[mythtv-users] Migrating recordings to a NAS

William william_munson at comcast.net
Sun Oct 11 14:09:53 UTC 2009

Michael T. Dean wrote:
> On 10/11/2009 07:22 AM, William wrote:
>> Not quite true. It will only delete files to make more room if its 
>> actually recording something. If not, you will run out of room. The 
>> thread only runs when something is recording.
> It runs all the time, it only deletes when more room is needed for 
> recording stuff.
>> This is a sucky feature of myth.
> IMHO, MythTV's deleting recordings when it doesn't need to delete them 
> would be a sucky feature.  If you had told Myth to keep 5GB free and 
> you needed to temporarily copy a 4GB file to the Myth box, do you 
> /really/ want Myth to delete 4+GB of recordings before you delete the 
> 4GB file?
yes, absolutely. (Files sent to the NAS will be there a while as the NAS 
only contains videos. Local storage is for temp files.)  Because if it 
did, I would set the free space to 1 gig assuming that the response time 
to running out of space is fairly quick. A scan every 15 seconds would 
be enough.  I can copy a 4 gig file in less than 1 minute. However my 
typical problem occurs when downloading videos from various sources so I 
only get ~1 MB/sec of writing to the drives. (The downloading software 
is running on the NAS server.) In that case, a check every few minutes 
would be fine. I would also be happy with an external script that would 
simply scan the database and delete the oldest expirable recording and 
update the database when triggered by a low space condition. I am 
tempted to write one for myself, controlled by monit, just need to 
figure out the complicated sql commands need to properly delete a 
recording and remove all data from the database. The only unknown for me 
is: Will the distro I am using allow me to save a 4 gig file to a drive 
that only has 1 gig reported as free. I doubt it so I would still have 
to maintain a free space greater than the largest file I would expect to 
transfer (10GB).


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