Re: Timezone change.
On the z/OS side, we had some issues that we raised to IBM via an ETR. We ended up adding a line to CEECOPT (LE Options) that specified the month, week and time to change the clocks (US East Coast time was a default that we used (probably without even realizing it). Certainly, the C localtime calls that we do worked correctly with the added line to CEECOPT. An IBM APAR gave us some issues as we currently have some of our systems at different PTF levels. Is there a similar file to change under z/VM? Kevin -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Jose Raul Baron Sent: Wednesday, March 21, 2007 5:32 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Yes, I have also date related problems: In Madrid it's now 10'30 local time. But: date mié mar 21 11:30:45 CET 2007 The DOW is correct and so is the date but the time is one hour in advance. Don't know how to handle this. -Mensaje original- De: Linux on 390 Port [mailto:[EMAIL PROTECTED] En nombre de Goodwin, Derric Enviado el: martes, 20 de marzo de 2007 22:56 Para: LINUX-390@VM.MARIST.EDU Asunto: Re: Timezone change. We patched all of our z/systems and when we rebooted some of them defaulted back to UTC and the time was showing off. I reset them via yast to reflect localtime and everything went well after IPL. The following (DST weekend) I patched all my systems, made sure they were reflecting localtime and now after IPL they are showing up on UTC time, but in yast their are showing up as localtime. Any ideas why some of my guests (across different lpars) boot in UTC even though they show localtime and why some of my guests never had a problem with this and always ipl into the correct hardware clock mode? Anyone else experience this problem? Could it have something to do with VM and how the guest is picking up its time on ipl? Thanks. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Kevin, The corresponding LE change on VM is in the EDCLOCI ASSEMBLE file. From the MAINT userid enter: VMFSETUP ZVM LESFS CUSTLE ZVM LESFS select option 3, 'C Locale Time Info' I'm using the following for Eastern time in EDCLOCI ASSEMBLE, right or wrong. EDCLOCI EDCLOCTZ TZDIFF=300,TNAME='EST', * DSTSTM=3,DSTSTW=2,DSTSTD=0,STARTTM=7200,SHIFT=3600, * DSTENM=11,DSTENW=1,DSTEND=0,ENDTM=7200,DSTNAME='EDT', * UCTNAME='UTC' After filing the changes, CUSTLE will assemble the file and build the new modules. VMFCOPY the new modules to the MAINT 19E, and save CMS. The LE shared segments SCEE and SCEEX will have to be rebuild for the new modules. Also, Language Environment APAR VM64117 / PTF UM31924 provides needed changes to several C/C++ library functions. Reference http://www.vm.ibm.com/service/DST2007.html for z/VM DST changes. Interestingly, EDCLOCI ASSEMBLE is not mentioned on that web page. Robert Hodge -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Evans, Kevin R Sent: Thursday, March 22, 2007 3:33 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. On the z/OS side, we had some issues that we raised to IBM via an ETR. We ended up adding a line to CEECOPT (LE Options) that specified the month, week and time to change the clocks (US East Coast time was a default that we used (probably without even realizing it). Certainly, the C localtime calls that we do worked correctly with the added line to CEECOPT. An IBM APAR gave us some issues as we currently have some of our systems at different PTF levels. Is there a similar file to change under z/VM? Kevin -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Jose Raul Baron Sent: Wednesday, March 21, 2007 5:32 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Yes, I have also date related problems: In Madrid it's now 10'30 local time. But: date mié mar 21 11:30:45 CET 2007 The DOW is correct and so is the date but the time is one hour in advance. Don't know how to handle this. -Mensaje original- De: Linux on 390 Port [mailto:[EMAIL PROTECTED] En nombre de Goodwin, Derric Enviado el: martes, 20 de marzo de 2007 22:56 Para: LINUX-390@VM.MARIST.EDU Asunto: Re: Timezone change. We patched all of our z/systems and when we rebooted some of them defaulted back to UTC and the time was showing off. I reset them via yast to reflect localtime and everything went well after IPL. The following (DST weekend) I patched all my systems, made sure they were reflecting localtime and now after IPL they are showing up on UTC time, but in yast their are showing up as localtime. Any ideas why some of my guests (across different lpars) boot in UTC even though they show localtime and why some of my guests never had a problem with this and always ipl into the correct hardware clock mode? Anyone else experience this problem? Could it have something to do with VM and how the guest is picking up its time on ipl? Thanks. