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Deduplicerings påverkan på effektförbrukningen: en studie av deduplicering i ZFS
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Uppsatsen beskriver arbetet och undersökning för hur deduplicering i filsystemet ZFS påverkar effektförbrukningen. En större mängd redundant data förekommer i centraliserade lagringssystem som förser virtualiserade servrar med lagringsutrymme. Deduplicering kan för den typen av lagringsmiljö eliminera redundant data och ger en stor besparing av lagringsutrymme. Frågan som undersökningen avsåg att besvara var hur ett lagringssystem påverkas av det extra arbete som det innebär att deduplicera data i realtid.Metoden för att undersöka problemet var att utföra fem experiment med olika typer av scenarion. Varje scenario innebar att filer kopierades till ett lagringssystem med eller utan deduplicering för att senare kunna analysera skillnaden. Dessutom varierades mängden deduplicerbar data under experimenten vilket skulle visa om belastningen på hårddiskarna förändrades.Resultatet av experimenten visar att deduplicering ökar effektförbrukning och processorbelastning medan antalet I/O-operationer minskar. Analysen av resultatet visar att med en stigande andel deduplicerbar data som skrivs till hårddiskarna så stiger också effektförbrukning och processorbelastning.

Abstract [en]

This report describes the process and outcome of the research on how the power consumption is affected by deduplication in a ZFS file system. A large amount of redundant data exists in centralized storage systems that provide virtualized servers with storage space. Deduplication can be used to eliminate redundant data and give an improved utilization of available space in this kind of storage environment. The question that the study sought to answer was how a storage systems power consumption is affected by the extra workload deduplication introduces.The method used to investigate the problem was to perform five experiments with different types of scenarios. The difference in each scenario was that the data was written to a storage system with or without deduplication to later analyze the difference. Each scenario had a varied amount deduplicatable data during the experiments which would show if the load on disks changed.The results show that deduplication increases the power consumption and CPU load while the I/O-operations decrease. The analysis of the result shows that increasing the deduplicatable data also increases the power consumption and CPU load.

Place, publisher, year, edition, pages
2011. , 22 p.
Keyword [en]
Deduplication, Power consumption, CPU load, I/O operations, Storage system, ZFS
Keyword [sv]
Deduplicering, Effektförbrukning, Processorbelastning, I/O-operationer, Lagringssystem, ZFS
Identifiers
URN: urn:nbn:se:lnu:diva-12717OAI: oai:DiVA.org:lnu-12717DiVA: diva2:424534
Educational program
IT Technician, 120 credits
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-06-21 Created: 2011-06-18 Last updated: 2011-06-21Bibliographically approved

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