Capacity and security of heterogeneous distributed storage systems

Toni Ernvall, Salim El Rouayheb, Camilla Hollanti, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


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 adversary (passive or active) is addressed and bounds on the secure 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.

Original languageEnglish (US)
Article number6678115
Pages (from-to)2701-2709
Number of pages9
JournalIEEE Journal on Selected Areas in Communications
Issue number12
StatePublished - Dec 2013

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


  • Distributed storage systems
  • Information theoretic security
  • Regenerating codes
  • Repair bandwidth
  • network coding


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