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Database replication policies for dynamic content applications

Gokul Soundararajan, Cristiana Amza, Ashvin Goel
2006 ACM SIGOPS Operating Systems Review  
Our evaluation shows that dynamic replication requires fewer resources than static partitioning or full overlap replication policies and provides over 90% latency compliance to each application under a  ...  We evaluate our dynamic replication system on a commodity cluster with two standard benchmarks: the TPC-W e-commerce benchmark and the RUBIS auction benchmark.  ...  Technology Ontario (CITO) and Canadian Foundation for Innovation (CFI).  ... 
doi:10.1145/1218063.1217945 fatcat:mawpwjty4nd3paqwvisdkgbucu

Database replication policies for dynamic content applications

Gokul Soundararajan, Cristiana Amza, Ashvin Goel
2006 Proceedings of the 2006 EuroSys conference on - EuroSys '06  
Our evaluation shows that dynamic replication requires fewer resources than static partitioning or full overlap replication policies and provides over 90% latency compliance to each application under a  ...  We evaluate our dynamic replication system on a commodity cluster with two standard benchmarks: the TPC-W e-commerce benchmark and the RUBIS auction benchmark.  ...  Technology Ontario (CITO) and Canadian Foundation for Innovation (CFI).  ... 
doi:10.1145/1217935.1217945 dblp:conf/eurosys/SoundararajanAG06 fatcat:easrybeyrnfopjiupty5xbnzqy

General framework for replicable and harmonised guidance [chapter]

2014 Eurostat-OECD Methodological Guide for Developing Producer Price Indices for Services  
Otherwise, it can be argued that the difference could not persist, as rational purchasers would always buy lower priced items and no sales would take place at higher prices.  ...  It is generally assumed in economic analysis that whenever a difference in price is found between two goods and services that appear to be physically identical there must be some other factor, such as  ...  ACKNOWLEDGEMENTS The second edition of the SPPI Guide has been jointly produced by the OECD, Eurostat and a joint Eurostat-OECD Task Force set up to oversee the revision and updating of the 2005 edition  ... 
doi:10.1787/9789264220676-7-en fatcat:dcioxff2jbcp5lqifoacvntqyi

Invalidation-Based Protocols for Replicated Datastores [article]

Antonios Katsarakis
2021 arXiv   pre-print
Distributed in-memory datastores underpin cloud applications that run within a datacenter and demand high performance, strong consistency, and availability.  ...  Consequently, a replication protocol also drives the datastore's performance. Existing strongly consistent replication protocols deliver fault tolerance but fall short in terms of performance.  ...  The number of replicas of a shard is the replication degree, and it presents a trade-off between cost and fault tolerance.  ... 
arXiv:2112.02405v1 fatcat:toi3wflouvbzngpdfzypw3l4li

Asymmetric evolvability leads to specialization without trade-offs [article]

Jeremy Draghi
2020 bioRxiv   pre-print
Many ideas about the evolution of specialization rely on trade-offs--an inability for one organism to express maximal performance in two or more environments.  ...  However, optimal foraging theory suggests that populations can evolve specialization on a superior resource without explicit trade-offs.  ...  Therefore, there are no genetic trade-offs in performance across the environments, and no-cost generalists are possible.  ... 
doi:10.1101/2020.09.11.264481 fatcat:466dx5g6gvh33nia2d6e7anhwy

New evidence on self-affirmation effects and theorized sources of heterogeneity from large-scale replications

Paul Hanselman, Christopher S. Rozek, Jeffrey Grigg, Geoffrey D. Borman
2017 Journal of Educational Psychology  
We found no evidence of effects in this replication study and estimates were precise enough to reject benefits larger than an effect size of 0.10.  ...  We addressed this limitation by conducting a wellpowered replication of self-affirmation in a setting where a previous large-scale field experiment demonstrated significant positive impacts, using the  ...  If this approach proved successful, then policy implications would then depend on the trade-off between greater benefits and costs.  ... 
doi:10.1037/edu0000141 pmid:28450753 pmcid:PMC5403146 fatcat:3wukzzevqra43hj2eu4x77vlly

Effective specialist or jack of all trades? Experimental evolution of a crop pest in fluctuating and stable environments

Anna Skoracka, Alicja Laska, Jacek Radwan, Mateusz Konczal, Mariusz Lewandowski, Ewa Puchalska, Kamila Karpicka‐Ignatowska, Anna Przychodzka, Jarosław Raubic, Lechosław Kuczyński
2022 Evolutionary Applications  
However, the niche expansion resulted in some costs expressed as reduced performances on both wheat and barley as compared to specialists. Stable host environments led to specialized phenotypes.  ...  Types of cultivation, such as crop monocultures versus polycultures or crop rotation, may act as a selective pressure on pests' capability to exploit the host's resources.  ...  We investigated whether temporally stable or variable environments (plant species) drive the evolution of specialization versus generalization, and whether there are trade-offs involved in the evolution  ... 
doi:10.1111/eva.13360 fatcat:zy6sxzav3fbxlbad4yz3kz5vlm

A competitive trade-off limits the selective advantage of increased antibiotic production

Ylaine Gerardin, Michael Springer, Roy Kishony
2016 Nature Microbiology  
Considering this trade-off helps to understand the limited quantities of antibiotics produced in nature 32 , and may explain the prevalence of high molecular weight natural antibiotics (such as colicin  ...  At any given density, there is an intermediate level of antibiotic production that maximizes producer selection, balancing a trade-off between inhibiting sensitive competitors while limiting the advantage  ... 
doi:10.1038/nmicrobiol.2016.175 pmid:27668360 pmcid:PMC5046839 fatcat:e2bj5xny4zbzzm2x36i734pzma

