[mythtv-users] live tv issues
brett at inngineering.com
Thu May 3 01:22:50 UTC 2007
> Brett Stevens wrote:
>> Hi guys, I have an interesting issue that I cannot seem to find an
>> I have two systems both of which can run a single system myth setup with
>> absolutely no problems. Both have been rebuilt over and over to get this
>> The problem is when I split them up so as to run a master backend and
>> frontend on one and a standard backend / frontend on the other. They are
>> connected with intel e1000 nics connected to a 100mbs switch. The
>> as plenty of capacity to handle many video streams including multiple
>> mpeg2 streams. The server hd access is via raid5 lvm on new 250gb sata
>> All in all I would have to say that capacity access and network is all
>> however when I change the system over to the distributed model live tv
>> breaks down becomes very blocky and seems to drop large numbers of
>> Ive posted this to the lists before and always assumed that it was my
>> version of myth my hardware etc. Ive now upgraded my hardware and myth
>> versions to the latest to no avail.
> Looks like the mpeg is damaged in some way (but you knew that).
> The first thing I'd do is to prove out the network. The hardware specs
> indicate it *should* be up to the task, but is it really performing as
> it should be?
> I'd try some test transfers outside of Myth, perhaps bonnie on an
> nfs-mounted filesystem as well.
> Does ifconfig show any errors? Do you perhaps have interrupt conflicts
> on the NICs?
> I've read someplace about 100 speed switches, especially consumer grade
> ones, having trouble with GB NICS and stacks, I'll try and find that
> info if I can.
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> mythtv-users at mythtv.org
Bonnie output from the nfs share is
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec
1024 9003 26.2 9683 10.5 5290 0.5 11224 10.6 1565038 101.5
seems ok to me but I could be wrong.
ifconfig shows 0 errors and 0 collisions on both systems
I think the problem may be deeper but Im not sure where to look now.
As I mentioned in an erlier post. Now if I was to revert back to a single
system setup the problem will still occur, Also the problem still occurs
if I set the recordings dir to a local dir. I feel fairly strongly that it
is not a resource issue.
thanks for the assistance Im completely stumped if someone can pointy me
at some further areas to look that would be great....
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