Re: [bug-myserver] task #9307: Propose to improve GNU MyServer Throughput and Reliability

[Alexandru IANCU]

On Tue, 2009-04-14 at 15:05 +0200, Giuseppe Scrivano wrote:
> Alexandru Iancu <address@hidden> writes:
> 
> > I hope it may use this because it&#39;s really nice feature, unfortunately 
> > I tried it yesterday 
> > evening with default parameters and it didn&#39;t worked. There are about 
> > 20 SCTP options 
> > so maybe it&#39;ll work with little bit of tuning ... neither did I looked 
> > into kernel sources 
> > to have a hint about what option to use to make it work. Actually I never 
> > did this ... 
> 
> The problem is that sendfile needs a file descriptor to use a the
> destination socket.  I don't know if it is possible to use a different
> descriptor for a specific stream in the SCTP connection.

Of course,
anyway I review the code I wrote and there were many other bugs(starting
with wrong lksctp version for my kernel).

> 
> 
> > Unlike HTTP, FTP transfers also big files so the spec. requires the server 
> > to cancel ongoing 
> > download/upload. I don&#39;t know how to stop a sendfile API? May I 
> > register a callback that OS 
> > checks from time to time to stop a sending file?
> 
> The only solution is to `close ()' the socket of the transfer
> connection.  It will not be a valid descriptor and sendfile will return
> an error.

yes, this seems a good solution.

> 
> 
> > I agree, I also would like to have them both. Again, maybe it&#39;s an 
> > socket option problem or a stupid bug in my code :)
> > I tryed to focus on SCTP with 2 applications: a "server" listening on
> > a one-to-many socket and a multiple threads client connecting on a
> > one-to-one socket. Before you need to install a kernel loadable
> > module(lksctp). I&#39;ll send you the sources later today.
> 
> Ok, thanks.
> 
> Giuseppe


Andu.