• Title/Summary/Keyword: storage virtualization

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Trends of Storage Virtualization Technologies on Cloud Computing (클라우드 컴퓨팅에서 스토리지 가상화 기술 동향)

  • Kim, Y.C.;Cha, M.H.;Lee, S.M.;Kim, Y.K.
    • Electronics and Telecommunications Trends
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    • v.24 no.4
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    • pp.69-78
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    • 2009
  • 가상화는 클라우드 컴퓨팅 서비스를 제공하기 위한 기반 기술로 서버, 스토리지, 네트워크 등과 같은 컴퓨팅 자원을 통합 관리하면서 필요에 따라 자원을 할당함으로써 자원 활용률을 높이고 운영 비용을 절감할 수 있도록 한다. 또한 가상화된 자원에 대한 높은 확장성과 안정성을 제공할 수 있다. 최근에 클라우드 컴퓨팅에서 제공하는 스토리지 서비스는 이러한 가상화 기술 중에서 스토리지 가상화 기술을 기반으로 한다. 본 고에서는 클라우드 컴퓨팅 서비스에서 요구하는 스토리지 가상화 기술과 클라우드 스토리지 서비스에 대해 살펴본다.

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.

Performance Analysis of NVMe SSDs and Design of Direct Access Engine on Virtualized Environment (가상화 환경에서 NVMe SSD 성능 분석 및 직접 접근 엔진 개발)

  • Kim, Sewoog;Choi, Jongmoo
    • KIISE Transactions on Computing Practices
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    • v.24 no.3
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    • pp.129-137
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    • 2018
  • NVMe(Non-Volatile Memory Express) SSD(Solid State Drive) is a high-performance storage that makes use of flash memory as a storage cell, PCIe as an interface and NVMe as a protocol on the interface. It supports multiple I/O queues which makes it feasible to process parallel-I/Os on multi-core environments and to provide higher bandwidth than SATA SSDs. Hence, NVMe SSD is considered as a next generation-storage for data-center and cloud computing system. However, in the virtualization system, the performance of NVMe SSD is not fully utilized due to the bottleneck of the software I/O stack. Especially, when it uses I/O stack of the hypervisor or the host operating system like Xen and KVM, I/O performance degrades seriously due to doubled-I/O stack between host and virtual machine. In this paper, we propose a new I/O engine, called Direct-AIO (Direct-Asynchronous I/O) engine, that can access NVMe SSD directly for I/O performance improvements on QEMU emulator. We develop our proposed I/O engine and analyze I/O performance differences between the existed I/O engine and Direct-AIO engine.

Development of Korean Green Business/IT Strategies Based on Priority Analysis (한국의 그린 비즈니스/IT 실태분석을 통한 추진전략 우선순위 도출에 관한 연구)

  • Kim, Jae-Kyeong;Choi, Ju-Choel;Choi, Il-Young
    • Asia pacific journal of information systems
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    • v.20 no.3
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    • pp.191-204
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    • 2010
  • Recently, the CO2 emission and energy consumption have become critical global issues to decide the future of nations. Especially, the spread of IT products and the increased use of internet and web applications result in the energy consumption and CO2 emission of IT industry though information technologies drive global economic growth. EU, the United States, Japan and other developed countries are using IT related environmental regulations such as WEEE(Waste Electrical and Electronic Equipment), RoHS(Restriction of the use of Certain Hazardous Substance), REACH(Registration, Evaluation, Authorization and Restriction of CHemicals) and EuP(Energy using Product), and have established systematic green business/IT strategies to enhance the competitiveness of IT industry. For example, the Japan government proposed the "Green IT initiative" for being compatible with economic growth and environmental protection. Not only energy saving technologies but energy saving systems have been developed for accomplishing sustainable development. Korea's CO2 emission and energy consumption continuously have grown at comparatively high rates. They are related to its industrial structure depending on high energy-consuming industries such as iron and steel Industry, automotive industry, shipbuilding industry, semiconductor industry, and so on. In particular, export proportion of IT manufacturing is quite high in Korea. For example, the global market share of the semiconductor such as DRAM was about 80% in 2008. Accordingly, Korea needs to establish a systematic strategy to respond to the global environmental regulations and to maintain competitiveness in the IT industry. However, green competitiveness of Korea ranked 11th among 15 major countries and R&D budget for green technology is not large enough to develop energy-saving technologies for infrastructure and value chain of low-carbon society though that grows at high rates. Moreover, there are no concrete action plans in Korea. This research aims to deduce the priorities of the Korean green business/IT strategies to use multi attribute weighted average method. We selected a panel of 19 experts who work at the green business related firms such as HP, IBM, Fujitsu and so on, and selected six assessment indices such as the urgency of the technology development, the technology gap between Korea and the developed countries, the effect of import substitution, the spillover effect of technology, the market growth, and the export potential of the package or stand-alone products by existing literature review. We submitted questionnaires at approximately weekly intervals to them for priorities of the green business/IT strategies. The strategies broadly classify as follows. The first strategy which consists of the green business/IT policy and standardization, process and performance management and IT industry and legislative alignment relates to government's role in the green economy. The second strategy relates to IT to support environment sustainability such as the travel and ways of working management, printer output and recycling, intelligent building, printer rationalization and collaboration and connectivity. The last strategy relates to green IT systems, services and usage such as the data center consolidation and energy management, hardware recycle decommission, server and storage virtualization, device power management, and service supplier management. All the questionnaires were assessed via a five-point Likert scale ranging from "very little" to "very large." Our findings show that the IT to support environment sustainability is prior to the other strategies. In detail, the green business /IT policy and standardization is the most important in the government's role. The strategies of intelligent building and the travel and ways of working management are prior to the others for supporting environment sustainability. Finally, the strategies for the data center consolidation and energy management and server and storage virtualization have the huge influence for green IT systems, services and usage This research results the following implications. The amount of energy consumption and CO2 emissions of IT equipment including electrical business equipment will need to be clearly indicated in order to manage the effect of green business/IT strategy. And it is necessary to develop tools that measure the performance of green business/IT by each step. Additionally, intelligent building could grow up in energy-saving, growth of low carbon and related industries together. It is necessary to expand the affect of virtualization though adjusting and controlling the relationship between the management teams.

