• Title/Summary/Keyword: Server virtualization

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Service Delivery Time Improvement using HDFS in Desktop Virtualization (데스크탑 가상화에서 HDFS를 이용한 서비스 제공시간 개선 연구)

  • Lee, Wan-Hee;Lee, Bong-Hwan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.16 no.5
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    • pp.913-921
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    • 2012
  • The current PC-based desktop environment is being converted into server-based virtual desktop environment due to security, mobility, and low upgrade cost. In this paper, a desktop virtualization system is implemented using an open source-based cloud computing platform and hypervisor. The implemented system is applied to the virtualziation of computer in university. In order to reduce the image transfer time, we propose a solution using HDFS. In addition, an image management structure needed for desktop virtualization is designed and implemented, and applied to a real computer lab which accommodates 30 PCs. The performance of the proposed system is evaluated in various aspects including implementation cost, power saving rate, reduction rate of license cost, and management cost. The experimental results showed that the proposed system considerably reduced the image transfer time for desktop service.

A Dynamic Allocation Scheme for Improving Memory Utilization in Xen (Xen에서 메모리 이용률 향상을 위한 동적 할당 기법)

  • Lee, Kwon-Yong;Park, Sung-Yong
    • Journal of KIISE:Computer Systems and Theory
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    • v.37 no.3
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    • pp.147-160
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    • 2010
  • The system virtualization shows interest in the consolidation of servers for the efficient utilization of system resources. There are many various researches to utilize a server machine more efficiently through the system virtualization technique, and improve performance of the virtualization software. These researches have studied with the activity to control the resource allocation of virtual machines dynamically focused on CPU, or to manage resources in the cross-machine using the migration. However, the researches of the memory management have been wholly lacking. In this respect, the use of memory is limited to allocate the memory statically to virtual machine in server consolidation. Unfortunately, the static allocation of the memory causes a great quantity of the idle memory and decreases the memory utilization. The underutilization of the memory makes other side effects such as the load of other system resources or the performance degradation of services in virtual machines. In this paper, we suggest the dynamic allocation of the memory in Xen to control the memory allocation of virtual machines for the utilization without the performance degradation. Using AR model for the prediction of the memory usage and ACO (Ant Colony Optimization) algorithm for optimizing the memory utilization, the system operates more virtual machines without the performance degradation of servers. Accordingly, we have obtained 1.4 times better utilization than the static allocation.

Comparative Analysis of ViSCa Platform-based Mobile Payment Service with other Cases (스마트카드 가상화(ViSCa) 플랫폼 기반 모바일 결제 서비스 제안 및 타 사례와의 비교분석)

  • Lee, June-Yeop;Lee, Kyoung-Jun
    • Journal of Intelligence and Information Systems
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    • v.20 no.2
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    • pp.163-178
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    • 2014
  • Following research proposes "Virtualization of Smart Cards (ViSCa)" which is a security system that aims to provide a multi-device platform for the deployment of services that require a strong security protocol, both for the access & authentication and execution of its applications and focuses on analyzing Virtualization of Smart Cards (ViSCa) platform-based mobile payment service by comparing with other similar cases. At the present day, the appearance of new ICT, the diffusion of new user devices (such as smartphones, tablet PC, and so on) and the growth of internet penetration rate are creating many world-shaking services yet in the most of these applications' private information has to be shared, which means that security breaches and illegal access to that information are real threats that have to be solved. Also mobile payment service is, one of the innovative services, has same issues which are real threats for users because mobile payment service sometimes requires user identification, an authentication procedure and confidential data sharing. Thus, an extra layer of security is needed in their communication and execution protocols. The Virtualization of Smart Cards (ViSCa), concept is a holistic approach and centralized management for a security system that pursues to provide a ubiquitous multi-device platform for the arrangement of mobile payment services that demand a powerful security protocol, both for the access & authentication and execution of its applications. In this sense, Virtualization of Smart Cards (ViSCa) offers full interoperability and full access from any user device without any loss of security. The concept prevents possible attacks by third parties, guaranteeing the confidentiality of personal data, bank accounts or private financial information. The Virtualization of Smart Cards (ViSCa) concept is split in two different phases: the execution of the user authentication protocol on the user device and the cloud architecture that executes the secure application. Thus, the secure service access is guaranteed at anytime, anywhere and through any device supporting previously required security mechanisms. The security level is improved by using virtualization technology in the cloud. This virtualization technology is used terminal virtualization to virtualize smart card hardware and thrive to manage virtualized smart cards as a whole, through mobile cloud technology in Virtualization of Smart Cards (ViSCa) platform-based mobile payment service. This entire process is referred to as Smart Card as a Service (SCaaS). Virtualization of Smart Cards (ViSCa) platform-based mobile payment service virtualizes smart card, which is used as payment mean, and loads it in to the mobile cloud. Authentication takes place through application and helps log on to mobile cloud and chooses one of virtualized smart card as a payment method. To decide the scope of the research, which is comparing Virtualization of Smart Cards (ViSCa) platform-based mobile payment service with other similar cases, we categorized the prior researches' mobile payment service groups into distinct feature and service type. Both groups store credit card's data in the mobile device and settle the payment process at the offline market. By the location where the electronic financial transaction information (data) is stored, the groups can be categorized into two main service types. First is "App Method" which loads the data in the server connected to the application. Second "Mobile Card Method" stores its data in the Integrated Circuit (IC) chip, which holds financial transaction data, which is inbuilt in the mobile device secure element (SE). Through prior researches on accept factors of mobile payment service and its market environment, we came up with six key factors of comparative analysis which are economic, generality, security, convenience(ease of use), applicability and efficiency. Within the chosen group, we compared and analyzed the selected cases and Virtualization of Smart Cards (ViSCa) platform-based mobile payment service.

