[mythtv-users] Network affecting standalone mbe/fe?

Clay ctmythtv at pacbell.net
Tue Aug 30 04:03:00 UTC 2011

Michael T. Dean wrote:
> On 08/28/2011 09:22 PM, Robert McNamara wrote:
>> On Sun, Aug 28, 2011 at 6:15 PM, Richard Morton wrote:
>>> Try hostname.local
>>> If your backend is called server then it is server.local this is if you
>>> don't have it connected to a domain.
>> Bear in mind that using hostnames in for the backend IP values MythTV
>> is not supported and will cause breakage.  Stuart Morgan added code in
>> master that detects when Myth is attempting to a local interface, and
>> uses the loopback, which will avoid exactly the issue being seen here.
>>   The code will not be backported, but will be present in .25.
> Note, however, that using hostnames and/or localhost for the DB Host 
> Name (and /only/ the DB Host Name) is fine, even in a mutli-host MythTV 
> setup.
> I specifically set up my master backend (the host that also runs mysqld) 
> config.xml/mysql.txt to use DBHostName of localhost, because a) it will 
> always resolve, b) it will allow Qt-MySQL drivers to choose to use the 
> significantly-faster Unix-socket-based connections (rather than TCP/IP 
> connections), and c) it is completely independent of the network--even 
> on a distro whose utilities detect a network's going up or down and 
> ripping the IP address out from under every app on the system.
> On my remote backend and remote frontend systems, I use the (static) IP 
> address of the master backend host for DBHostName because a) if the 
> network goes down, it will lose connection to the database, anyway, b) 
> using IP address specifically means that if name resolution/DNS goes 
> down on my network, it won't have any effect on MythTV/Qt-MySQL's 
> ability to use the database.
> That said, all master/this backend "IP Address" settings /must/ use 
> (static) IP addresses.  Using host names will cause issues, as Robert 
> mentioned.  (So, in short, the only place you can use a host name--but 
> shouldn't, other than localhost--is config.xml/mysql.txt's DBHostName 
> setting.)
> Mike
> ______

Thanks Mike. I'm going to have a go at setting the DBHostName.

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