[Stgt-devel] Re: [Iscsitarget-devel] write performance examples ?

[FUJITA Tomonori]

From: "ming.zhang.china at gmail.com" <ming.zhang.china at gmail.com>
Subject: Re: [Stgt-devel] Re: [Iscsitarget-devel] write performance	examples ?
Date: Mon, 17 Apr 2006 09:40:29 -0400

> On Mon, 2006-04-17 at 13:55 +0900, FUJITA Tomonori wrote:
> > From: "ming.zhang.china at gmail.com" <ming.zhang.china at gmail.com>
> > Subject: Re: [Iscsitarget-devel] write performance examples ?
> > Date: Sun, 16 Apr 2006 21:44:55 -0400
> > 
> > > btw, stgt can directly work on page cache because it uses mmap
> > > interface?
> > 
> > Yes and No. As I said, Ardis can also directly work on page cache
> > without using mmap.
> > 
> > stgt performs I/O operations in user space unlike the
> > others. Comparing it with the others does not make sense. You need to
> > read IET/Ardis/stgt code to understand the details.
> 
> from users point of view, both stgt and iet provide a networked storage
> service (stgt can provide more). just like people can compare NFS,
> SAMBA, FTP performance with same HW, and choose the best one base on
> feature and performance, why people can not compare same protocol and
> different implementation solutions?

Of course, you can compare the performances by running them. But you
cannot compare (or understand) the designs with simple sentences such
as 'stgt can directly work on page cache because it uses mmap
interface?'.


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