Linux RAID & XFS Question - Multiple levels of concurrency = faster I/O on md/RAID 5?

[Justin Piszcz]

On Sat, 1 Nov 2008, John Robinson wrote:

> On 01/11/2008 08:29, Justin Piszcz wrote:
> [...]
>> Why is running 3 jobs con-currently that take care of two parts each more 
>> than
>> twice as fast than running one job for six parts?
>
> Because you have multiple CPUs?

So 1/4 of a quad core q6600 cannot achieve higher rates of I/O due to the
parity operations being that costly?

Is the only way to increase the single-threaded speed to increase the maximum
CPU core speed/get a faster CPU, and/or theoretically a multi-threaded md-raid
could maximize throughput?

Justin.