工作时间的增加逐渐增大,访问小文件时,其性价比优势更大.这表明,DRAM在数据密集型应用和随
1880
计
算
机学报
2010经
1-7-I
NarayananD,ThereskaEno,DonnellyA
et
a1.Migrating
server
storage
to
SSDs:Analysisoftradeoffs//Proceedings
ofthe4thACMEuropeanConference
on
ComputerSystems
(EuroSys’09).Nuremberg,2009:145—158E83AndersonE,SpeneeS,SwaminathanR
et
a1.Quicklyfind—ing
near-optimal
storagedesigns.ACM
Transactions
on
ComputerSystem,2005,23(4):337—374
[9]StrunkJ,ThereskaE,FaloutsosC,GangerG.Usingutility
to
provisionstorage
systems//ProceedingsoftheUSENIXConference
on
File
andStorage
Technologies.SanJose,
2008:313—328
XUChun Cong,bornin1980,Ph.D.candidate.Hisresearchinterestsincludecloudcomputing
and
distributed
file
system.
HUANG
Xiao Meng,bornin1980,Ph.D.,assistant
professor.His
research
interestsincludedata
grid,cloud
Background
Theworkpresentedinthis
paper
belongs
tothefieldofDistributedFile
SystemandStorageMediumincloudcompu—
ting.Manypeoplehaveproposed
test
solutions0fdisk.SSD
and
DRAM,butmostofthesesolutions
are
aimedat
single
storage
facility.Otherpeoplefocus
on
theresearchofbuild—
ingmass
storage
system
byusingSSD
or
DRAM.Onthis
background,theauthorspropose
a
price—performance
ratio
evaluationmodelof
storage
medium.Theresearchproposed
万方数据
[103
KryderMH。Kim
CS.After
hard
drives—What
comes
next?IEEETransactions
on
Magnetics,2009,45(10)2
3406—3413
[11]
HUXiao-Yu,EleftheriouE,HaasRobert,Iliadisl,Pletka
R.Writeamplificationanalysis
inflash—based
solid
state
drives//ProceedingsoftheSYSTOR2009:TheIsraeliExper—
imentalSystemsConference.Haifa,2009:10-19
[12]
SivathanuG,ZadokE.Aversatile
persistent
cachingframe—
workforfilesystems.StonyBrookUniversity,NewYork:TechnicaI
Report
FSLr05—05.2005
computinganddistributedfilesystem.
WUNuo,bornin1983,Ph.D.candidate.Hisresearch
interestsfocus
on
distributeddata
storagesystem.
SUN
Ning—Wei,bornin1987,bachelor.Hisresearch
interestsfocus
on
distributedfilesystem.
YANG
Guang—Wen,bornin1963。Ph.D.,professor,
Ph.D.supervisor.Hisresearchinterestsincludedatagrid,
cloudcomputinganddistributedstoragesystem.
inthispaper
is
part
ofworksupportedbyChinaGridproject
of
MinistryofEducationofChina。NationalNaturalScience
Foundation
of
China(60803121,60773145,90812001,
60963005),NationalHighTechnologyResearchandDevel—opmentProgram(863Program)OfChina(2010AA012401).
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