[chord] The question about Chord system

[Emil Sit]

On Fri, 20 February 2009 at 16:05 (+1100), Zhiyuan Tan wrote:
> In your papers, you mentioned that the keys held by a node will  be 
> relocated to it predecessor when it leave Chord network, but if no one 
> else has the objects (represented by the keys), or if there is some 
> nodes have the objects but not its predecessor what will happen?

If no one else has the objects, then the objects will be lost.
Thus, a system like DHash must replicate and maintain the
number of replicas as nodes fail or leave the system.
Chord itself does not move any objects around.

One mechanism for object maintenance is described in
the UsenetDHT paper:
http://pdos.csail.mit.edu/papers/usenetdht-nsdi08-abstract.html

-- 
Emil Sit / MIT CSAIL PDOS / http://pdos.csail.mit.edu/chord/