[Vms.sig-hu] Announcment from OpenVMS Engineering - Daylight Saving Time changes - OK for External (fwd)
Fodor Zsuzsa
fodor31 at freemail.hu
2006. Nov. 27., H, 07:34:35 CET
---------- Továbbított levél ----------
Dátum: Tue, 21 Nov 2006 11:04:17 -0500
Feladó: Skonetski, Susan <susan.skonetski at hp.com>
Címzett: Skonetski, Susan <susan.skonetski at hp.com>
Tárgy: Announcment from OpenVMS Engineering - Daylight Saving Time
changes - OK for External
Dear Distribution Lists,
The following announcement is from the OpenVMS Engineering group
and is
also available on the VMS web site at:
http://h71000.www7.hp.com/dst.html.
If you need a better looking copy of this message please let me know
since I converted this to plain text. The attachment is the text at the
bottom of the message. Thanks to Sue Avery for forwarding.
Warm Regards
Sue
------------------------------------------------------------------------
------------------------------------------------------------------------
-----------
HP OpenVMS Systems
Daylight Saving Time changes
Upcoming changes to Daylight Saving Time in the U.S.
The Energy Policy Act of 2005 will change the start and end times for
Daylight Saving Time (DST) in the U.S. starting in 2007. Beginning in
2007, DST starts on the second Sunday in March (instead of the current
first Sunday in April). DST ends on the first Sunday in November
(instead of the current last Sunday in October). In addition, there are
a number of counties in Indiana that have changed in 2006 from the
Eastern U.S. time zone to the Central U.S. time zone.
To meet this need, HP has included the latest Time Zone information (as
of March 2006 tzdata2005m) for the world in OpenVMS version 8.3.
These
time-zone changes have also been backported to the prior versions
with
the automated DST change:
* OpenVMS VAX version 6.2. The backport kit is named
VAXTZ01_062.A-DCX_VAXEXE (See note below.)
* OpenVMS VAX version 7.3. The backport kit is named
VAXTZ01_073.
(See note below.)
* OpenVMS Alpha version 6.2. The backport kit is named
ALPTZ01_062.A-DCX_AXPEXE (See note below.)
* OpenVMS Alpha version 7.3-2. The backport kit is named
VMS732_TZ-V0200.
* OpenVMS Alpha version 8.2. The backport kit is named
VMS82A_TZ-V0100.
* OpenVMS for HP Integrity servers version 8.2. The backport
kit
is named VMS82I_TZ-V0100.
* OpenVMS for HP Integrity servers version 8.2-1. The backport
kit
is named VMS821I_TZ-V0100.
All of the patch kits listed above are available from the HP IT Resource
Center (ITRC) website: http://www1.itrc.hp.com/
NOTE: Kits VAXTZ01_062.A-DCX_VAXEXE, VAXTZ01_073, and
ALPTZ01_062.A-DCX_AXPEXE should not be installed before January 01,
2007. If installed before that date, each of these kits will display a
warning message advising the user to install the kit on or after January
01, 2007, and the kit installation will exit without installing the
patch.
VMS version 5.5-2 requires that you modify the system time manually.
For
more information, please refer to the VMS version 5.5-2 instructions
There are other methods for setting the time on systems in addition to
the automated change. Starting with OpenVMS version 7.3-1, in
SYS$MANAGER there is a function UTC$TIME_SETUP that works with the
time-zone files and allows system managers to set the system time and
time zone. Additional information is available in the SYS$EXAMPLES file
DAYLIGHT_SAVINGS.COM for making manual time change adjustments.
----------------------------------------
How To Adjust VMS 5.5-2 System Time For Daylight-Savings
(Forward/Backward)
------------------------------------------------------------------------
---
OVERVIEW:
VMS 5.5-2 does not automatically know when daylight savings begins or
ends; you must adjust the time as described in this article.
You can also change the time on an HSC with the command:
SETSHO> SET DATE
Follow these steps to change the time on a VMS version 5.5-2 system:
1. Enable privileges
2. Stop processes as indicated below
3. Set the time
4. Restart processes
The following discussion applies to all VMS 5.5-2 systems, whether in a
VAXcluster or not.
BACKGROUND:
Some layered products and VMS components use the system time to
sort
records and schedule events. These include, but are not limited to,
DECnet, the DECperformance Solution product set (DECps), VAX
Software
Performance Monitor (SPM) and VAX Performance Advisor (VPA). Also
affected by system time changes are those systems running the VAX
Distributed Name Service (DNS) and the Digital Distributed Time Service
(DECdts).
To check if a particular software application is time-dependent and
therefore should be stopped before you change the time, refer to the
documentation for that application.
The commands for stopping and restarting DECps, SPM, and VPA are
included in this article. A separate article titled "[DECdns] Changing
System Time On DNS Server Systems" discusses changing system time
on DNS
server systems. That article can be found in the DNS database.
