Re: unique ascending numbers
This WebDNA talk-list message is from 2003
It keeps the original formatting.
numero = 50196
interpreted = N
texte = Chris List Recipient wrote: > I would guess that multiple cart numbers generated in the same epoc second > are not necessarily ascending due to the random (not ascending) characters > appended. Have you actually observed multiple carts being generated in a single second or are you SWAG[1]ing? My understanding of what Grant described about the proprietary cart format was that the subsecond uniquifiers were an incrementing WebDNA kernal counter. Random number generation is not sufficient to be demonstratably unique, since the sequence 1,2,3,4,5,5,5,5,5,4,5,3,2,1 can be considered part of a random sequence. Additionally, random number generation is typically very processor intensive (without a hardware RNG), so it is not really suitable to be doing lots of them when the CPU is already being asked to handle lots of traffic.John[1] http://www.netlingo.com/lookup.cfm?term=SWAG-- John Peacock Director of Information Research and Technology Rowman & Littlefield Publishing Group 4720 Boston Way Lanham, MD 20706 301-459-3366 x.5010 fax 301-429-5747 ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list
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Associated Messages, from the most recent to the oldest:
Chris List Recipient wrote: > I would guess that multiple cart numbers generated in the same epoc second > are not necessarily ascending due to the random (not ascending) characters > appended. Have you actually observed multiple carts being generated in a single second or are you SWAG[1]ing? My understanding of what Grant described about the proprietary cart format was that the subsecond uniquifiers were an incrementing WebDNA kernal counter. Random number generation is not sufficient to be demonstratably unique, since the sequence 1,2,3,4,5,5,5,5,5,4,5,3,2,1 can be considered part of a random sequence. Additionally, random number generation is typically very processor intensive (without a hardware RNG), so it is not really suitable to be doing lots of them when the CPU is already being asked to handle lots of traffic.John[1] http://www.netlingo.com/lookup.cfm?term=SWAG-- John Peacock Director of Information Research and Technology Rowman & Littlefield Publishing Group 4720 Boston Way Lanham, MD 20706 301-459-3366 x.5010 fax 301-429-5747 ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
John Peacock
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