[mythtv-users] recording drive bottle neck suggestions..

[John Drescher]

On Mon, Aug 31, 2009 at 5:49 PM,
sonofzev at iinet.net.au<sonofzev at iinet.net.au> wrote:
>
>
> On Tue Sep  1  4:50 , Yeechang Lee  sent:
>
>>sonofzev at iinet.net.au sonofzev at iinet.net.au> says:
>>> On Sunday night I ended up having a bottle neck as it was the first
>>> time I ever had 5 recordings going at one (1 HD 4 SD)...
>>
>>Here's how I answered a similar question a few months back:
>>
>>http://www.gossamer-threads.com/lists/mythtv/users/369400#369400>
>>(read the whole thread)
>>
>>--
> Thanks to everyone who has responded to this.. I think I know what to do. but to
> answer a couple of questions
> 1. DVB-T tuners (1x dvico fusion lite.. 1 x dual express.. 3 tuners on 2 cards)
> 2. DB is on OS drive while recording is elsewhere....
>
> BTW .. commflagging was definitely occuring as looking at the schedule there were
> numerous shows starting and finishing .....
>
> My strategy will be
>
> Immediately
> 1. schedule all jobs to after 1am ... there is very little recording happening
> then... (i assume this includes commflagging when a window for jobs is set?)
>
> When I get a chance to migrate cases..
>
> 2.  add another 1 recording drive .. to start (I have a spare 200GB IDE )
>
> 3. load test -- see what the limits are..
>
> depending on load test I may add another drive for recording or add another drive
> to the RAID for general storage...
>
> thanks again everyone. it's probably a few weeks before I get time to do this...
> but will post my results
>

One linux software RAID optimization you can do is discussed in this
thread (look at the second post):

http://forums.gentoo.org/viewtopic-t-673067-highlight-raid5.html

John