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Yes, I have also date related problems: In Madrid it's now 10'30 local time. But: date mié mar 21 11:30:45 CET 2007 The DOW is correct and so is the date but the time is one hour in advance. Don't know how to handle this. -Mensaje original- De: Linux on 390 Port [mailto:[EMAIL PROTECTED] En nombre de Goodwin, Derric Enviado el: martes, 20 de marzo de 2007 22:56 Para: LINUX-390@VM.MARIST.EDU Asunto: Re: Timezone change. We patched all of our z/systems and when we rebooted some of them defaulted back to UTC and the time was showing off. I reset them via yast to reflect localtime and everything went well after IPL. The following (DST weekend) I patched all my systems, made sure they were reflecting localtime and now after IPL they are showing up on UTC time, but in yast their are showing up as localtime. Any ideas why some of my guests (across different lpars) boot in UTC even though they show localtime and why some of my guests never had a problem with this and always ipl into the correct hardware clock mode? Anyone else experience this problem? Could it have something to do with VM and how the guest is picking up its time on ipl? Thanks. -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On 3/21/07, Jose Raul Baron [EMAIL PROTECTED] wrote: Yes, I have also date related problems: In Madrid it's now 10'30 local time. But: date mié mar 21 11:30:45 CET 2007 The DOW is correct and so is the date but the time is one hour in advance. Don't know how to handle this. For starters, what does CP say? CP Q TIME tells you z/VM's local time, and CP Q TIMEZONE shows you the definition of the time zone. You may be able to issue the commands from Linux if vmcp is set up right. These two, and your wrist watch, should tell you whether the hardware clock is UTC. Rob -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change. - PJBR
CP Q TIME is TIME IS 19:16:55 UTC WEDNESDAY 03/21/07 I have changed date in z/Linux into Wed Mar 21 19:16:48 CET 2007 Seems to be working fine ... So far... -Mensaje original- De: Linux on 390 Port [mailto:[EMAIL PROTECTED] En nombre de Rob van der Heij Enviado el: miércoles, 21 de marzo de 2007 11:11 Para: LINUX-390@VM.MARIST.EDU Asunto: Re: Timezone change. On 3/21/07, Jose Raul Baron [EMAIL PROTECTED] wrote: Yes, I have also date related problems: In Madrid it's now 10'30 local time. But: date mié mar 21 11:30:45 CET 2007 The DOW is correct and so is the date but the time is one hour in advance. Don't know how to handle this. For starters, what does CP say? CP Q TIME tells you z/VM's local time, and CP Q TIMEZONE shows you the definition of the time zone. You may be able to issue the commands from Linux if vmcp is set up right. These two, and your wrist watch, should tell you whether the hardware clock is UTC. Rob -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On 3/20/07, Goodwin, Derric [EMAIL PROTECTED] wrote: Anyone else experience this problem? Could it have something to do with VM and how the guest is picking up its time on ipl? Linux gets the hardware clock from the machine, which should be UTC. This is not influenced by the timezone you set on z/VM. So all you would need on Linux is the proper /etc/localtime for your local timezone. That should not change upon reboot unless you have managed to set your hardware clock other than UTC. Linux also expects its hardware clock to be UTC. There's an exception for dual-boot PC's that have to deal with that other OS that sets the hardware clock to the current local time. There's a flag in one of the config files that tells whether your hardware clock is UTC or local time. When I looked at this in the past, the hardware clock stuff in SuSE was broken such that it would cause a random offset for your Linux server when you specified the clock was not UTC. But obviously that dual-boot stuff does not apply to System z. Rob -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change. - PJBR