A Case Study on the Virtualization for Server Consolidation (가상화 기술을 적용한 서버 통합 사례 연구)

  • Koh, Beom Seok
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.04a
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    • pp.115-118
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    • 2010
  • 가상화를 적용한 서버 통합의 기대효과 예측은 기업 내 여러 가지 환경 변수에 의해 예측하기가 쉽지 않다. 본 연구 논문에서는 가상화를 적용한 서버 통합 사례를 소개하고 엔터프라이즈 기업환경에서 가상화 프로젝트를 진행하였던 그 과정을 사례 연구를 통해 정리한다. 여기서 제시되는 결과를 통해 서버 가상화에 대한 여러 문제를 고찰하는 데 도움을 줄 수 있을 것이다.

Cloud System Construction for Availability of University Information System

  • Jang, Hae-Sook;Park, Ki-Hong
    • Journal of the Korea Society of Computer and Information
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    • v.22 no.12
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    • pp.179-186
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    • 2017
  • Managing students' data is a high prioritized duty of the university administration since most of the school affairs are proceed based on that database. Universities have invested in IT assets such as servers, storage, database, and networks. However, continuing investment in IT infrastructure is impossible due to limited budget and rapid changes in the educational environment. As cloud computing diffuse, universities are trying to reduce costs and improve efficiency by increasing server utilization, unlike when physically investing. We designed a hypothetical academic information management system based on cloud computing by utilizing the advanced server virtualization technology. This administrative cloud system allows universities to improve the availability of the system with low cost. The system demonstrates its flexibility of using data resources and immediacy of resumption.

Adaptive Server Selection Algorithm for High Availability based on DSV (DSV 기반 서버 고가용성을 위한 적응적 서버 선정 알고리즘)

  • Kim, Hyun-Woo;Byun, HwiRim;song, Eun-Ha;Jeong, Young-Sik
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.04a
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    • pp.118-120
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    • 2015
  • 현재, 급격한 IT 기술 발전의 산물인 스마트 디바이스에서 발생되는 데이터의 양이 기하급수적으로 증가함에 따라 효율적으로 저장하기 위한 다양한 연구 및 기술 개발이 진행되고 있다. 이 중에 Desktop Storage Virtualization(DSV)은 비가용 데스크톱 스토리지 자원을 하나의 통합된 스토리지로 만들고 이를 스토리지 사용자 니즈에 따라 스토리지를 제공한다. DSV는 분산된 데스크탑의 비가용 자원을 통합함에 따라 신뢰성이 매우 중요시된다. 그러나 DSV 환경에서 산발적 서버다운 및 기타 장애시 대응체계가 미흡하다. 본 논문에서는 이러한 상황을 고려한 Server Selection Algorithm(SSA)를 제시한다. SSA는 서버 장애 발생시 대체 서버를 분산된 데스크탑이 적응적 인지 및 서버를 변경함으로써 고가용성을 제공한다.

