Re: [Xen-users] TAP:AIO much slower then file: ?!

[MS <ms@xxxxxxxxxx>]

Tastsite 440M needs over a hour with tap:aio:
If i use some more i have to wait .... to christmas :)
With file: the 440M need less then 3 minutes.

I know, 440M is not a good value, but it never can be less then 1% of 
the performance before changeing.
Javier Guerra schrieb:
> On Thu, Jul 31, 2008 at 8:17 AM, MS <ms@xxxxxxxxxx> wrote:
>   
> > Hi!
> >
> > i checked the io performance with bonnie++ on an domU.
> > With "file:" i get a goot result (nearly the dom0 results):
> >     
> that "440M" is the test size? if so, it sounds too small.  it should
> at least be twice (5-10x is better) the size of cache available.
> remember, "file:" devices might be cached by the Dom0, "tap:" won't.
> with small files it's common to see this pattern on most tests, but
> won't benefit most real world uses.
>
>
>   

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