Re: perl localtime and gmtime inconsistent on cluster nodes

On Jan 25, 2010, at 6:53 PM, Carl Friedberg wrote:

> Running on OpenVMS (AlphaServer) VMS8.3 with
> patches through July; and perl 5.8.6.
>
> On 2 nodes, gmtime and localtime is an hour
> behind, but correct on the 3rd node.  All of
> the vms time logicals look like this:
>
>  "SYS$TIMEZONE_DAYLIGHT_SAVING" = "0"
>  "SYS$TIMEZONE_DIFFERENTIAL" = "-18000"
>  "SYS$TIMEZONE_NAME" = "EST"
>  "SYS$TIMEZONE_RULE" = "EST5EDT4,M3.2.0/02,M11.1.0/02"
>
> 6.0:friedb$ sysman
> SYSMAN> set e/c
> %SYSMAN-I-ENV, current command environment:
>        Clusterwide on local cluster
>        Username FRIEDBERG    will be used on nonlocal nodes
> ---> vms show time is the same on each node:
> SYSMAN> do show time
> %SYSMAN-I-OUTPUT, command execution on node VMS6
>  25-JAN-2010 19:43:14
> %SYSMAN-I-OUTPUT, command execution on node K
>  25-JAN-2010 19:43:14
> %SYSMAN-I-OUTPUT, command execution on node J
>  25-JAN-2010 19:43:14
>
> --> gmtime is off on VMS6 and K:
>
> SYSMAN> do perl -e "print scalar(gmtime)"
> %SYSMAN-I-OUTPUT, command execution on node VMS6
> Mon Jan 25 23:43:22 2010
> %SYSMAN-I-OUTPUT, command execution on node K
> Mon Jan 25 23:43:22 2010
> %SYSMAN-I-OUTPUT, command execution on node J
> Tue Jan 26 00:43:22 2010
>
> --> localtime is off on VMS6 and K:
>
> SYSMAN> do perl -e "print scalar(localtime)"
> %SYSMAN-I-OUTPUT, command execution on node VMS6
> Mon Jan 25 18:43:27 2010
> %SYSMAN-I-OUTPUT, command execution on node K
> Mon Jan 25 18:43:27 2010
> %SYSMAN-I-OUTPUT, command execution on node J
> Mon Jan 25 19:43:27 2010
> SYSMAN>  Exit
> 6.0:friedb$ perl -v
>
> This is perl, v5.8.6 built for VMS_AXP


It's hard to say with any certainty whether this is Perl or the CRTL  
or other configuration gotchas.  5.8.6 is about 6 years old and 5.10.1  
is current, so even if this is Perl's fault, it's not going to get  
fixed unless the same thing happens against something much more recent.

Not sure it will reveal anything the logical names above don't, but  
you can try:

$ @SYS$MANAGER:UTC$TIME_SETUP SHOW

________________________________________
Craig A. Berry
mailto:[email protected]

"... getting out of a sonnet is much more
  difficult than getting in."
                  Brad Leithauser