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<H1>Using system time for ObjectIDs</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Using system time for ObjectIDs</LI>
<LI><em>From</em>: <A HREF="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</A></LI>
<LI><em>Date</em>: Thu, 10 Apr 97 18:41:04 -0700</LI>
<LI><em>Reply-to</em>: <A HREF="mailto:claw#null,net">claw#null,net</A></LI>
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<PRE>
In <199704100657.GAA186538#out1,ibm.net>, on 04/09/97
at 11:12 PM, Jeff Kesselman <jeffk#tenetwork,com> said: >At 10:08
AM 4/9/97 -0400, you wrote:
>>That almost seems too easy and I can't help but think I've missed
>>something...
>Well, it seems a touch fragile in that it depnds on an external
>setting 9the clock0 to always be reasonably correct and unique....
Usually not a problem with a decent NTP daemon.
>What about daylight savings tiem in the fall, when the clock gets set
>back?
Most OS'es (I think even BE falls into this camp, and of course all
the *nixes do) allow a system time which does not alter with DST, and
then a variant offset from that base time (see the full TZ variable
expansions sometime for a laugh).
>Also what if the system clock jus rtgets fouled thorugh hardware or
>software failure?
You are screwed. It could also be easily argued that your system is
also seriously screwed as well. I view not having a reasonably
accurate system time as a system-panic-worthy catastrophe.
>This scheme (dates) is good for short term thing like temp ids or
>random seeds but ild be scared to use it long term.
Its been working great hear for almost a year -- and that's on a PC
with a known slippy clock (and thrice daily synch's to NIST).
--
J C Lawrence Internet: claw#null,net
(Contractor) Internet: coder#ibm,net
---------------(*) Internet: clawrenc#cup,hp.com
...Honorary Member Clan McFUD -- Teamer's Avenging Monolith...
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: Just a bit of musing</STRONG>, <EM>(continued)</EM>
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<LI><strong><A NAME="00098" HREF="msg00098.html">Re: Just a bit of musing</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Sat 12 Apr 1997, 08:51 GMT
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<LI><strong><A NAME="00111" HREF="msg00111.html">Re: Just a bit of musing</A></strong>,
Nathan Yospe <a href="mailto:yospe#hawaii,edu">yospe#hawaii,edu</a>, Sun 13 Apr 1997, 07:55 GMT
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<LI><strong><A NAME="00114" HREF="msg00114.html">Fw: Just a bit of musing</A></strong>,
Travis Casey <a href="mailto:casey#NU,cs.fsu.edu">casey#NU,cs.fsu.edu</a>, Sun 13 Apr 1997, 09:33 GMT
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<LI><strong><A NAME="00130" HREF="msg00130.html">Re: Just a bit of musing</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Mon 14 Apr 1997, 23:13 GMT
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<LI><strong><A NAME="00097" HREF="msg00097.html">Using system time for ObjectIDs</A></strong>,
clawrenc <a href="mailto:clawrenc#cup,hp.com">clawrenc#cup,hp.com</a>, Sat 12 Apr 1997, 08:41 GMT
<LI><strong><A NAME="00086" HREF="msg00086.html">Of disk swapping, database structure & project management..</A></strong>,
Greg Munt <a href="mailto:greg#uni-corn,demon.co.uk">greg#uni-corn,demon.co.uk</a>, Sat 12 Apr 1997, 03:40 GMT
<UL>
<li><Possible follow-up(s)><br>
<LI><strong><A NAME="00100" HREF="msg00100.html">Re: Of disk swapping, database structure & project management..</A></strong>,
Jeff Kesselman <a href="mailto:jeffk#tenetwork,com">jeffk#tenetwork,com</a>, Sat 12 Apr 1997, 11:04 GMT
</LI>
<LI><strong><A NAME="00102" HREF="msg00102.html">Re: Of disk swapping, database structure & project management..</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sat 12 Apr 1997, 12:57 GMT
</LI>
<LI><strong><A NAME="00107" HREF="msg00107.html">Re: Of disk swapping, database structure & project management..</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Sun 13 Apr 1997, 00:16 GMT
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