Mean-Field Analysis of Coding Versus Replication in Large Data Storage Systems
Mean-Field Analysis of Coding Versus Replication in Large Data Storage Systems
复制标题
大数据存储系统中编码与复制的平均场分析
DOI:
10.1145/3159172
复制
发表时间:
2018
影响因子:
0.6
通讯作者:
Srikant, R.
中科院分区:
文献类型:
--
作者:
Li, Bin;Ramamoorthy, Aditya;Srikant, R.
We study cloud storage systems with a very large number of files stored in a very large number of servers. In such systems, files are either replicated or coded to ensure reliability, i.e., to guarantee file recovery from server failures. This redundancy in storage can further be exploited to improve system performance (mean file-access delay) through appropriate load-balancing (routing) schemes. However, it is unclear whether coding or replication is better from a system performance perspective since the corresponding queueing analysis of such systems is, in general, quite difficult except for the trivial case when the system load asymptotically tends to zero. Here, we study the more difficult case where the system load is not asymptotically zero. Using the fact that the system size is large, we obtain a mean-field limit for the steady-state distribution of the number of file access requests waiting at each server. We then use the mean-field limit to show that, for a given storage capacity per file, coding strictly outperforms replication at all traffic loads while improving reliability. Further, the factor by which the performance improves in the heavy traffic is at least as large as in the light-traffic case. Finally, we validate these results through extensive simulations.
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DOI:
10.1109/tnet.2015.2466453
发表时间:
2014-04
期刊:
IEEE/ACM Transactions on Networking
影响因子:
--
作者:
Yu Xiang;Tian Lan;V. Aggarwal;Y. Chen
通讯作者:
Yu Xiang;Tian Lan;V. Aggarwal;Y. Chen
影响因子:
2.2
作者:
Lu, Yi;Xie, Qiaomin;Greenberg, Albert
通讯作者:
Greenberg, Albert
DOI:
--
发表时间:
2016
期刊:
IEEE INFOCOM 2016 - The 35th Annual IEEE International Conference on Computer Communications
影响因子:
--
作者:
Bin Li;A. Ramamoorthy;R. Srikant
通讯作者:
R. Srikant
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Gauri Joshi
通讯作者:
Gauri Joshi