[Fedora-directory-users] upperlimit on uidNumber

[George Holbert]

http://kbase.redhat.com/faq/FAQ_80_6231.shtm

I think Solaris also supports 32-bit uids, not sure about other OSes.

mj at sci.fi wrote:
>> I was wondering if there is an upper limit on the uid or the 
>> gidNumber in
>> fds.
>> Or is there a limit on OS level? Does anyone know what it is? Is this
>> different between the RedHat releases?
>> Is it different from other Unixes?
>
> I have personally loaded 10 million user accounts into FDS as a 
> performance test (on a measly 2.4Ghz P4 machine with 512MB of RAM), 
> and it worked just fine; not sure how many it could theoretically hold.
>
> The linux kernel has officially had support for 32-bit uidnumbers 
> since kernel v2.4, so the maximum user id number is 4294967295, or 
> approximately 4.3 billion. This is the same on any distribution using 
> kernel 2.4 or newer. I am not  sure about UNIX...
>
> -- 
> mike
>
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