Dave,
A computer stores time/date in GMT even if it displays in your local time. The computer just does a + or - on GMT according to the time zone you set and whether you have daylight savings time enabled. The display of the time is usually converted by the OS for your convenience. Since the put time is stored on a message that may move across many time zones, it makes the most sense the store it in GMT which is the universal time. That way all machines, regardless of time zone, can tell what time it really was when the message was put. Otherwise if a message crossed time zones, a message may have a put time that is earlier than the actual time at the destination.
Want to see this in action? Look at a folder in Windows and note the date/time of some files. Change the time change on your Windows settings. After that, refresh or reopen Windows explorer and look at the date/time again. You'll see it has adjusted to the time zone set in the OS. The time is stored in GMT.
Mike Murphy
Sr. Middleware Consultant
MQ Solutions, LLC
"Hill, Dave" <[EMAIL PROTECTED]> wrote:
|
Date Recieved:
| 10/01/2002 07:26:50 AM | |
|
To:
| [EMAIL PROTECTED] | |
|
cc:
| ||
|
Bcc
| ||
|
Subject:
| Re: MSG Put Time |
Glen -
Thank you for the reply. I still am not sure where the GMT is coming from.
That's to say OS390 or WIN2000?
The book says "Greenwich Mean Time (GMT) is used for the 'puttime' 'putdate'
fields, subject to the system clock being set accurately to GMT". I'm pretty
sure the OS390 machine is set and am assured the WIN2000 box is correct
also. I do wonder if OS390 open systems comes into play here and if it
does...............?????. It also mentions a variable on OS2 that can be
set. I can't find anything on this on the OS390 side as well as the Windows
side.
Still hunting.
Dave
-----Original Message-----
From: Glen Larson [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, October 01, 2002 9:54 AM
To: [EMAIL PROTECTED]
Subject: Re: MSG Put Time
dave,
GMT, or zulu time is the standard to use when operating across multiple
time zone. Meteorology is a good example of this, as is the US military.
Since GMT is used in MQ, it is a simple matter to add the local gmt offset
to see when the msg was put on the queue. Otherwise it would require
knowledge about the timezone of the remote system.
I'm sure the guys a Hursley have more details about how and why it was
chosen. But this simplicity makes sense to me.
Glen Larson
"Hill, Dave" <[EMAIL PROTECTED]>@AKH-Wien.AC.AT> on 10/01/2002 07:48:50 AM
Please respond to MQSeries List <[EMAIL PROTECTED]>
Sent by: MQSeries List <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc:
Subject: MSG Put Time
I tried to post this question yesterday but my e-mail was all fused up.
Here it is:
We have an OS390 application sending to a WIN2000 server. When I browse the
Put Time in the Local Queue on Windows the time is GMT and not the "real"
put time. WHY?
Thank you for your time
Dave
Instructions for managing your mailing list subscription are provided in
the Listserv General Users Guide available at http://www.lsoft.com
Archive: http://vm.akh-wien.ac.at/MQSeries.archive
******************* PLEASE NOTE *******************
This E-Mail/telefax message and any documents accompanying this
transmission may contain privileged and/or confidential information and is
intended solely for the addressee(s) named above. If you are not the
intended addressee/recipient, you are hereby notified that any use of,
disclosure, copying, distribution, or reliance on the contents of this
E-Mail/telefax information is strictly prohibited and may result in legal
action against you. Please reply to the sender advising of the error in
transmission and immediately delete/destroy the message and any
accompanying documents. Thank you.
Instructions for managing your mailing list subscription are provided in
the Listserv General Users Guide available at http://www.lsoft.com
Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Instructions for managing your mailing list subscription are provided in
the Listserv General Users Guide available at http://www.lsoft.com
Archive: http://vm.akh-wien.ac.at/MQSeries.archive
