Geo-Distributed Data Centers: Distance and Robustness Trade-Offs

2014 ◽  
Author(s):  
Rodrigo S. Couto ◽  
Stefano Secci ◽  
Miguel Elias M. Campista ◽  
Luis Henrique M.K. Costa
Keyword(s):  
Data Centers ◽  
Distributed Data ◽  
Trade Offs

scholarly journals Exploiting Spatio-Temporal Diversity for Water Saving in Geo-Distributed Data Centers

2018 ◽  
Vol 6 (3) ◽  
pp. 734-746 ◽  
Author(s):  
Mohammad A. Islam ◽  
Kishwar Ahmed ◽  
Hong Xu ◽  
Nguyen H. Tran ◽  
Gang Quan ◽  
...  
Keyword(s):  
Data Centers ◽  
Water Saving ◽  
Distributed Data ◽  
Temporal Diversity ◽  
Spatio Temporal

A Formal Framework for Complex Event Recognition

2021 ◽  
Vol 46 (4) ◽  
pp. 1-49
Author(s):  
Alejandro Grez ◽  
Cristian Riveros ◽  
Martín Ugarte ◽  
Stijn Vansummeren
Keyword(s):  
Query Languages ◽  
Event Recognition ◽  
Distributed Data ◽  
Performance Guarantees ◽  
Selection Strategies ◽  
Trade Offs ◽  
Formal Framework ◽  
Linear Delay ◽  
Complex Events ◽  
Complex Event Recognition

Complex event recognition (CER) has emerged as the unifying field for technologies that require processing and correlating distributed data sources in real time. CER finds applications in diverse domains, which has resulted in a large number of proposals for expressing and processing complex events. Existing CER languages lack a clear semantics, however, which makes them hard to understand and generalize. Moreover, there are no general techniques for evaluating CER query languages with clear performance guarantees. In this article, we embark on the task of giving a rigorous and efficient framework to CER. We propose a formal language for specifying complex events, called complex event logic (CEL), that contains the main features used in the literature and has a denotational and compositional semantics. We also formalize the so-called selection strategies, which had only been presented as by-design extensions to existing frameworks. We give insight into the language design trade-offs regarding the strict sequencing operators of CEL and selection strategies. With a well-defined semantics at hand, we discuss how to efficiently process complex events by evaluating CEL formulas with unary filters. We start by introducing a formal computational model for CER, called complex event automata (CEA), and study how to compile CEL formulas with unary filters into CEA. Furthermore, we provide efficient algorithms for evaluating CEA over event streams using constant time per event followed by output-linear delay enumeration of the results.

Workload Migration across Distributed Data Centers under Electrical Load Shedding

2021 ◽  
Author(s):  
Linfeng Shen ◽  
Fangxin Wang ◽  
Feng Wang ◽  
Jiangchuan Liu
Keyword(s):  
Data Centers ◽  
Load Shedding ◽  
Distributed Data ◽  
Electrical Load

scholarly journals An Optimal Task Placement Strategy in Geo-Distributed Data Centers Involving Renewable Energy

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 61948-61958 ◽  
Author(s):  
Ran Wang ◽  
Yiwen Lu ◽  
Kun Zhu ◽  
Jie Hao ◽  
Ping Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Data Centers ◽  
Distributed Data ◽  
Task Placement

Cost Efficient Design of Fault Tolerant Geo-Distributed Data Centers

2017 ◽  
Vol 14 (2) ◽  
pp. 289-301 ◽  
Author(s):  
Rakesh Tripathi ◽  
S. Vignesh ◽  
Venkatesh Tamarapalli ◽  
Deep Medhi
Keyword(s):  
Data Centers ◽  
Fault Tolerant ◽  
Distributed Data ◽  
Efficient Design ◽  
Cost Efficient
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