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Makes sense. I didn't even think of that... and even with the billion
second rollover not too far behind us.
- Scott
"Duncan Greenwood" <duncan.greenwood AT btinternet DOT com>
12/21/2002 10:03 AM
To: <scott.kendall AT abbott DOT com>
cc: <veritas-bu AT mailman.eng.auburn DOT edu>
Subject: Re: [Veritas-bu] stupid question about retention periods
>> Still doesn't explain why "infinite" retentions show a date of 2038 in
reports... 2147483647 should be more like 68 years, not 36.
I found this explanation of the "Year 2038" issue ...
"In all Unix and POSIX-compliant operating systems, times and dates are
represented internally as the number of seconds
since the UNIX 'epoch', which was the 1st of January 1970 GMT.
32-bit systems can only store a maximum of 2^31 non-negative seconds
(2,147,483,648 seconds or about 68 years). Which
means that 32-bit systems won't be able to process time beyond 19 Jan 2038
at 3:14:07 AM GMT.
One of the common solutions will be to switch to 64-bit architecture
systems
that can store a maximum of 263 non-negative
seconds (9,223,372,036,854,775,808 [9.2 Quintillion] seconds or about
292.27
Billion years), which is about 22 times the
estimated age of our universe!"
D
#
----- Original Message -----
From: <scott.kendall AT abbott DOT com>
To: "Suzanne Palmer" <s.palmer AT umassp DOT edu>
Cc: <veritas-bu AT mailman.eng.auburn DOT edu>
Sent: Saturday, December 21, 2002 12:11 AM
Subject: Re: [Veritas-bu] stupid question about retention periods
> take a look under the covers and you'll see it's all based on seconds.
> /usr/openv/netbackup/db/config/user_retention
>
> with "1 month" they error long instead of short and base it on 31
days...
2678400 seconds
>
> ... kind of explains a few things, like why a backup on Feb 1 held for
"1
> month" is still available first several days of Mar. Still doesn't
> explain why "infinite" retentions show a date of 2038 in reports...
2147483647 should be more like 68 years, not 36.
>
>
> - Scott
>
>
>
>
>
> "Suzanne Palmer" <s.palmer AT umassp DOT edu>
> Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
> 12/17/2002 10:19 AM
>
>
> To: veritas-bu AT mailman.eng.auburn DOT edu
> cc:
> Subject: [Veritas-bu] stupid question about retention
periods
>
>
> okay, probably a dumb question, but here goes...
>
> Under retention levels, there are periods of 1 week, 2 week, 3 week,
> then 1 month. What does one month mean exactly? Does it equate to a
> specific number of days, or does it strictly mean per calendar month
> (thereby varying in length as the months vary)?
>
> Thanks,
>
> -Suzanne
> _______________________________________________
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
>
>
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<br><font size=2 face="Arial">Makes sense. I didn't even think of that...
and even with the billion second rollover not too far behind us.</font>
<br>
<br><font size=2 face="Arial">- Scott</font>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td>
<td><font size=1 face="sans-serif"><b>"Duncan Greenwood"
<duncan.greenwood AT btinternet DOT com></b></font>
<p><font size=1 face="sans-serif">12/21/2002 10:03 AM</font>
<br>
<td><font size=1 face="Arial"> </font>
<br><font size=1 face="sans-serif"> To:
<scott.kendall AT abbott DOT com></font>
<br><font size=1 face="sans-serif"> cc:
<veritas-bu AT mailman.eng.auburn DOT edu></font>
<br><font size=1 face="sans-serif"> Subject:
Re: [Veritas-bu] stupid question about retention
periods</font></table>
<br>
<br>
<br><font size=2 face="Courier New">>> Still doesn't explain why
"infinite" retentions show a date of 2038 in<br>
reports... 2147483647 should be more like 68 years, not 36.<br>
<br>
I found this explanation of the "Year 2038" issue ...<br>
<br>
"In all Unix and POSIX-compliant operating systems, times and dates are<br>
represented internally as the number of seconds<br>
since the UNIX 'epoch', which was the 1st of January 1970 GMT.<br>
<br>
32-bit systems can only store a maximum of 2^31 non-negative seconds<br>
(2,147,483,648 seconds or about 68 years). Which<br>
means that 32-bit systems won't be able to process time beyond 19 Jan 2038<br>
at 3:14:07 AM GMT.<br>
<br>
One of the common solutions will be to switch to 64-bit architecture systems<br>
that can store a maximum of 263 non-negative<br>
seconds (9,223,372,036,854,775,808 [9.2 Quintillion] seconds or about 292.27<br>
Billion years), which is about 22 times the<br>
estimated age of our universe!"<br>
<br>
D<br>
#<br>
<br>
----- Original Message -----<br>
From: <scott.kendall AT abbott DOT com><br>
To: "Suzanne Palmer" <s.palmer AT umassp DOT edu><br>
Cc: <veritas-bu AT mailman.eng.auburn DOT edu><br>
Sent: Saturday, December 21, 2002 12:11 AM<br>
Subject: Re: [Veritas-bu] stupid question about retention periods<br>
<br>
<br>
> take a look under the covers and you'll see it's all based on seconds.<br>
> /usr/openv/netbackup/db/config/user_retention<br>
><br>
> with "1 month" they error long instead of short and base it on
31 days...<br>
2678400 seconds<br>
><br>
> ... kind of explains a few things, like why a backup on Feb 1 held for
"1<br>
> month" is still available first several days of Mar. Still
doesn't<br>
> explain why "infinite" retentions show a date of 2038 in
reports...<br>
2147483647 should be more like 68 years, not 36.<br>
><br>
><br>
> - Scott<br>
><br>
><br>
><br>
><br>
><br>
> "Suzanne Palmer" <s.palmer AT umassp DOT edu><br>
> Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu<br>
> 12/17/2002 10:19 AM<br>
><br>
><br>
> To: veritas-bu AT
mailman.eng.auburn DOT edu<br>
> cc:<br>
> Subject:
[Veritas-bu] stupid question about retention<br>
periods<br>
><br>
><br>
> okay, probably a dumb question, but here goes...<br>
><br>
> Under retention levels, there are periods of 1 week, 2 week, 3 week,<br>
> then 1 month. What does one month mean exactly? Does it equate to a<br>
> specific number of days, or does it strictly mean per calendar month<br>
> (thereby varying in length as the months vary)?<br>
><br>
> Thanks,<br>
><br>
> -Suzanne<br>
> _______________________________________________<br>
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT
edu<br>
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu<br>
><br>
><br>
><br>
<br>
<br>
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