On 3/21/07, Jose Raul Baron [EMAIL PROTECTED] wrote: CP Q TIME is TIME IS 19:16:55 UTC WEDNESDAY 03/21/07 I have changed date in z/Linux into Wed Mar 21 19:16:48 CET 2007 Seems to be working fine ... So far... No, it's not. I expect 19:16 was local time for you, in that case CP should have told you 19:16 CET rather than UTC. Right now you have your hardware clock at UTC+1. And if Linux thinks the hardware clock is UTC then that's one hour off. That will continue to trouble you. Set the clock right at next IPL of z/VM. Then Linux will get the time right as well. Rob -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On 3/2/07, Mark Post [EMAIL PROTECTED] wrote: You could just make sure ntp isn't running, and set your system clock to 01:58 on March 11th, and wait two minutes. Set it back when you know what happens. And may I add that CP SET VTOD is way cool for playing with this. Rob -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Fargusson.Alan wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? man date It can do it. I like the of date -f list -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of John Summerfield Sent: Thursday, March 01, 2007 2:39 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Little, Chris wrote: -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Fargusson.Alan Sent: Thursday, March 01, 2007 11:36 AM To: LINUX-390@VM.MARIST.EDU Subject: Timezone change. * * Note: When you run this program your timezone must be Pacific time. * You might need to do env TZ=PST8PDT dst. */ #include stdio.h #include time.h /* This is the exact time of the switch in 2007 for Pacific time. */ #define BASE 1173607200 Or subtract 3600 for each zone east Whatever that means. Wouldn't it be preferable to compare between local time and UTC for the period in question? On Linux, it's a matter of using date -u: [EMAIL PROTECTED]:~$ date -u;date Thu Mar 1 22:38:00 UTC 2007 Fri Mar 2 07:38:00 WST 2007 [EMAIL PROTECTED]:~$ A shell script to report the difference would be pretty trivial, and not require unlikely tools. I don't install a CD on everything. Do you? -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Back then I ran a script to create a file every second while I crossed the time zone. I was really pleased to find the file system keep the time zone in the time stamp (slide 14 in my presentation). http://rvdheij.nl/Presentations/2005-L76.pdf -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Thu, Mar 01, 2007 at 03:16:08PM -0800, Fargusson.Alan wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? [EMAIL PROTECTED] ~]$ date -d '2007-03-11 03:00:00' Sun Mar 11 03:00:00 CDT 2007 Note, the date '2007-03-11 02:00' doesn't exist in a timezone observing US DST, and date makes note of that: [EMAIL PROTECTED] ~]$ date -d '2007-03-11 02:00:00' date: invalid date `2007-03-11 02:00:00' [EMAIL PROTECTED] ~]$ date -d '2007-03-11 01:59:59' Sun Mar 11 01:59:59 CST 2007 I recommend this over the zdump test, as the ACTUAL system is exercised, rather than dumping the data from a file that may not be used. Finally, remember this is all about timezone display, the actual time in UTC does NOT change! -- Bill Carlson -- Systems Administrator [EMAIL PROTECTED] | Anything is possible, HCIS | given time and money. University of Iowa Hospitals and Clinics | Opinions are mine, not my employer's. | -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Interestingly, on my system (at least the one I tested; SuSE SLES 9 2.6.5-7.283-s390x), I don¹t get the invalid date response: rockhopper:~ # date Fri Mar 2 09:33:13 CST 2007 rockhopper:~ # date -d 2007-03-11 1:59 am Sun Mar 11 01:59:00 CST 2007 rockhopper:~ # date -d 2007-03-12 1:59 am Mon Mar 12 01:59:00 CDT 2007 rockhopper:~ # date -d 2007-03-11 2:01 am Sun Mar 11 03:01:00 CDT 2007 rockhopper:~ # date -d 2007-03-11 2:00 am Sun Mar 11 03:00:00 CDT 2007 It does shift it correctly to the next hour, though. -- .