[infinispan-dev] Rehashing on view changes

[Bela Ban]

Quick question: when I have a view {A,B,C,D,E,F} at time T and then 
receive 2 subsequent views within 3 seconds:

- {A,B,C}
- {A,B,C,E,F}

will there be 2 rehashes / rebalancings, or 1 ? Is there a delay that 
can be configured for rebalancing on view changes ?

The reason I'm asking is that I'm working on RELAY for JGroups, which 
will allow for distribution of data across geographically separate 
clusters, e.g. NYC={A,B,C} and SFO={D,E,F}.

NYC and SFO are linked by a relay, and the global view is therefore 
{A,B,C,D,E,F}.

A is responsible for establishing a global view for NYC, and D does the 
same for SFO.

What happens in NYC when D crashes, or leaves is:
- All nodes from the remote cluster are removed from the global view: 
{A,B,C}
- E then takes over as coordinator in SFO and establishes a bridge 
cluster with A, so A now installs {A,B,C,E,F}


-- 
Bela Ban
Lead JGroups / Clustering Team
JBoss