[OpenIndiana-discuss] How to configure OI for proper daylight savings adjustments.

[Robin Axelsson]

My suspicions have been that there are several applications that manages
the DST, hence the dual hour shifting, but I have been unsure as to
which applications are involved with this in OI. It's difficult to test
these things as they only occur twice a year.

My system is dual/multiboot and it also runs VMs through VirtualBox on
the OpenIndiana partition. I think my "ghost" is either the dual boot,
(i.e. the OS on the other partition decides to shift the time for DST as
well), or the VMs.

It seems that changing system time from within VMs also affect the
system time of the host. I'm not entirely sure whether this is the case
but I strongly suspect so and I will try it out when I get around to it.
Strangely enough, DST management issues with guests are not addressed in
the VirtualBox documentation. I'm not sure about KVM and Xen/xVM...

The route to go is to disable automatic DST adjustments on all systems
but one. Not entirely sure how this is done in OI. It would be desirable
to let the time zone be proper (and not set an arbitrary time-zone where
DST does not apply just to disable DST).

- Robin.

On 2013-04-01 16:17, Jim Klimov wrote:
> On 2013-04-01 13:07, Hans J. Albertsson wrote:
>> Jim,
>> Excellent attitude..
>> However:
>> That is not how OI Live DVD install sets things up, and I'm a bit
>> surprised about your implicit statemet that rtc -c will shift the PC
>> realtime clock at DST shift times... Is that true? Does rtc actually
>> shift the MB RT clock??
>>
>> That is SICK and WEIRD behaviour.
>
> I believe it does (shift the clock) and is (bad, especially for
> dual-boot systems each of which shifts the clock after DST switch
> day), so for over a decade I set up systems (including many of
> Windows servers I come by) to run in UTC and can't really well
> comment about behavior of systems configured otherwise.
>
> I think "rtc -c" does change the PC clock, and I think we've had
> a Solaris customer with weird failures due to this, but I can't
> now recall what the problem (inconvenient symptom) was. Fixing
> the RTC setup did take care of that, though.
>
> Just think of running a server available (interactively) for users
> from almost a dozen of timezones that Russia spanned, and think
> what other timezone than common UTC would make sense as a default
> one for a low-level? ;)
>
> //Jim
>
>
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