~.Robert P. Nix Mayo Foundation /V\RO-OC-1-13 200 First Street SW / ( ) \ 507-284-0844 Rochester, MN 55905 ^^-^^ - In theory, theory and practice are the same, but in practice, theory and practice are different. From: Bill Carlson [EMAIL PROTECTED] On Thu, Mar 01, 2007 at 03:16:08PM -0800, Fargusson.Alan wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? [EMAIL PROTECTED] ~]$ date -d '2007-03-11 03:00:00' Sun Mar 11 03:00:00 CDT 2007 Note, the date '2007-03-11 02:00' doesn't exist in a timezone observing US DST, and date makes note of that: [EMAIL PROTECTED] ~]$ date -d '2007-03-11 02:00:00' date: invalid date `2007-03-11 02:00:00' [EMAIL PROTECTED] ~]$ date -d '2007-03-11 01:59:59' Sun Mar 11 01:59:59 CST 2007 I recommend this over the zdump test, as the ACTUAL system is exercised, rather than dumping the data from a file that may not be used. Finally, remember this is all about timezone display, the actual time in UTC does NOT change! -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Fri, Mar 02, 2007 at 10:36:24AM -0500, Mark Pace wrote: On 3/2/07, Bill Carlson [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] ~]$ date -d '2007-03-11 03:00:00' Sun Mar 11 03:00:00 CDT 2007 Note, the date '2007-03-11 02:00' doesn't exist in a timezone observing US DST, and date makes note of that: I recommend this over the zdump test, as the ACTUAL system is exercised, rather than dumping the data from a file that may not be used. Odd. Mine doesn't display invalid date. But does display what I would expect if working properly # date -d '2007-03-11 02:00:00' Sun Mar 11 03:00:00 EDT 2007 Your date appears to be 'helpful'. :) Mine: [EMAIL PROTECTED] ~]$ date --version date (GNU coreutils) 6.4 Copyright (C) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License http://www.gnu.org/licenses/gpl.html. There is NO WARRANTY, to the extent permitted by law. -- Bill Carlson -- Systems Administrator [EMAIL PROTECTED] | Anything is possible, HCIS | given time and money. University of Iowa Hospitals and Clinics | Opinions are mine, not my employer's. | -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Fri, Mar 2, 2007 at 10:29 AM, in message [EMAIL PROTECTED], Bill Carlson [EMAIL PROTECTED] wrote: -snip- I recommend this over the zdump test, as the ACTUAL system is exercised, rather than dumping the data from a file that may not be used. Why do you assume that the date command uses a different file than the general system, and hence the date command? Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
I need to test this on a production system. There is no time I could change the clock. One of the not so nice things about the change in DST is that it puts it right in the middle of the time we have the most returns received. -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Mark Post Sent: Thursday, March 01, 2007 9:33 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. On Thu, Mar 1, 2007 at 6:16 PM, in message [EMAIL PROTECTED], Fargusson.Alan [EMAIL PROTECTED] wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? You could just make sure ntp isn't running, and set your system clock to 01:58 on March 11th, and wait two minutes. Set it back when you know what happens. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
This works on my Linux system, but the z/OS Unix system does not support the -d option. I get an invalid date on date -d '2007-03-11 02:00:00. This is SuSE 10, date --version says the version is 6.4. -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of John Summerfield Sent: Friday, March 02, 2007 2:40 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Fargusson.Alan wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? man date It can do it. I like the of date -f list -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of John Summerfield Sent: Thursday, March 01, 2007 2:39 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Little, Chris wrote: -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Fargusson.Alan Sent: Thursday, March 01, 2007 11:36 AM To: LINUX-390@VM.MARIST.EDU Subject: Timezone change. * * Note: When you run this program your timezone must be Pacific time. * You might need to do env TZ=PST8PDT dst. */ #include stdio.h #include time.h /* This is the exact time of the switch in 2007 for Pacific time. */ #define BASE 1173607200 Or subtract 3600 for each zone east Whatever that means. Wouldn't it be preferable to compare between local time and UTC for the period in question? On Linux, it's a matter of using date -u: [EMAIL PROTECTED]:~$ date -u;date Thu Mar 1 22:38:00 UTC 2007 Fri Mar 2 07:38:00 WST 2007 [EMAIL PROTECTED]:~$ A shell script to report the difference would be pretty trivial, and not require unlikely tools. I don't install a CD on everything. Do you? -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
