Whoosh?
"infinite" is the end of the Unix 32-bit clock. Netbackup tracks everything
in unix epoch time so infinite is set to the end of the clock.
Unix time is a signed 32-bit interger so the end of the clock is
01111111111111111111111111111111 seconds since Jan 1, 1970 00:00:00 (or
0x7FFFFFFF for those of you with sixteen fingers). That equates to 22:14:07
on January 18, 2038, aka: the "Unix Apocalypse".
Fortunately, by then, I'll be retired. For you youngsters out there, the
full conversion to 64-bit apps on 64-bit hardware will push the unix
apocalypse out reaaaallly far. I've forgotten the date but I did calculate
it once and the earth will be a cooling cinder by then.
-M
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Kampen,
Scott
Sent: Thursday, August 04, 2005 3:30 PM
To: Ellwood, MW (Mike); veritas-bu AT eng.auburn DOT edu
Subject: RE: [Veritas-bu] Meaning of 1 Month retention level?
It's funny to note that the number of days for the "infinite" retention
level only equate to 68.09 years (which for the sake of argument is
probably more than enough time for most of us on this list).
I learned in school that infinite was a very long time, but I was always
under the impression it was much longer than 68.09 years. Our purchase
of NetBackup was well worth the money, but finding this bit of
information out about infinity has cleared up a lot of theories I had
about time/space continuum.
Scott
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Ellwood,
MW (Mike)
Sent: Thursday, August 04, 2005 1:06 PM
To: veritas-bu AT eng.auburn DOT edu
Subject: RE: [Veritas-bu] Meaning of 1 Month retention level?
Many thanks Robert; very useful.
I knew about the bpretlevel [-l] command, but I hadn't spotted that
column 2 was the time in seconds! Doh!
Thanks again,
Mike
________________________________
From: Stump, Robert (Contractor) (J6B) [mailto:Robert.Stump.ctr AT dla DOT mil]
Sent: Thu 04/08/2005 18:32
To: Ellwood, MW (Mike); veritas-bu AT eng.auburn DOT edu
Subject: RE: [Veritas-bu] Meaning of 1 Month retention level?
What does the retention level of one month represent by default (in
number of days)?
http://seer.support.veritas.com/docs/268609.htm
Details:
A retention level of one month is by default 31 days. Please note that
this can be changed. Please see TechNote 267037
(http://support.veritas.com/docs/267037 ) for information on what file
is updated if the retention level has been changed.
To determine the value for the retention level, run the following
command:
# bpretlevel -l
0 604800 1 week
1 1209600 2 weeks
2 1814400 3 weeks
3 2678400 1 month
4 5356800 2 months
5 8035200 3 months
6 16070400 6 months
7 24105600 9 months
8 31536000 1 year
9 2147483647 infinite
10 2147483647 infinite
11 2147483647 infinite
12 2147483647 infinite
The second column is in seconds, so for example, a retention level 3 = 1
month or 2678400 seconds = 31 days.
Related Documents:
267037: When changing the retention period of a retention level, what
file is created/updated to record the new parameters?
-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Ellwood,
MW (Mike)
Sent: Thursday, August 04, 2005 1:04 PM
To: veritas-bu AT eng.auburn DOT edu
Subject: [Veritas-bu] Meaning of 1 Month retention level?
I thought I had read that a retention period of "1 month" was
interpreted by Netbackup as "31 days".
I only recently realised that you could set the RL to mean an exact
number of explicit days.
We used to have our standard RL of 3 set to "one month", and as an
experiment I changed it To "28 days".
We did some backups, and now wanted to recalculate those back to "1
month".
I changed the meaning of RL=3 back to one month, and recalculated
certain backups.
I'm not 100% sure, but it looks to be like it might be interpreting this
as one calendar month.
(I have yet to see how it will interpret the RL for new backups)
Any one with any extensive experience of this sort of thing?
(nb, we happen to be on a rather old level, 3.4GA)
Thanks.
Mike Ellwood
BITD, EBU, ELS
R27-F33 Atlas Centre
CCLRC Rutherford Appleton Laboratory
Chilton, DIDCOT, Oxon, OX11 0QX
Tel: +44 (0)1235 446161 Email: m.w.ellwood AT rl.ac DOT uk
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