Systems running the Digital Distributed Time Service (DECdts), part of
DECnet-VAX Extensions, should use DECdts to change the time. You
cannot
use the DCL "SET TIME" command on a system running DECdts
because DECdts
disables this command and its system services. If this is attempted,
you receive the following errors:
%SET-E-NOTSET, error modifying time
-SYSTEM-F-IVSSRQ, invalid system service request
Please refer to the separate article in the VMS database entitled "
"SYSTEM-F-IVSSRQ" Error From DCL "SET TIME" Command" for
information
about these errors and how to correctly set the time with DECdts.
These products should be stopped even if they are not actively
collecting when you plan to change the time. For example, you may
have
scheduled VPA data collections only for Monday through Friday, so it
would be inactive when you change time over the weekend. However,
the
data collector still checks periodically whether it should begin its
data collections.
Print and batch jobs submitted with /AFTER=time will be delayed an
hour
if you set the time back. If you set the time forward, for example from
2:00 to 3:00, all jobs with start times in that range will print or
execute.
If you want to set the time forward, you do not need to stop the
processes indicated below. Verify your process privileges, and then set
the time.
If you want to set the time back, verify your privileges, stop the
processes, and then set the time. Remember to restart the processes
after the time is set.
PREPARATION:
1. Your process must have both OPER and LOG_IO privileges to use
the
SET TIME command. To check the
privileges for your process, use the command:
$ SHOW PROCESS/PRIVILEGE
If your process does not have these privileges but does have
SETPRV
privileges, enable the
privileges with the command:
$ SET PROCESS/PRIVILEGE=(OPER,LOG_IO)
2. Stop SPM with the command:
$ PERFORMANCE COLLECT=CAPACITY/STOP (node1,node2,...)
or
$ PERFORMANCE COLLECT=TUNE/STOP (node1,node2,...)
You can stop collections on all nodes from any one node in the
VAXcluster with the above command
or remove the node specifications and use the command from
SYSMAN
with ENVIRONMENT
set to CLUSTER.
3. Stop VPA with the command:
$ ADVISE/COLLECT/STOP
You must issue this command on each node in the VAXcluster which
is
running VPA, or you can use
SYSMAN with ENVIRONMENT set to CLUSTER.
4. Stop the DECps data collector with the command:
$ ADVISE COLLECT STOP/WAIT
You must issue this command on each node in the VAXcluster which
is
running the DECps Data
Collector, or you can use SYSMAN with ENVIRONMENT set to
CLUSTER.
If you have other time-
dependent applications on your system, you should stop them also.
NOTE: Some applications, such as Accounting and the Error Log, are
not immediately affected by
the time change. They will still run, but the times recorded may
result in inaccurate records.
For example, if you set the time back, a user may have an
Accounting record with a logout time
earlier than the login time.
You are now ready to reset the time.
PROCEDURE:
First, reset the time. Follow the instructions indicated for your type
of system configuration. The formats for date and time are documented
in
the "VMS DCL Concepts Manual".
o Non-clustered system:
1. Change the time with the two commands:
$ SET TIME=hh:nn:ss.cc
If you need to change the date as well as the time, you can
include that information in the same command:
$ SET TIME=dd-mmm-yyyy:hh:nn:ss.cc
2. Restart processes as indicated below.
o VAXcluster:
1. Use the SYSMAN Utility to set the time for all nodes. Issue
the following command from any one cluster node:
$ RUN SYS$SYSTEM:SYSMAN
SYSMAN> SET ENVIRONMENT/CLUSTER
SYSMAN> SET PROFILE/PRIVILEGE=(LOG_IO,SYSLCK)
SYSMAN> CONFIGURATION SET TIME hh:mm:ss.cc
SYSMAN> EXIT
2. Restart processes as indicated below.
RESTART PROCESSES:
1. Restart SPM:
$ PERFORMANCE COLLECT=CAPACITY/START (node1,node2,...)
or
$ PERFORMANCE COLLECT=TUNE/START (node1,node2,...)
You can issue one command to start SPM on all nodes with the
above
command or eliminate the node
specification and issue the command from SYSMAN with
ENVIRONMENT
set to CLUSTER.
2. Restart VPA:
$ ADVISE/COLLECT/START
You must start VPA from each node in the VAXcluster, or issue the
command from SYSMAN with
ENVIRONMENT set to CLUSTER.
3. Restart the DECps Data Collector:
$ ADVISE COLLECT START
You must start the DECps Data Collector from each node in the
VAXcluster, or issue the command
from SYSMAN with ENVIRONMENT set to CLUSTER.
4. Restart any other applications.
REFERENCES:
For additional information, please refer to the: VAX/VMS Internals and
Data Structures Manual, the VMS DCL Concepts Manual, the VMS DCL
Dictionary, the VMS SYSMAN Utility Manual, DECnet-VAX: DECdts
Management, the VAX SPM Reference Manual, and the VAX Performance
Advisor User's Guide.
___________________________________________________________
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