[mythtv-users] Changing System Time

[Joseph A. Caputo]

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org]On Behalf Of Ray Olszewski
> Sent: Wednesday, August 06, 2003 12:20 PM
> To: mythtv-users at mythtv.org
> Subject: RE: [mythtv-users] Changing System Time
>
>
> At 10:45 AM 8/6/2003 -0400, Joseph A. Caputo wrote:
> [...]
> >There are two issues here... one is the underlying protocol, the other is
> >the Myth software.  Sometimes, if you adjust the system time, a
> >connection-based protocol like TCP/IP could think the connection
> has timed
> >out.  The other issue is Myth itself, if it keeps track of network
> >communications with any kind of heartbeat or timer, it can get confused.
> >And, as Isaac said, playback (and probably recording, too) is highly
> >time-sensitive.
>
> This *seems* to imply that an automated ntp-based time adjustment could
> cause Myth to hang. Am I reading this right? How big a time correction
> *can* Myth survive?

If NTP runs frequently enough, the adjustment should be small enough not to
perturb anything.  If you run it infrequently *and* your system clock has
alot of drift, then I imagine the effect would be the same as a manual
adjustment -- if a manual adjustment of a certain amount of time causes
problems, so will NTP.

-JAC