Flower power: Floral and resource manipulations reveal how and why reproductive trade-offs occur for lowbush blueberry (Vaccinium angustifolium )

Alex W. Bajcz, Francis A. Drummond
2017 Ecology and Evolution  
Plant reproductive trade-offs are thought to be caused by resource limitations or other constraints, but more empirical support for these hypotheses would be welcome.  ...  Additionally, quantitative characterization of these trade-offs, as well as consideration of whether they are linear, could yield additional insights. We expanded our  ...  | Trade-off causes-resource limitation Reproductive trade-offs are often thought to result from resource limitations, the logic being if plants had enough resources and could thus invest more into both  ... 
doi:10.1002/ece3.3109 pmid:28808544 pmcid:PMC5551106 fatcat:gyrdhotvhfbihce67wotfdu6te

Medical Costs and Quality of Life 10 to 12 Years After Randomization to Angioplasty or Bypass Surgery for Multivessel Coronary Artery Disease

M. A. Hlatky
2004 Circulation  
CABG had 53% higher costs initially, but the gap closed to Ͻ5% during the first 2 years; after 12 years, the mean cumulative cost of CABG patients was $123 000 versus $120 750 for PTCA, yielding a cost-effectiveness  ...  Background-Coronary bypass surgery (CABG) and angioplasty (PTCA) have been compared in several randomized trials, but data about long-term economic and quality-of-life outcomes are limited.  ...  Acknowledgments This study was supported by grants from the National Heart, Lung, and Blood Institute, Bethesda, Md, and the Robert Wood Johnson Foundation, Princeton, NJ.  ... 
doi:10.1161/01.cir.0000143379.26342.5c pmid:15451795 fatcat:z5vfjb3mcvh3dcuq3b7v4mogmi

Exploring Artificial Neural Networks Efficiency in Tiny Wearable Devices for Human Activity Recognition

Emanuele Lattanzi, Matteo Donati, Valerio Freschi
2022 Sensors  
The main purpose of this study is to empirically explore this trade-off through the characterization of memory usage, energy consumption, and execution time needed by different types of neural networks  ...  The increasing diffusion of tiny wearable devices and, at the same time, the advent of machine learning techniques that can perform sophisticated inference, represent a valuable opportunity for the development  ...  Conclusions, Limitations, and Future Research In this work we have studied the resource cost-accuracy trade off on different artificial neural networks targeted to the real-time classification of daily  ... 
doi:10.3390/s22072637 pmid:35408250 pmcid:PMC9003270 fatcat:jmdmksstivahpeszhwdrycgo34

Organisational ambidexterity and firm performance: burning research questions for marketing scholars

Mathew Hughes
2018 Journal of Marketing Management  
It identifies the fundamental elements and key assumptions of organizational ambidexterity and reveals implications of conflicts among these elements and assumptions.  ...  This paper provides scholars and managers with a detailed analyses, documentary and corpus of reference material documenting the development, definition, theoretical assumptions and conceptual treatment  ...  Tushman and O'Reilly (1996) O'Reilly and Tushman (2008) Jansen et al. (2006 Lavie and Rosenkopf (2006) Lavie, Kang and Rosenkopf (2009) 80 Stadler, Rajwani and Karaba (2014)  ... 
doi:10.1080/0267257x.2018.1441175 fatcat:zkbh26bnkbg7ncgztlsb6nu3zm

Reactive provisioning of backend databases in shared dynamic content server clusters

Gokul Soundararajan, Cristiana Amza
2006 ACM Transactions on Autonomous and Adaptive Systems  
per application performance.  ...  We use a unified approach to load and fault management based on data replication and reactive replica provisioning.  ...  Motivation for Database Replication with Dynamic Resource Allocation In this section, we argue that the trade-offs that we make in our underlying replication technique are worthwhile due to common characteristics  ... 
doi:10.1145/1186778.1186780 fatcat:mbrw3sc4cna4jh6ppq4knrenvm

Evaluating Fund Capacity: Issues and Methods

Michael J. O'Neill, Geoff Warren
2016 Social Science Research Network  
Hence predictive models trade off execution costs against the opportunity costs of missed returns.  ...  We outline how predictive models may allow for the trade-off between execution costs and opportunity costs in either scheduling trades, or more generally in the construction of the portfolio itself.  ...  They use graphs to describe the trade-off between 'immediacy cost' and OC, where the latter accrues at a different rate over time for 'fast' versus 'slow' ideas.  ... 
doi:10.2139/ssrn.2844532 fatcat:4zkoyiqrizhylkdzdw2vkfhx5i

Fiscal policy, net exports, and the sectoral composition of output in Greece

Athanasios O. Tagkalakis
2014 International Economics and Economic Policy  
Tax hikes in particular on social security contributions and other indirect taxes reduce export performance.  ...  This paper investigates the effects of fiscal policy shocks on net export performance and the sectoral composition of output in Greece in the post 2000 period.  ...  Under fixed exchange rates there is no real exchange appreciation so the trade balance is not affected. Non-wage government consumption has limited effects on the trade balance.  ... 
doi:10.1007/s10368-014-0285-8 fatcat:t2becq42wbhxni2acc7ah6lzmy
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