[mythtvnz] Pixellation Every ~ 20 minutes

[Curtis Walker]

On 6 October 2012 13:38, Paulgir <paulgir at gmail.com> wrote:
> On Fri, 05 Oct 2012 23:20:41 +1300, Steve Hodge <stevehodge at gmail.com>
> wrote:
>
> On Fri, Oct 5, 2012 at 9:52 PM, Stephen Worthington
> <stephen_agent at jsw.gen.nz> wrote:
>>
>> Yes, that was the problem.  Ext filesystems have a horrible delete
>> process that practically locks up the drive until it completes.  It is
>> only usually a problem with larger files, but that includes almost all
>> video/recording files.  It also happens when a large log file is
>> deleted, which happens from cron jobs.  There is no workaround - you
>> have to use a different filesystem.
>
>
> There is a workaround and the slow deletes option is it. Instead of deleting
> a recording in a single operation it progressively truncates the recording
> to smaller and smaller sizes before finally deleting it. This avoids the
> issue as fewer file blocks are unlinked in each operation.
>
>>
>> If there are multiple deletions
>> coming from MythTV, there is an option somewhere for "slow deletes" or
>> something like that, which I think prevents back-to-back deletes from
>> making the problem even worse.
>
>
> No, it's got nothing to do with multiple deletes.
>
> Deletes don't seem to be the problem here though.
>
> Cheers,
> Steve
>
>
>
>
> Sorry that should read: "At around 22:55:00 till 22:57:24 the recording
> exihibits the pixellation".
>
> _______________________________________________
> mythtvnz mailing list
> mythtvnz at lists.linuxnut.co.nz
> http://lists.ourshack.com/mailman/listinfo/mythtvnz
> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>

Nope - XFS doesn't resolve the situation. Exact same pixellation at
the 20 minute mark in one program and 29 minute mark in the next
program. In a way this is good - it means I don't have to go and buy a
UPS to protect XFS/JFS.

Will have to find where 0.26 sends its logfiles ....