PosCFS+: A Self-Managed File Service in Personal Area Network

  • Lee, Woo-Joong;Kim, Shi-Ne;Park, Chan-Ik
    • ETRI Journal
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    • v.29 no.3
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    • pp.281-291
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    • 2007
  • Wearable computers consisting of various small devices such as smart phones, digital cameras, MP3 players and specialized I/O devices in personal area networks will play an important role in future ubiquitous computing. In this environment, accessing user data is quite complex due to the dynamic and heterogeneous characteristics of the underlying networks. Moreover, since the amount of user data increases rapidly, automatic data backup management is also critical. To overcome these challenges, several studies have been conducted including our previously proposed file service system, PosCFS, which could be adapted to the requirements with a virtualization technique allowing per-user global namespace for managing and accessing data stored on physical storage spaces detected in PAN. In this paper, we present a smart file service framework, PosCFS+ which is an improved and extended version of our previous work. Performance improvement is made possible by redesigning the metadata management scheme based on database and keywords rather than ontology. In addition, the automatic data replication management is newly designed based on the OSD protocol.

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Auto-configurable Security Mechanism for NFV

  • Kim, HyunJin;Park, PyungKoo;Ryou, Jaecheol
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.12 no.2
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    • pp.786-799
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    • 2018
  • Recently, NFV has attracted attention as a next-generation network virtualization technology for hardware -independent and efficient utilization of resources. NFV is a technology that not only virtualize computing, server, storage, network resources based on cloud computing but also connect Multi-Tenant of VNFs, a software network function. Therefore, it is possible to reduce the cost for constructing a physical network and to construct a logical network quickly by using NFV. However, in NFV, when a new VNF is added to a running Tenant, authentication between VNFs is not performed. Because of this problem, it is impossible to identify the presence of Fake-VNF in the tenant. Such a problem can cause an access from malicious attacker to one of VNFs in tenant as well as other VNFs in the tenant, disabling the NFV environment. In this paper, we propose Auto-configurable Security Mechanism in NFV including authentication between tenant-internal VNFs, and enforcement mechanism of security policy for traffic control between VNFs. This proposal not only authenticate identification of VNF when the VNF is registered, but also apply the security policy automatically to prevent malicious behavior in the tenant. Therefore, we can establish an independent communication channel for VNFs and guarantee a secure NFV environment.

User behavior analysis in No Disk System Configuration (No Disk System 환경에서의 사용자 행위 분석)

  • Kim, Deunghwa;Namgung, Jaeung;Park, Jungheum;Lee, Sangjin
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.23 no.3
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    • pp.491-500
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    • 2013
  • With the advent of big data and increased costs of SSD(HDD), domestic and foreign Internet cafes and organizations have adopted NDS(No Disk System) solution recently. NDS is a storage virtualization solution based on a kind of cloud computing. It manages Operating System and applications in the central server, which were originally managed by individual computers. This research will illustrate the way to analyze user's behaviors under NDS circumstance.

The Design of Active Storage Virtualization System for Information Protection (정보보호를 위한 능동적 스토리지 가상화 시스템 설계)

  • Cho, Kyoung-Ok;Han, Seung-Jo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.9
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    • pp.2040-2048
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    • 2010
  • In contemporary society, though convenience and efficiency of work using information system is growing high, adverse effect problems of malignant code, system hacking, information leak by insiders due to the development of the network are raising their head daily. Because of this, enormous work forces and expenses for the recovery and management of system is needed. The existing system can be divided into two aspects: security solution which surveils and treats virus and malignant codes, and network management solution which observes the system of computer, and practices maintenance and repair such as management, recovery, backup. This treatise applied Active Write Filter mechanism and the technology based on NFS and complemented the maintenance problems of user data of the existing system and designed the system which enables solving problems of intellectual property right such as information protection and illegal work.

Trust Assurance of Data in Cloud Computing Environment (클라우드 컴퓨팅 환경의 데이터 신뢰 확보)

  • Jung, Im-Y.;Jo, In-Soon;Yu, Young-Jin
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.9B
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    • pp.1066-1072
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    • 2011
  • Cloud Computing Environment provides users with a blue print of IT Utopia with virtualization; unbounded computing power and data storage free from the cost and the responsibility of maintenance for the IT resources. But, there are several issues to be addressed for the Cloud Computing Environment to be realized as the blue print because users cannot control the IT resources provided by the Cloud Computing Environment but can only use them. One of the issues is how to secure and to trust data in the Cloud Computing Environment. In this paper, an efficient and practical trust assurance of data with provenance in Cloud Computing Environment.

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.