re: [RRG] Will the flat ID and its corresponding resolution infrastracture be practicable? [RRG] Renumbering...

[Xu Xiaohu <xuxh@huawei.com>]

> 
> I can't find Tony's original mail but replying to your reply ...
> 
> > Tony Li wrote:
> 
> > Now, if someone has some mapping technology that does not require 
> > aggregation at all (DHTs?), then there is a possible alternate to 
> > NATs.
> 
> To scale, DHTs would simply transform aggregation into 
> iterative lookup.
>  There is no difference in the amount of effort.

Agree.  However, if the IDs are not allocated in any hierarchy and they are
randomly scattered across the DHT overlay, the lookup speed will be
decreased heavily. Of course, the tree-like mapping system like DNS or ALT
has the same issue. So no matter DNS like mapping system or DHT, to make it
scale better(in aspect of lookup speed) , the id should be allocated in some
geographically aggregatable manner. Strict hierarchy is not flexible to
support ID roaming since it may require some renumbering work, while the
full flat structure is also not feasible. It's better to make some tradeoff.
For example, you don't need to renumber the ID if you migrate from one city
to another city within the same country. However, you'd better to renumber
it if you migrate from one country to another country.

Xiaohu Xu



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