Design and Implementation of Scalable Webhard API Based on Storage Virtualization for Groupware Systems (그룹웨어 시스템을 위한 확장성 있는 가상화 스토리지 기반 웹하드 API의 설계 및 구현)

  • Kang, Seonho;Choi, Hwangkyu
    • Journal of Digital Contents Society
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    • v.15 no.3
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    • pp.395-403
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    • 2014
  • Recently webhard services in various applications have been notably increased. In order to adopt some webhard functions into the existing application platform, however, a lot of manpower and cost is necessary. In this paper, we propose webhard API based on cloud storage for building and extending the webhard functions. The proposed system consists of three layers: application, web-hard server, and storage server in which each layer provides its API independently. It is enable the developer to easily extend the webhard functions to the application by using only HTTP request, which provides no limitation of the programming language. Because our webhard API is running on the virtualized cloud storage, it is possible to easily extend the storages and to reduce the maintenance cost. In this paper, we implement all the webhard API and then show the result of adopting the API to a prototype groupware system.

Design of OpenStack Cloud Storage Systems - Applying Infiniband Storage Network and Storage Virtualization Performance Evaluation (인피니밴드 스토리지 네트워크를 적용한 오픈스택 클라우드 스토리지 시스템의 설계 및 스토리지 가상화 성능평가)

  • Heo, Hui-Seong;Lee, Kwang-Soo;Pirahandeh, Mehdi;Kim, Deok-Hwan
    • KIISE Transactions on Computing Practices
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    • v.21 no.7
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    • pp.470-475
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    • 2015
  • Openstack is an open source software that enables developers to build IaaS(Infrastructure as a Service) cloud platforms. Openstack can virtualize servers, networks and storages, and provide them to users. This paper proposes the structure of Openstack cloud storage system applying Infiniband to solve bottlenecking that may occur between server and storage nodes when the server performs an I/O operation. Furthermore, we implement all flash array based high-performance Cinder storage volumes which can be used at Nova virtual machines by applying distributed RAID-60 structures to three 8-bay SSD storages and show that Infiniband storage networks applied to Openstack is suitable for virtualizing high-performance storage.

Efficiency Server Metadata Management Mechanism for Server Fault-tolerance based on DSV (DSV 기반 서버 장애 대응을 위한 효율적인 서버 메타데이터 관리 기법)

  • Kim, Hyun-Woo;Byeon, Hwi-Rim;Song, Eun-Ha;Jeong, Young-Sik
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.04a
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    • pp.112-113
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    • 2015
  • 최근, IT 기술의 발달로 다양한 스마트 디바이스 및 서비스 증가로 빅 데이터 시대가 도래되었다. 이에 빅 데이터를 저장하기 위한 많은 연구들이 진행되고 있지만 데이터 저장을 위한 측면에 중점을 두어 본질적인 서버 운용에 대한 연구가 도외시 되고 없다. 또한, 기존의 서버 운용은 장애 발생시 페일 오버나 리던던시를 통해 대용을 하고 있지만, 이러한 기법은 연속적인 장애 발생에 대한 대응이 불가하다. 본 논문에서는 빅 데이터를 저장하기 위한 DSV(Desktop Storage Virtualization) 환경에서 서버 장애를 효율적으로 대응하는 M2S2(Metadata Management for Server Sustainability)를 제안한다. M2S2는 독립적으로 분산된 데스크당의 성능, 거리, 저장된 데이터양을 기준으로 최적의 대체 서버가 수행된다. 또한, 대체 서버의 장애 발생시 하위 데스크탑 중에 최적의 대체 서버가 수행 반복됨으로써 지속적인 서버 운용이 가능하다.

Fuzzy logic-based Priority Live Migration Model for Efficiency (이주 효율성 향상을 위한 퍼지로직 기반 우선순위 이주 모델)

  • Park, Min-Oh;Kim, Jae-Kwon;Choi, Jeong-seok;Lee, Jong-Sik
    • Journal of the Korea Society for Simulation
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    • v.24 no.4
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    • pp.11-21
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    • 2015
  • If the cloud computing environment is not sufficiently provide the required resources due to the number of virtual server to process the request, may cause a problem that the load applied to the specific server. Migration administrator receive the resources of each physical server for improving the efficiency of the virtual server that exists in the physical servers, and determines the migration destination based on the simulation results. But, there is more overhead predicting the future resource consumption of all the physical server to decide the migration destination through the simulation process in large and complex cloud computing environments. To solve this problem, we propose an improved prediction method with the simulation-based approach. The proposed method is a fuzzy-logic based priority model for VM migration. We design a proposed model with the DEVS formalism. And we also measure and compare a performance and migration count with existing simulation-based migration method. FPLM shows high utilization.