UStore：面向新型硬件的统一存储系统屠要峰1,2韩银俊2金浩2陈正华2陈兵11（南京航空航天大学计算机科学与技术学院南京211106）2（中兴通讯股份有限公司南京210012）（tu.yaofeng＠zte.com.cn）UStore:UnifiedStorageSystemforAdvancedHardwareTuYaofeng1,2,HanYinjun2,JinHao2,ChenZhenghua2,andChenBing11（CollegeofComputerScienceandTechnology,NanjingUniversityofAeronauticsandAstronautics,Nanjing211106）2（ZTECorporation,Nanjing210012）AbstractTheexplosivegrowthofdatascalehasmadedistributedstoragewidelyused.Foralongtime,distributedstoragedirectlyusesthelocalfilesystemtoaccesslocalstorageresources.Withtheemergenceofhigh-performanceNVMeSSD,PMEM(persistentmemory),andheterogeneousaccelerationdevices,itisdifficultforthelocalfilesystemtogivefullplaytothefeaturesandperformanceadvantagesofnewhardware.ManyexistingresearcheshaveoptimizedandimprovedtheperformanceaccordingtothehardwarecharacteristicsofSSDorPMEMatthesoftwarelevel.However,thesestudieshavepoorcompatibilityandscalability,cannotflexiblyadapttochangesinthehardwareenvironment,andlackaunifiedsolutionfornewkindsofhardware.AunifiedstoragesystemUStorethatiscompatiblewithmultiplestoragemediaisproposed,whichcanflexiblyselectstoragemediaaccordingtobusinessscenarios,andoptimizethecombineddesignoftypicalhardwaresuchasPMEM,KVSacceleratorcards,andNVMeSSDs,andmakefulluseofitshardwarecharacteristicstomeetmultipleneeds.Throughametadatadesigndecoupledfromthephysicalstoragemedium,UStorecanadapttotheperformanceandatomicupdateabilityofdifferenthardwares,andrealizeaflexiblemetadatamanagementstrategy;throughtheefficientdatamanagementmechanismandupdatestrategy,thelogfreedataatomicwriteguaranteeisrealized,andthewriteamplificationandperformancejitteroftheexistingsystemareeliminated.TheexperimentalresultsshowthatcomparedwithBlueStore,UStore’s4KBrandomreadperformanceisimprovedby3.2×,andthe4KBrandomwriteperformanceisimprovedby8.2×.Underthreetypicalhardwarecombinations,UStoreshowsmatchingdataaccesscharacteristics,givingfullplaytothecharacteristicsandperformanc...
