[mythtv] Questions on #6138 (HDHomeRun multirec)

Yeechang Lee ylee at pobox.com
Wed Feb 4 12:47:51 UTC 2009

Bill Cizek <cizek at rcn.com> says:
> Let me know how it works.

Running it now. It will be hard for me to do a lot of truly-live
testing because I almost never record anything from the (SD)
multiplexed OTA channels I have available. I've scheduled all of my
now-six tuners (four multirec OTA, two cable) at once during tomorrow
afternoon, though.

Two questions:

* I've many times before recorded from all four physical tuners at
  once, and usually the two OTA tuners are set to non-multiplexed
  channels. My understanding is that theoretically, from a disk- and
  network-usage standpoint, recording from my now six tuners should be
  no more stressful than what I've already been doing (except some
  extra load on the MySQL server from laying down six seektables
  instead of four). Is this correct?

* Something odd I noticed when scheduling the six simultaneous
  recordings is that, when changing an existing recording rule's
  setting (Single Record->Find One, Single Record->None, etc.) on an
  OTA channel, it does not "apply" until I perform a second action,
  either on the same rule or elsewhere.

  For example, I create Single Record rules on simultaneous programs
  on channels A, B, and C. I then turn rules A, B, and C off in that
  order; all three remain unchanged.. I then again turn A and C off in
  that order; A and C duly disappear with B remaining unchanged,
  proving that it indeed is not a case of the database just being slow
  to respond to the rule changes. I did not see such behavior before
  applying your patch and again, this behavior only appears for OTA
  channels. ('mythbackend --resched' doesn't force the rule changes to
  apply, either.)

Frontend/backend:	P4 3.0GHz, 1.5TB software RAID 5 array
Backend:		Quad-core Xeon 1.6GHz, 6.6TB sw RAID 6
Video inputs:		Four high-definition over FireWire/OTA
Accessories:		47" 1080p LCD, 5.1 digital, and MX-600

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