2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS)最新文献

Generating Optimal Thresholds in a Hysteresis Queue: Application to a Cloud Model 在迟滞队列中生成最佳阈值:在云模型中的应用

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00040

Thomas Tournaire, Hind Castel-Taleb, E. Hyon, Toussaint Hoché

{"title":"Generating Optimal Thresholds in a Hysteresis Queue: Application to a Cloud Model","authors":"Thomas Tournaire, Hind Castel-Taleb, E. Hyon, Toussaint Hoché","doi":"10.1109/MASCOTS.2019.00040","DOIUrl":"https://doi.org/10.1109/MASCOTS.2019.00040","url":null,"abstract":"Reducing the energy consumption of a cloud system while guaranteeing a given quality of service level is a crucial problem encountered today by cloud providers. We consider an auto-scaling model where virtual machines are turned on and off depending on the queue's occupation (or thresholds). This model represents the variability of allocated resources (Virtual Machines or VMs) according to user demands. It can be studied using an hysteresis queuing model, which is represented by a multidimensional Markov chain, whose calculation of the stationary distribution becomes complex when the number of VMs grows. We adopt a cost-aware approach and define a mean cost computed as a reward function on the stationary distribution. This cost takes into account both the performance (for Service Level Agreement: SLA) and the use of the resources (for Energy). We propose efficient optimisation methods to find threshold values minimising the global cost. Because this mean cost is a non-convex function, the research of the optimal value is complex. We propose different optimisation methods: the first one, based on heuristics, coupled with aggregation of the Markov Chain to reduce the execution time and the second one which is a meta heuristic: the Simulated Annealing. Finally, we present a real case of a cloud system that we model and set parameter values to test our optimisation algorithms and show their relevance.","PeriodicalId":149243,"journal":{"name":"2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124456726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Benchmarking Parallel File System Sensitiveness to I/O patterns 基准测试并行文件系统对I/O模式的敏感性

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00054

Konstantinos Chasapis, Jean-Yves Vet, Jean-Thomas Acquaviva

引用次数: 1

A Queuing Model of a Stream-Processing Server 流处理服务器的排队模型

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00014

Thomas Cooper, P. Ezhilchelvan, I. Mitrani

引用次数: 4

Thing in, a research platform for the Web of Things Thing in，物联网研究平台

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00056

Sylvie Derrien, Pierre Meye, Phillippe Raipin

引用次数: 1

Orchestrating Android Malware Experiments 策划Android恶意软件实验

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00057

Jean-François Lalande, Pierre Graux, Tomás Concepción Miranda

引用次数: 0

Optimal Markovian Dynamic Control of Interference-Prone Server Farms 易受干扰服务器群的最优马尔可夫动态控制

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00041

Scott Votke, J. A. Jaleel, Amoghavarsha Suresh, Mohammad Delasay, Sherwin Doroudi, Anshul Gandhi

{"title":"Optimal Markovian Dynamic Control of Interference-Prone Server Farms","authors":"Scott Votke, J. A. Jaleel, Amoghavarsha Suresh, Mohammad Delasay, Sherwin Doroudi, Anshul Gandhi","doi":"10.1109/MASCOTS.2019.00041","DOIUrl":"https://doi.org/10.1109/MASCOTS.2019.00041","url":null,"abstract":"Interference is a key performance challenge faced by cloud users, and can significantly degrade application performance on virtual machines (VMs). For load-balanced cloud applications, a key question is how to distribute the load among VMs in the presence of interference. Using a Markov decision process (MDP) model, we investigate dynamic control polices to assign jobs among a cluster of VMs that are prone to interference in a system with a central queue and an arbitrary number of VMs. We characterize the structural properties of the MDP optimality equation, and we prove that the optimal control policy is a threshold policy based on the queue length. The optimal policy is characterized by multiple thresholds depending on the current conditions of the VMs, including the number of busy under-interference VMs. We discuss the existence of an ordering among such thresholds, and we prove the ordering for a two-VM system. Our numerical results show that the optimal dynamic policy can significantly improve performance compared to the the commonly employed non-idling policy. For low utilization systems, we observe improvements on the order of around 20%. We further implement the optimal policy in a real-world testbed using the HAProxy load balancer, and show that it can reduce web server response times by as much as 40%–60%, even for time-varying request rates.","PeriodicalId":149243,"journal":{"name":"2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130825378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Profiling the Usage of an Extreme-Scale Archival Storage System 分析超大规模档案存储系统的使用情况

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00050

Hyogi Sim, Sudharshan S. Vazhkudai

{"title":"Profiling the Usage of an Extreme-Scale Archival Storage System","authors":"Hyogi Sim, Sudharshan S. Vazhkudai","doi":"10.1109/MASCOTS.2019.00050","DOIUrl":"https://doi.org/10.1109/MASCOTS.2019.00050","url":null,"abstract":"Profiling the archival storage system in scientific computing environments has received much less attention compared to the parallel file system, but is equally important since it stores the final data products safely, for a long duration. In this paper, we analyze eight years worth of data transfer logs for accessing the archival file system (HPSS) in the Oak Ridge Leadership Computing Facility (OLCF), which has been hosting the world's largest supercomputers and file systems. Our analysis encompasses about 135 million data transfer activities to the 80 PB High Performance Storage System (HPSS), between 2010 and 2017. We analyze the logs from several dimensions, including studying the workload characteristics (e.g., access patterns, frequency of accesses and temporal behavior), file system characteristics (e.g., directory depth, file system scaling trends, file types), and scientific user behavior (e.g., domain-specific usage and organization). Based on the analysis, we derive insights into the future evolution of the archive in terms of provisioning, desired features and functionality from the archive software, role and right sizing of the archive tiers, quota management, and the importance of smart and efficient metadata and storage management. We believe our study will prove useful for both operating current archival storage and better provisioning future systems.","PeriodicalId":149243,"journal":{"name":"2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132890219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Application-Aware Adaptive Partitioning for Graph Processing Systems 面向应用的图形处理系统自适应分区

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00033

E. L. Merrer, Gilles Trédan

引用次数: 1

Unicast Inference of Additive Metrics in General Network Topologies 一般网络拓扑中可加度量的单播推理

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00021

M. Rahali, Jean-Michel Sanner, G. Rubino

引用次数: 6

HyperMapper: a Practical Design Space Exploration Framework HyperMapper:一个实用的设计空间探索框架

2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS) Pub Date : 2019-10-01 DOI: 10.1109/MASCOTS.2019.00053

Luigi Nardi, Artur L. F. Souza, D. Koeplinger, K. Olukotun

引用次数: 17