Re: [Xen-devel] [RFC] Lightweight socket communication between domainsin a single machine

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

> Yes. the switch layer has to know whether the peer is in the same host or
> not.
> In the current implementation, version 0.6, we assume that Xen
> administrator knows the IP address of
> each domain in the host, and he/she gives the information manually to the
> swith layers residing every domain that wishes to use Xway. However, that
> manual chore could be replaced with automatic way without difficulty.

Via Xenstore, presumably.  This shouldn't be difficult...

You'd need a way to figure out what IP addresses the domains were using in the 
case of bridging but you can handle this in dom0 I expect.

Cheers,
Mark

> best regards,
> kangho kim.
>
> 2007/5/9, Zhu Han <schumi.han@xxxxxxxxx>:
> > HI,
> >
> > I'm quite curious how Xway find out whether the peer is on the same
> > host or on another host? Does the switch provide such capability?
> >
> > On 5/3/07, êêí <sunnykuz@xxxxxxxxx> wrote:
> > > Dear Ian Pratt.
> > >
> > > Thanks for your attention.
> > >
> > > I attached a PPT file that has some note on the implementation,
> >
> > comparing to
> >
> > > XenSocket.
> > > In each slide of the PPT, I wrote a few lines of slide note. Please
> > > read
> >
> > the
> >
> > > note for more details.
> > > Since I don't know much about XenSocket I comapred only a few features
> >
> > that
> >
> > > I'm interested in.
> > >
> > > I know that this summary slide is not enough to understand the whole
> >
> > things
> >
> > > of Xway.
> > > However, let's start discussion on Xway as well as XenSocket.
> > >
> > > 2007/5/1, Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>:
> > > > > I'd like to introduce a socket communication facility optimized for
> > > > > sending and receiving data between domains in a single machine,
> >
> > named
> >
> > > > > Xway.
> > > >
> > > > Cool.
> > > > Please can you write a few notes on the implementation, comparing and
> > > > contrasting to XenSocket:
> > >
> > > http://www.xensource.com/files/xensummit_4/SuzanneMcIntosh_XenSummit_20
> > >0
> > >
> > > > 7.pdf
> > > >
> > > > I'd like to get a reliable inter-domain byte stream protocol in to
> > > > mainline Xen. Ideally, there'd be a story on remoting it if the VM's
> >
> > got
> >
> > > > migrated to different nodes e.g. tunnelled over TCP or SDP.
> > > >
> > > > Ian
> > > >
> > > > > Xway is a network module that enables socket programs running on
> > > > > virtual machines in a single machine to communicate each other
> > > > > efficiently though socket interface. Xway shows better socket
> > > > > communication latency and bandwidth than the native socket of Xen.
> > > >
> > > > Xway
> > > >
> > > > > also provides binary compatiblity for socket interface, so that the
> > > > > socket programs don't have to be recompiled to exploit the
> >
> > advantages
> >
> > > > > of Xway.
> > > > > We have tested the binary compatiblity for a couple of programs
> > > > > such
> > > >
> > > > as
> > > >
> > > > > ssh, vsftp, proftp, apache, and mysql.
> > > > > Those programs works well without any recompilication or
> >
> > modification
> >
> > > > > to the source codes as we expected.
> > > > >
> > > > > The main schemes of Xway are as follows:
> > > > > 1) shared memory between domains
> > > > > 2) bypassing TCP/IP and Domain 0
> > > > > 3) dual channel approach dividing data send/receive and others on a
> > > > > socket
> > > > >
> > > > > The implementation of Xway can be found at
> > > > > http://sourceforge.net/projects/xway.
> > > > > It consists of  kernel patch, a kernel module, and a user daemon.
> > > > >
> > > > > Please evaluate Xway and comments on it .
> > > > > Feel free to contact me if you meet problems when installing and
> > > > > evaluating it.
> > > > >
> > > > >
> > > > > Thank you  in advance.
> > > > >
> > > > >
> > > > > ----------------------------------------------------
> > > > >
> > > > > Kang-ho Kim
> > > > >
> > > > > Senior Member of Engineering Staff
> > > > >
> > > > > System Software Research Team/Internet Server Group
> > > > > Digital Home Research Division/Electronics and Telecommunications
> > > > > Research Institute
> > > > >
> > > > > 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-350 KOREA
> > > > > Phone : 82-42-860-6226
> > > > >
> > > > > Fax : 82-42-860-6699
> > > > > Mobile : 82-10-4433-8538
> > > > >
> > > > > E-mail : khk@xxxxxxxxxx, sunnykuz@xxxxxxxxx
> > > > > ----------------------------------------------------
> > >
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
> >
> > --
> > best regards,
> > hanzhu



-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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