[Nfd-dev] smart flooding strategy

[Junxiao Shi]

Hi Lan

The access router strategy will not attempt to probe other nexthops, until
the "last working nexthop" fails. If two laptops can provide the same
contents, after the faster laptop fails, the strategy will stick with the
slower laptop, even if the faster laptop recovers.
In reality, most contents are served from a single laptop which might move.
The strategy design didn't consider the scenario where multiple laptops can
serve same contents. This design may change in a future version of the
strategy.

RTO is calculated using the mean-deviation algorithm (same as TCP), but
there's no multiplier.

Measurements expiration is not specified in the design. This will be fixed
in Bug 2452.

The implementation accurately follows access-router-strategy_20141220.pptx
design.

Yours, Junxiao

On Fri, Jan 30, 2015 at 7:47 AM, Lan Wang (lanwang) <lanwang at memphis.edu>
wrote:

>  Junxiao,
>
>  A question: how does the access strategy revert back to the best path
> after a link on the best path recovers from a failure?
>
>  Regarding the design of the access route strategy when RTO expires, two
> questions:
>
>  - what is the formula for RTO calculation?
>
>  - how is the expiration handled?  I read the issues but it is still
> unclear to me what's finally implemented.  Do the ppt slides at (
> http://redmine.named-data.net/issues/1999) reflect the latest design?
>
>  Lan
>
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