the constituents for grid computing thereby supporting the server virtualization service. Furthermore, the proposed server virtualization system will minimize power management by adopting the sleep severs, the subsidized servers and the grid infrastructure. The power maintenance expenses for the sleep servers will be lowered by utilizing the ACPI (Advanced Configuration & Power Interface) standards with the purpose of overcoming the limits of server performance.

• 정보과학회지
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• 제31권4호
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• pp.70-75
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• 2013

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.263-266
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• 2013

클라우드 컴퓨팅 환경의 보편화, 모바일 기기의 증가, 다양한 웹 기반 서비스의 등장으로 대용량의 저장 공간이 요구되고 있다. 특히, 구글 드라이브, 네이버 ndrive, 다음 클라우드 등 웹 기반의 저장형 서비스의 이용이 보편화되면서 많은 저장 공간이 요구되고 있다. 따라서, 스토리지 분야도 네트워크를 통하여 가상화된 스토리지 자원을 사용자의 요구에 따라 제공이 가능하고, 대규모 확장이 쉽고, 특정 지리적 위치에 구애받지 않는 클라우드 스토리지 기술이 각광받도 있다. 본 논문에서는 클라우드 스토리지 인프라 구축을 위하여 공개 소프트웨어 기술인 하둡, 스위프트, GlusterFS의 특징에 대해 알아본다.