Subject: [Roll] stateful DAO

From: "Pascal Thubert (pthubert)" <[email-masked]>
Date: Mon, 30 Nov 2009 16:07:22 +0100

Hi:

The recent discussions introduced a number of questions for DAO, even for the stateful case where all nodes actually cache routes.

I'd wish to take the pulse of the ML regarding those questions:

-          D bit. 

o   The D bit is designed to refresh periodically the DAOs over the whole DAG. But it may be lost and some states might not be refreshed

o    Also we found a need for source route where we just need to refresh the DAOs till the next caching node that can dump its own cache.

ð  Proposed solution: add a per node sequence that triggers an update

-          DAO

o   DAO might be lost. Whether that is a DAO or a no-DAO, this causes 

ð  Proposed solution: ACK the DAO , NACK it when the node cannot take more children

-          Fanning out

o   Fanning out might provide some advantages at a cost. The cost is multiplied when doing  source route

ð  Proposed solution: make it a MAY for cached and originators only

What do you think?

Pascal Thubert
IP Engineering TC

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