[asterisk-users] Simple CDRs

[Anthony Francis]

Dave Platt wrote:
>> I may be over simplifying but I would have a serial number object that 
>> gets incremented anytime it is called and will be set to 0 at start-up. 
>> I would then use it to generate a UUID like this:
>> MAC.serialid.64bit timedate
>>     
>
> I suggest reviewing RFC 4122, which discusses UUID formats in some
> detail.
>
> Your suggestion is very close to a standard "version 1" UUID, which
> includes the host's MAC address, 60 bits of time information, and
> a 14-bit "clock sequence value" (which is set randomly at startup,
> and incremented if the system clock value is adjusted forwards or
> backwards or if the node ID changes).
>
> The time value has a 100-nanosecond resolution, which sets a lower
> limit to the amount of time which may be allowed to pass between
> UUID generation events.  By my math this field won't wrap until
> after the year 5,000 C.E., so we have a while to prepare for the
> "Y5237" wraparound problem :-)
>
>   
I had not reviewed that RFC, I am just a programmer and thought "what 
would I do in this situation". So glad to hear my that my thinking 
wasn't that far off.

Anthony