Load balanced distributed directories

Shishir Rai, Gokarna Sharma, Costas Busch, Maurice Herlihy

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We present LB-SPIRAL, a novel distributed directory protocol for shared objects, suitable for large-scale distributed shared memory systems. Each shared object has an owner node that can modify its value. The ownership may change by moving the object from one node to another in response to move requests. The value of an object can be read by other nodes with lookup requests. The distinctive feature of LB-SPIRAL is that it balances the processing load on nodes in addition to minimizing the communication cost in general network topologies. In contrast, the existing distributed directory protocols for general network topologies only minimize the communication cost. In particular, LB-SPIRAL achieves poly-log approximation for both load and communication cost in general networks with respect to the problem parameters. Simulation results show that the established theoretical results translate well in practice.

Original languageEnglish (US)
Article number104700
JournalInformation and Computation
StatePublished - May 2022


  • Approximation
  • Congestion
  • Directories
  • Distributed systems
  • Hierarchical clustering
  • Load balancing
  • Processing load
  • Stretch

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Information Systems
  • Computer Science Applications
  • Computational Theory and Mathematics


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