Distributed File System prof. Giovanni Chiola

Fault-Tolerance


Data should not be lost even in case of failures of:
  • Client machine
  • Some of the server machines (including disks)
  • Network connection
Network failures can often be assumed transient.
Server failures can be either transient or permanent.
Permanent failures can be overcome by redundancy in data storage and transparent reconfiguration.
Transient failures can be overcome by appropriate caching, update protocols, and consistency checks.
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