Reference Sets (Shapiro)
- Like IRC but instead of keeping counters, keeps reference sets
of spaces.
- Processes in the reference sets can be contacted to ask them
if they still keep the reference.
- If a process seems to be crashed, it is removed from the client set.
- When a process P, has executed a remote invocation r.M(), the owner
of the object referenced by r becomes the father of r. Q sends a clean
call to its old father.
Advantage: fault tolerant.
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