[RRG] DNS Map: Mapping Resolution Combining Pull/Push Advantages

[Christian Vogt <christian.vogt@nomadiclab.com>]

Folks,

previous discussions on this mailing list have identified two main
types of mapping resolution, pull and push systems, both with their
respective benefits:

- Pull systems have comparably low state requirements, enabling finer-
  granular and dynamically generated mappings (e.g., for mobility)

- Push systems have comparably low resolution latency, and hence less
  packet loss in tunnel routers that buffer packets during resolution

I would like to propose DNS Map [1], a DNS-based mapping resolution
system that combines advantages of push and pull systems.  DNS Map
exploits the non-critical time hosts spend waiting for a domain name
resolution, by "pre-fetching" the mappings that tunnel routers are
likely to need in the immediate future.  This allows DNS Map to support
the low state requirements and fine-granular/dynamic mappings of pull
systems, while in many cases limiting mapping resolution latency to
that of push systems.

[1] http://users.piuha.net/chvogt/pub/2008/vogt-2008-dns-map.pdf
    or via RRG homepage

Your comments and opinions will be highly appreciated.

- Christian



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