[mythtv-users] Wake up disks on events

[John Drescher]

On Thu, Sep 11, 2008 at 4:30 PM, Brad DerManouelian
<myth at dermanouelian.com> wrote:
> On Sep 11, 2008, at 11:09 AM, David Brodbeck wrote:
>
>> Brad DerManouelian wrote:
>>> That's a terrible idea. Flash drives can't keep up with the read/
>>> write
>>> demands of a database application in terms of speed or longevity.
>>> Don't do that.
>>
>> I'm not convinced that's true, but admittedly I haven't tried it in
>> this
>>  particular application.
>>
>> For databases it's often the seek speed that matters, not so much the
>> data rate.  Flash drives have excellent seek speed.
>
> Often, yes. Specifically, not in this case.
> Hint: Look at write activity in MySQL while recording a program.
> Specifically, look at the seektables.
>

If I were interested in using flash for my database I would use the
kernel parameters to delay the writes as long as it would let me so
that it would lessen this effect. Or possibly use laptop mode.

John