The ls command adjust for local time. On SuSE 10: [EMAIL PROTECTED]:~ env TZ=PST8PDT ls -l args.class -rw-rw-r-- 1 f4185 users 419 Feb 16 03:03 args.class [EMAIL PROTECTED]:~ env TZ=EST5EDT ls -l args.class -rw-rw-r-- 1 f4185 users 419 Feb 16 06:03 args.class [EMAIL PROTECTED]:~ -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Rob van der Heij Sent: Friday, March 02, 2007 3:01 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Back then I ran a script to create a file every second while I crossed the time zone. I was really pleased to find the file system keep the time zone in the time stamp (slide 14 in my presentation). http://rvdheij.nl/Presentations/2005-L76.pdf -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Fri, Mar 2, 2007 at 11:15 AM, in message [EMAIL PROTECTED], Fargusson.Alan [EMAIL PROTECTED] wrote: I need to test this on a production system. There is no time I could change the clock. One of the not so nice things about the change in DST is that it puts it right in the middle of the time we have the most returns received. Ah, I was thinking in terms of a test guest on z/VM. Having one system, and that one in production, is pretty limiting in what you can do. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Fri, Mar 02, 2007 at 09:01:01AM -0700, Mark Post wrote: On Fri, Mar 2, 2007 at 10:29 AM, in message [EMAIL PROTECTED], Bill Carlson [EMAIL PROTECTED] wrote: -snip- I recommend this over the zdump test, as the ACTUAL system is exercised, rather than dumping the data from a file that may not be used. Why do you assume that the date command uses a different file than the general system, and hence the date command? What? Using date in this manner uses the system libraries in the same manner programs should. zdump just lists the info contained in a timezone file. That doesn't mean the system is correctly configured to use that specific timezone information. In a few of the SuSe instances I recently upgraded, some had /etc/localtime as a copy of the timezone file rather than a symlink. Using a verification such as date -d (or write something that uses ctime and friends) is the final Yes, the timezone is correct check. -- Bill Carlson -- Systems Administrator [EMAIL PROTECTED] | Anything is possible, HCIS | given time and money. University of Iowa Hospitals and Clinics | Opinions are mine, not my employer's. | -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Timezone change.
I wrote a little program to test the timezone change. Since there has been
some discussion on the Linux on Z list about this I decided to post it. At the
end is the expected output generated from OpenSUSE 10 on Intel. I also tested
this on z/OS Unix.
/*
* Test the DST change for 2007.
* This program displays the time starting 5 seconds before the switch
* until 5 seconds after the switch.
*
* Note: When you run this program your timezone must be Pacific time.
* You might need to do env TZ=PST8PDT dst.
*/
#include stdio.h
#include time.h
/* This is the exact time of the switch in 2007 for Pacific time. */
#define BASE 1173607200
int main( int argc, char **argv )
{
time_t t;
char *p;
for ( t = BASE - 5; t BASE + 5; t++ ) {
p = ctime( t );
if ( p ) {
fprintf( stdout, %s, p );
} else {
fprintf( stderr, ctime failed\n );
}
}
return 0;
}
[EMAIL PROTECTED]:~/src/misc ./dst
Sun Mar 11 01:59:55 2007
Sun Mar 11 01:59:56 2007
Sun Mar 11 01:59:57 2007
Sun Mar 11 01:59:58 2007
Sun Mar 11 01:59:59 2007
Sun Mar 11 03:00:00 2007
Sun Mar 11 03:00:01 2007
Sun Mar 11 03:00:02 2007
Sun Mar 11 03:00:03 2007
Sun Mar 11 03:00:04 2007
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Re: Timezone change.
-Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Fargusson.Alan Sent: Thursday, March 01, 2007 11:36 AM To: LINUX-390@VM.MARIST.EDU Subject: Timezone change. * * Note: When you run this program your timezone must be Pacific time. * You might need to do env TZ=PST8PDT dst. */ #include stdio.h #include time.h /* This is the exact time of the switch in 2007 for Pacific time. */ #define BASE 1173607200 Or subtract 3600 for each zone east -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
I used. # zdump -v /etc/localtime |grep 2007 /etc/localtime Sun Mar 11 06:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 EST isdst=0 gmtoff=-18000 /etc/localtime Sun Mar 11 07:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 EDT isdst=1 gmtoff=-14400 /etc/localtime Sun Nov 4 05:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 EDT isdst=1 gmtoff=-14400 /etc/localtime Sun Nov 4 06:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 EST isdst=0 gmtoff=-18000 -- Mark Pace Mainline Information Systems -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
Little, Chris wrote: -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Fargusson.Alan Sent: Thursday, March 01, 2007 11:36 AM To: LINUX-390@VM.MARIST.EDU Subject: Timezone change. * * Note: When you run this program your timezone must be Pacific time. * You might need to do env TZ=PST8PDT dst. */ #include stdio.h #include time.h /* This is the exact time of the switch in 2007 for Pacific time. */ #define BASE 1173607200 Or subtract 3600 for each zone east Whatever that means. Wouldn't it be preferable to compare between local time and UTC for the period in question? On Linux, it's a matter of using date -u: [EMAIL PROTECTED]:~$ date -u;date Thu Mar 1 22:38:00 UTC 2007 Fri Mar 2 07:38:00 WST 2007 [EMAIL PROTECTED]:~$ A shell script to report the difference would be pretty trivial, and not require unlikely tools. I don't install a CD on everything. Do you? -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
How do you test today to see that the time change will occur at 2:00 AM on March 11? -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of John Summerfield Sent: Thursday, March 01, 2007 2:39 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Timezone change. Little, Chris wrote: -Original Message- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Fargusson.Alan Sent: Thursday, March 01, 2007 11:36 AM To: LINUX-390@VM.MARIST.EDU Subject: Timezone change. * * Note: When you run this program your timezone must be Pacific time. * You might need to do env TZ=PST8PDT dst. */ #include stdio.h #include time.h /* This is the exact time of the switch in 2007 for Pacific time. */ #define BASE 1173607200 Or subtract 3600 for each zone east Whatever that means. Wouldn't it be preferable to compare between local time and UTC for the period in question? On Linux, it's a matter of using date -u: [EMAIL PROTECTED]:~$ date -u;date Thu Mar 1 22:38:00 UTC 2007 Fri Mar 2 07:38:00 WST 2007 [EMAIL PROTECTED]:~$ A shell script to report the difference would be pretty trivial, and not require unlikely tools. I don't install a CD on everything. Do you? -- Cheers John -- spambait [EMAIL PROTECTED] [EMAIL PROTECTED] Please do not reply off-list -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
Re: Timezone change.
On Thu, Mar 1, 2007 at 6:16 PM, in message [EMAIL PROTECTED], Fargusson.Alan [EMAIL PROTECTED] wrote: How do you test today to see that the time change will occur at 2:00 AM on March 11? You could just make sure ntp isn't running, and set your system clock to 01:58 on March 11th, and wait two minutes. Set it back when you know what happens. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
