Re: Cart Unique After Rolling Back Time?
This WebDNA talk-list message is from 2001
It keeps the original formatting.
numero = 37146
interpreted = N
texte = >On 7/11/01 11:12 AM, John Peacock
wrote: > >> Samuel Renkert wrote: >>> >>> Metaphysics aside, is their any guarantees about [cart] still being >>> unique for a given machine after that machine's clock is set to a >>> previous date/time? >>> >> >> As I understand it (Grant can correct me if he wants to), the cart is >> guaranteed to be unique at a point in time and forward, because it is >> created using some hairy combination of time/date/machine specific >> info/etc. >> >> Like the old joke goes Don't do that! >> > >Ah... Well I stand corrected. However, I have changed time on my server with >no adverse effect - that I have seen anyhow =) > >- Charles Nah, you can be right too.It's easy to construct an algorithm that can be safe from a change in time, if you have some other unique part of the algorithm (say, an ever increasing number).W/o the weaknesses of [cart] being well known, it's hard to say how fast and loose you can play.Thanks to both you and John. -Sam------------------------------------------------------------- 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://search.smithmicro.com/
Associated Messages, from the most recent to the oldest:
>On 7/11/01 11:12 AM, John Peacock wrote: > >> Samuel Renkert wrote: >>> >>> Metaphysics aside, is their any guarantees about [cart] still being >>> unique for a given machine after that machine's clock is set to a >>> previous date/time? >>> >> >> As I understand it (Grant can correct me if he wants to), the cart is >> guaranteed to be unique at a point in time and forward, because it is >> created using some hairy combination of time/date/machine specific >> info/etc. >> >> Like the old joke goes Don't do that! >> > >Ah... Well I stand corrected. However, I have changed time on my server with >no adverse effect - that I have seen anyhow =) > >- Charles Nah, you can be right too.It's easy to construct an algorithm that can be safe from a change in time, if you have some other unique part of the algorithm (say, an ever increasing number).W/o the weaknesses of [cart] being well known, it's hard to say how fast and loose you can play.Thanks to both you and John. -Sam------------------------------------------------------------- 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://search.smithmicro.com/
Samuel Renkert
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