[Freeipa-users] Unique world wide UIDS

[Adam Young]

On 10/26/2011 09:35 PM, Adam Young wrote:
> On 10/26/2011 08:49 PM, Steven Jones wrote:
>> Hi,
>>
>> Readng the docs on the 32bit UIDs it says it makes an attempt to give 
>> out a unique range....would it be possible / practical if RH (would 
>> want to) ran some sort of database or registration function to try 
>> and insure that?
>>
>>
>> regards
>>
>> Steven Jones
>>
>> Technical Specialist - Linux RHCE
>>
>> Victoria University, Wellington, NZ
>>
>> 0064 4 463 6272
>>
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> No.  It would not be.  Fragmentation of the 32 Bit space means that 
> you are going to have clashes.  Just look at IPv4 addresses and you 
> can see an analogue.  32bits  really means 32 bits, as you have to 
> deal with sometimes things being stored in signed values (Java for 
> instance)  so you have 2^31  or 2,147,483,648.  Which is not quite a 
> quarter of the worlds population.

Wrote this too late at night.  Should read "less than half of the 
world's population"   but the argument stays the same.

> Now, assuming that any organization is going to be smaller than that,  
> you have to figure out how much to give them...they are going to make 
> it a financial decision,  so the US governement buys up  enough to be 
> future proof, lets say 1 Billion,  leaveing a little over 1 Billion 
> for the Rest of the world...then China comes in.  Then India.  You get 
> the idea.
>
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