TY - GEN
T1 - Capacity and security of heterogeneous distributed storage systems
AU - Ernvall, Toni
AU - El Rouayheb, Salini
AU - Hollanti, Camilla
AU - Poor, H. Vincent
PY - 2013
Y1 - 2013
N2 - The capacity of heterogeneous distributed storage systems under repair dynamics is studied. 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. Lower and upper bounds on the system capacity are given. These bounds depend on either the average resources per node, or on a detailed knowledge of the node characteristics. Moreover, the case in which nodes may be compromised by an eavesdropper is addressed and bounds on the secrecy capacity of the system are derived. One implication of these new results is that symmetric repair maximizes the capacity of a homogeneous system, which justifies the model widely used in the literature.
AB - The capacity of heterogeneous distributed storage systems under repair dynamics is studied. 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. Lower and upper bounds on the system capacity are given. These bounds depend on either the average resources per node, or on a detailed knowledge of the node characteristics. Moreover, the case in which nodes may be compromised by an eavesdropper is addressed and bounds on the secrecy capacity of the system are derived. One implication of these new results is that symmetric repair maximizes the capacity of a homogeneous system, which justifies the model widely used in the literature.
UR - http://www.scopus.com/inward/record.url?scp=84890407484&partnerID=8YFLogxK
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U2 - 10.1109/ISIT.2013.6620426
DO - 10.1109/ISIT.2013.6620426
M3 - Conference contribution
AN - SCOPUS:84890407484
SN - 9781479904464
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 1247
EP - 1251
BT - 2013 IEEE International Symposium on Information Theory, ISIT 2013
T2 - 2013 IEEE International Symposium on Information Theory, ISIT 2013
Y2 - 7 July 2013 through 12 July 2013
ER -