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| 1 | Improving Scalability of Cloud Monitoring Through PCA-Based Clustering of Virtual Machines显示文摘Cloud computing has recently emerged as a leading paradigm to allow customers to run their applications in virtualized large-scale data centers. Existing solutions for monitoring and management of these infrastructures consider virtual machines(VMs) as independent entities with their own characteristics. However, these approaches sufer from scalability issues due to the increasing number of VMs in modern cloud data centers. We claim that scalability issues can be addressed by leveraging the similarity among VMs behavior in terms of resource usage patterns. In this paper we propose an automated methodology to cluster VMs starting from the usage of multiple resources, assuming no knowledge of the services executed on them. The innovative contribution of the proposed methodology is the use of the statistical technique known as principal component analysis(PCA) to automatically select the most relevant information to cluster similar VMs. We apply the methodology to two case studies, a virtualized testbed and a real enterprise data center. In both case studies, the automatic data selection based on PCA allows us to achieve high performance, with a percentage of correctly clustered VMs between 80% and 100% even for short time series(1 day) of monitored data. Furthermore, we estimate the potential reduction in the amount of collected data to demonstrate how our proposal may address the scalability issues related to monitoring and management in cloud computing data centers. | Claudia Canali Riccardo Lancellotti | 2014 | Journal of Computer Science & Technology2014，29，1： | 3 |
| 2 | Utilisation of homogeneous and supported chiral metal(Salen) complexes in asymmetric catalysis显示文摘 | Canali L Sherrington D C | 1999 | Chem Soc Rev1999，28，： | 2 |
| 3 | Bone Morphogenetic Proteins, Their Antagonists, and the Skeleton显示文摘 | Ernesto Canalis Aris N. Economides Elisabetta Gazzerro | 2003 | Endocrine Reviews2003，，2： | 2 |
| 4 | Impact of Thrombectomy With EXPort Catheter in Infarct-Related Artery During Primary Percutaneous Coronary Intervention (EXPIRA Trial) on Cardiac Death显示文摘 | Gennaro Sardella Massimo Mancone Emanuele Canali Angelo Di Roma Giulia Benedetti Rocco Stio Roberto Badagliacca Luigi Lucisano Luciano Agati Francesco Fedele | 2010 | The American Journal of Cardiology2010，，5： | 2 |
| 5 | Single-crystal laser deposition of superalloys: processing–microstructure maps显示文摘 | M. G?umann C. Bezen?on P. Canalis W. Kurz | 2001 | Acta Materialia2001，，6： | 2 |
| 6 | Rhinocerebral mucormycosis: evolution of the disease and treatment options显示文摘 | PETERSON K L WANG M CANALIS R F | 1997 | Laryngoscope1997，107，： | 1 |
| 7 | Insulin-like growth factor I has independent effects on bone matrix formation and cell replication显示文摘 | HOCK J M CENTRELLA M CANALIS E | 1988 | Endocrinology1988，122，1： | 1 |
| 8 | Interactive action of the white cont effect and the biood pressure levels on cardiovascular amplications in hypertension显示文摘 | Palatini P Penzo M Canali C | 1997 | Am J Med1997，103，2： | 1 |
| 9 | Mechanisms of glucocorticoid action in bone:implications to glucocorticoid-induced osteoporosis 显示文摘 | Canalis B | 1996 | J Clin Endocrinol Metab1996，81，： | 1 |
| 10 | Effects of cortisol and bone morphogenetic protein-2 on stromal cell differentiation: correlation with CCAATenhancer binding protein expression显示文摘 | Pereira RC Delany AM Canalis E | 2002 | Bone2002，30，5： | 1 |
| 11 | Clinical review 35 growth factors and their potential clinical value显示文摘 | CANALIS E J | 1992 | Clin Endocrinol Metaabe1992，75，1： | 1 |
| 12 | Intracellular zinc is required for intestinal cell survival signals triggered by the inflammatory cytokine TNFα显示文摘 | Giulia Ranaldi Simonetta Ferruzza Raffaella Canali Guido Leoni Peter D. Zalewski Yula Sambuy Giuditta Perozzi Chiara Murgia | 2013 | The Journal of Nutritional Biochemistry2013，，6： | 1 |
| 13 | Triiodothyronine induces colla-genase-3 and gelatinase B expression in murine osteoblasts显示文摘 | Pereira RC Jorgetti V Canalis E | | 0，，： | 1 |
| 14 | Autocrine down regulation of collagenase-3 in rat bone cell cultures by insulin-like growth factors显示文摘 | Delany AM Rydziel S Canalis E | 1996 | Endocrinology1996，137，： | 1 |
| 15 | Electron and Hole Drift Velocity Measurements in Silicon and Their Empirical Relation to Electric Field and Temperature显示文摘 | Canali C Majni G Minder G | 1975 | IEEETransactions on Electronic Devices1975，22，11： | 1 |
| 16 | Impact of thrombectomy with EXPort Catheter in Infarct-Related Artery during Primary Percutaneous Coronary Intervention(EXPIRA Trial)on cardiac death显示文摘 | Sardella G Mancone M Canali E | 2010 | Am J Cardiol2010，106，5： | 1 |
| 17 | Growth hormone,insulin like growth factors,and the skeleton显示文摘 | Giustina A Mazziotti G Canalis E | | 0，，： | 1 |
| 18 | Glucocorticoid-in- duced osteoporosis: pathophysiology and therapy 显示文摘 | Canalis E Mazziotti G Giustina A | 2007 | Osteoporos Int2007，18，10： | 1 |
| 19 | Implications to glucocorticoid in duced osteoporosis显示文摘 | Canalis E Clinical | 1996 | J Clin Endocrinol Metab1996，81，： | 1 |
| 20 | Synthesis of resins with pendently-bound chiral manganese-salen complexes and used as heterogeneous asymmetrie alkene epoxidation catalysts显示文摘 | CANALI L SHERRINGTON H DELUZE H | 1999 | Reactive and Functional Polymers1999，40，： | 1 |
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