title: Analyzing the impact of storage shortage on data availability in decentralized online social networks.
abstract: Maintaining data availability is one of the biggest challenges in decentralized online social networks (DOSNs). The existing work often assumes that the friends of a user can always contribute to the sufficient storage capacity to store all data. However, this assumption is not always true in today's online social networks (OSNs) due to the fact that nowadays the users often use the smart mobile devices to access the OSNs. The limitation of the storage capacity in mobile devices may jeopardize the data availability. Therefore, it is desired to know the relation between the storage capacity contributed by the OSN users and the level of data availability that the OSNs can achieve. This paper addresses this issue. In this paper, the data availability model over storage capacity is established. Further, a novel method is proposed to predict the data availability on the fly. Extensive simulation experiments have been conducted to evaluate the effectiveness of the data availability model and the on-the-fly prediction.
authors.affiliation: School of Computer Science, National University of Defense Technology, Changsha 410073, China.
authors.forename: Songling
authors.identifier: 0000-0002-3068-1631
authors.initials: S
authors.lastname: Fu
authors.affiliation: School of Information Science and Engineering, Hunan University, Changsha 410082, China ; Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK.
authors.forename: Ligang
authors.initials: L
authors.lastname: He
authors.affiliation: School of Computer Science, National University of Defense Technology, Changsha 410073, China.
authors.forename: Xiangke
authors.initials: X
authors.lastname: Liao
authors.affiliation: School of Information Science and Engineering, Hunan University, Changsha 410082, China.
authors.forename: Kenli
authors.identifier: 0000-0002-2635-7716
authors.initials: K
authors.lastname: Li
authors.affiliation: School of Computer Science, National University of Defense Technology, Changsha 410073, China.
authors.forename: Chenlin
authors.initials: C
authors.lastname: Huang
mesh_terms: D016247:Information Storage and Retrieval; D008962:Models, Theoretical; D012944:Social Support