资源描述：
《a performance study of sequential io on windows nt 4new》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、ndAppearsinProceedingsofthe2USENIXWindowsNTSymposium,Seattle,WA,August3-5,1998.APerformanceStudyofSequentialI/OonWindowsNT™4ErikRiedelCarnegieMellonUniversity,riedel@cmu.eduCatharinevanIngen,JimGrayMicrosoftResearch,{vanIngen,Gray}@microsoft.comAbstractsequentialIOisalsoanimportantfact
2、orinthestartupofinteractiveapplications.MinimizingIOoverheadLarge-scaledatabase,datamining,andmultimediaandmaximizingbandwidthfreespowertoactuallyapplicationsrequirelarge,sequentialtransfersandprocessthedata.havebandwidthasakeyrequirement.Thispaperin-vestigatestheperformanceofreadingan
3、dwritingFigure1showshowdataflowsinamodernstoragelargesequentialfilesusingtheWindowsNT™4.0Filesubsystem.ApplicationrequestsarepassedtothefileSystem.ThestudyexplorestheperformanceofIntelsystem.IfthefilesystemcannotservicetherequestPentiumPro™basedmemoryandIOsubsystems,in-fromitsmainmemor
4、ybuffers,itpassesrequeststoacludingtheprocessorbus,thePCIbus,theSCSIbus,hostbusadapter(HBA)overaPCIperipheralbus.Thethediskcontrollers,andthediskmediainatypicalHBApassesrequestsacrosstheSCSIbustothediskserverorhigh-enddesktopsystem.Weprovidedetailsdrivecontroller.Thecontrollerreadsorwr
5、itesthediskoftheoverheadcostsateachlevelofthesystemandmediaandreturnsdataviathereverseroute.examineavarietyoftheavailabletuningknobs.WeThelarge,boldnumbersinFigure1indicatethead-showthatNTFSout-of-the-boxperformanceisquitevertisedthroughputslistedontheboxesofthevariousgood,butoverheads
6、forsmallrequestscanbequitehardwarecomponents.Thesearethefiguresquotedinhigh.Thebestperformanceisachievedbyusinglargehardwarereviewsandspecifications.Severalfactorsrequests,bypassingthefilesystemcache,spreadingpreventyoufromachievingthisPAP(peakadvertisedthedataacrossmanydisksandcontrol
7、lers,andusingperformance).Themedia-transferspeedandtheproc-deep-asynchronousrequests.Thiscombinationallowsessingpoweroftheon-drivecontrollerlimitdiskustoreachorexceedthehalf-powerpointofallthebandwidth.Thewire’stransferrate,thedisktransferindividualhardwarecomponents.rate,andSCSIprot
