[mythtv-users] Howto prevent MythTV flushing/Syncing disk writes (LiveTV/Recordings)

[Albert Graham]

Jeffrey Borg wrote:
> Albert Graham wrote:
>   
>>>   
>>>     
>>>       
>> Ah, It's understandable that "playback" could get interrupted - because 
>> as far as I remember,
>> by default writes get priority over reads (this a configurable /proc 
>> option in Linux), I interpreted
>>  "video skipping" as failed capturing - which is different from frontend 
>> playback, my apologies :).
>>
>>   
>>     
> Try
> blockdev --setra 4096 /dev/name
>
> where 4096 is 4mb. this is a read ahead value.
>
> I think my problem at times might just be the 100mbit network now. With 
> 3 remote front ends. The back end is my desktop pc.
>
> Also I rather let mythtv write often. I have already had 600gb of 
> recordings end up in lost+found. I only managed to get the names back 
> after I noticed the file sizes in the database.
>
>   

Hi Jeff,

My laptop (frontend) has 1000MB/s and I already use blockdev @16384 
(8MB) at teh backend, interestingly the laptop can read from the backend 
@ 85MB/s - (over UDP NFS) which is about 100% faster than reading from 
its local drives :)


Albert.