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AFreshPerspectiveonTotalCostofOwnershipModelsforFlashStorageZhengyu Yang[1],ManuAwasthi [2],Mrinmoy Ghosh[2],andNingfang Mi [1]
[1] Electrical&ComputerEngineering,NortheasternUniversity,MA[2] SamsungSemiconductorInc.,MemorySolutionLab,SanJose,CA
GraduateCategory:EngineeringandTechnologyDegreeSeeking:PhDinComputerEngineeringAbstractID#1472
Introduction and Goal• We characterize the write amplification of SSDs as a function of fraction of
sequential writes in a workload.• We plug this WAF function into our proposed TCO model, which also
considers capital and operational cost.• We build the online workload allocation: minTCO-Baseline and minTCO-
Perf.• Experimental results show that minTCO reduces the Total Cost of
Ownership, and minTCO-Perf further balances the load among disks andmaximizes the overall resource utilization.
Write Amplification Factor
We also propose statisticalapproaches for calculatingcomponents that are essential forTCO rate, and data-averagedTCO rate.
Approach: minTCO Allocation Algorithm
Evaluation and Conclusions
TCO Model
This work is published as: Zhengyu Yang, Manu Awasthi, Mrinmoy Ghosh, and Ningfang Mi, "A FreshPerspective on Total Cost of Ownership Models for Flash Storage", 8th IEEE International Conference onCloud Computing Technology and Science (CloudCom 2016), and patents US15/092156 and US15/094971.