Re: [Scst-devel] ISCSI volume performance on windows

[<wa...@to...>]

Richard,

Thank you very much for you reply, I'm clear now.

Best Wishes,
Daobang Wang




发件人： Richard Sharpe 
发送时间： 2011-03-23  00:24:10 
收件人： wa...@to... 
抄送： scst-devel 
主题： Re: Re: Re: [Scst-devel] ISCSI volume performance on windows 
 
On Mon, Mar 21, 2011 at 8:38 PM, wa...@to...
<wa...@to...> wrote:
> Hi, Richard
>
>      Is the FileIO will write the data to file system, that means will be
> stored in memory firstly, right?
> If it is, will the performance become down after the memory is used out,
> right?
At some point you have to pay the penalty of going to disk. If you are
trying to achieve sustained sequential read or write then you will be
limited by what your storage subsystem can achieve. If you are trying
to achieve sustained random read or write it is even worse, generally.
The page cache is there to smooth over the bursty nature of many IO workloads.
-- 
Regards,
Richard Sharpe