[mythtv-users] rebalance deleted recordings
warpme at o2.pl
Thu Mar 20 18:38:27 UTC 2014
On 20/03/14 19:09, Michael T. Dean wrote:
> On 03/20/2014 01:52 PM, Warpme wrote:
>> I had this king of problem when I added new 4T HDD (/myth/tv1) to my
>> default recording storage group.
>> Before addition, this SG had single, 3T dir. (/myth/tv) full of
>> I add 4T HDD and added /myth/tv1 dir to SG.
>> After sometime I started experience deletion of non-expirable
>> recordings. Investigation shows me that it is because /myth/tv has
>> 100% non-expirable recordings. Despite that, myth schedules storage
>> rec. to /myth/tv/ so some non-expirable rec. had be deleted to make
>> room for new recordings.
> MythTV will never automatically delete any non-expirable recording
> that's not already been Deleted interactively by the user (i.e. the
> user deleted it to the Deleted recording group).
Well - so there is probably kind of bug in 0.27-fixes.
I remember clearly: at 7:40PM we sit to watch 7PM 30min news - and there
wasn't recording to watch. Initially I was thinking that tuner/recorder
fails to record. What surprise was when in BE log I saw 7PM news
autoexpired, but other, few days old expirable shows, are still not
expired. Looking in details show me that expirerer expire 7PM news
because at 7:15PM another rec. started. Common thing was that 7PM news &
7:15PM rec. was on the same /myth/tv member of SG. I looked on /myth/tv
and discover it is:
100% full and size of non-expirable rec on /myth/tv is 100% of size of
As proof-of-concept, I moved some non-expirable rec. from /myth/tv to
/myth/tv1 - and problem away...
>> This is IMHO result deficiency of myth SG scheduler (as I think it
>> not takes into account expirable rec.size) .
>> Solution was to re-balance occupancy of expirable recordings between
>> on all members of SG (target is to have equal amount of expirable
>> rec. on each member of SG).
>> Now, after 6 months I see creeping out-of-balance, so after some time
>> I'll have to repeat balancing process
> FWIW, you don't need to rebalance if you have "lots" of free space (as
> compared to the amount of space your "near term" recordings will take)
> available on all file systems. You only really need to balance when
> some file systems--but not all--begin to fill. (Though if all fill,
> you'll want to balance Live TV/Deleted/Watched recordings or
> pre-expire/manually delete from Deleted some recordings to make some
> free space.)
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