期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Correlation-Aware Replica Prefetching Strategy to Decrease Access Latency in Edge Cloud
1
作者 Yang Liang Zhigang Hu +1 位作者 Xinyu Zhang Hui Xiao 《China Communications》 SCIE CSCD 2021年第9期249-264,共16页
With the number of connected devices increasing rapidly,the access latency issue increases drastically in the edge cloud environment.Massive low time-constrained and data-intensive mobile applications require efficien... With the number of connected devices increasing rapidly,the access latency issue increases drastically in the edge cloud environment.Massive low time-constrained and data-intensive mobile applications require efficient replication strategies to decrease retrieval time.However,the determination of replicas is not reasonable in many previous works,which incurs high response delay.To this end,a correlation-aware replica prefetching(CRP)strategy based on the file correlation principle is proposed,which can prefetch the files with high access probability.The key is to determine and obtain the implicit high-value files effectively,which has a significant impact on the performance of CRP.To achieve the goal of accelerating the acquisition of implicit highvalue files,an access rule management method based on consistent hashing is proposed,and then the storage and query mechanisms for access rules based on adjacency list storage structure are further presented.The theoretical analysis and simulation results corroborate that CRP shortens average response time over 4.8%,improves average hit ratio over 4.2%,reduces transmitting data amount over 8.3%,and maintains replication frequency at a reasonable level when compared to other schemes. 展开更多
关键词 edge cloud access latency replica prefetching correlation-aware access rule
下载PDF
Correlation-aware probabilistic data summarization for large-scale multi-block scientific data visualization
2
作者 Yang Yang Kecheng Lu +2 位作者 Yu Wu Yunhai Wang Yi Cao 《Computational Visual Media》 SCIE EI CSCD 2023年第3期513-529,共17页
In this paper,we propose a correlationaware probabilistic data summarization technique to efficiently analyze and visualize large-scale multi-block volume data generated by massively parallel scientific simulations.Th... In this paper,we propose a correlationaware probabilistic data summarization technique to efficiently analyze and visualize large-scale multi-block volume data generated by massively parallel scientific simulations.The core of our technique is correlation modeling of distribution representations of adjacent data blocks using copula functions and accurate data value estimation by combining numerical information,spatial location,and correlation distribution using Bayes’rule.This effectively preserves statistical properties without merging data blocks in different parallel computing nodes and repartitioning them,thus significantly reducing the computational cost.Furthermore,this enables reconstruction of the original data more accurately than existing methods.We demonstrate the effectiveness of our technique using six datasets,with the largest having one billion grid points.The experimental results show that our approach reduces the data storage cost by approximately one order of magnitude compared to state-of-the-art methods while providing a higher reconstruction accuracy at a lower computational cost. 展开更多
关键词 correlation-awareness large-scale data multi-block methods probabilistic data summarization
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部