Re: [Aoetools-discuss] High performance AoE

[Kenneth K. <ken...@gm...>]

On Fri, Feb 18, 2011 at 9:14 PM, Tracy Reed <tr...@ul...> wrote:
> On Fri, Feb 18, 2011 at 03:27:35PM +0100, Adi Kriegisch spake thusly:
>> vblade kind of a reference implementation. Starting multiple vblade
>> processes will not help either because it will just eat up available iops
>> be introducing unnecessary, uncoordinated reads and writes. When talking
>
> Wouldn't the block layer aggregate and coordinate these reads and writes?
> vblade is just reading/writing from a file like any other process, no?  I find
> vblade performance to be pretty decent. Especially since the "thundering herd"
> problem of all vblade processes being awakened by every packet was solved. I am
> never limited by CPU and very rarely even network, only by disk performance
> itself.

I agree with Tracy here, although some tweaking of the kernel might
help for optimal access to the underlying block devices. However, this
is shooting off the hip and I think tests are in order to put this one
to rest.

-- 
Kenneth Kalmer
ken...@gm...
http://opensourcery.co.za
@kennethkalmer