Capacity and Security of Heterogeneous Distributed Storage Systems. (arXiv:1211.0415v1 [cs.DC])

from cs.IT updates on arXiv.org http://arxiv.org/abs/1211.0415

We study the capacity of heterogeneous distributed storage systems under
repair dynamics. Examples of these systems include peer-to-peer storage clouds,
wireless, and Internet caching systems. Nodes in a heterogeneous system can
have different storage capacities and different repair bandwidths. We give
lower and upper bounds on the system capacity. These bounds depend on either
the average resources per node, or on a detailed knowledge of the node
characteristics. Moreover, we study the case in which nodes may be compromised
by an eavesdropper, and give bounds on the system secrecy capacity. One
implication of our results is that symmetric repair maximizes the capacity of a
homogeneous system, which justifies the model widely used in the literature.

Advertisements

发表评论

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / 更改 )

Twitter picture

You are commenting using your Twitter account. Log Out / 更改 )

Facebook photo

You are commenting using your Facebook account. Log Out / 更改 )

Google+ photo

You are commenting using your Google+ account. Log Out / 更改 )

Connecting to %s