Re: kcomd - was Re: OpenMOSIX process migration mechanism

Hello Ian,

<anyone please correct me if I'm wrong>

as far as I understand kcomd doesn't have a discovery functionality -
this should be done in userspace. kcomd is used by oM to communicate
between migrating/migrated processes. This is al running in-kernel and
will only provide the most neccesary functions. By using this mechanism
(see it as communication layer) oM should become more stable.

Node-to-node message passing is quite a general term... But I think the
answer is more or less 'it depends, but kcomd sends and receives
messages'. If a node-to-node-message and a kcomd-message are the same is
not clear to me.

Cheers,
Niels

On Sun, 2006-08-13 at 12:17 +1000, Ian Latter wrote:
> Hello,
> 
> 
>   Does kcomd monitor the availability of the neighbour?  
> I.e. if I poll the oM Map will I know which nodes are 
> active/up? Or just all nodes that have ever been?
> 
>   Also, does the existence of kcomd bring about a
> node-to-node message passing mechanism?  Will keep 
> using my own IP based version if there isn't  ...
> 
> 
> Thanks,
> 
> 
> ----- Original Message -----
> >From: "Matt Dew" <[email protected]>
> >To: <[email protected]>
> >Subject:  Re: [Openmosix-devel] OpenMOSIX process migration 
> mechanism
> >Date: Fri, 11 Aug 2006 09:59:51 -0600
> >
> > (Evan, I'm assuming that was meant for Martin, not me.)
> > 
> > Agreed. You don't want to do this with oM.  Security implications
> > abound.
> > 
> > Matt
> > 
> > On Fri, 2006-08-11 at 05:32 +0000, "Evan Hisey"  wrote:
> > > Matt-
> > >   What you are looking for sounds more like a batch scheduler than
> > > openmosix. I think you would have better luck adapting something like
> > > folding@home or SETI@home for what oyu want to do.
> > > 
> > > Evan
> > > 
> > > On 8/10/06, [email protected] <[email protected]> 
> wrote:
> > > > If the node can be expected to run no more than one or two 
> processes
> > at a
> > > > time,
> > > > which would be the better system with less processor overhead?
> > > >
> > > > Sounds to me like 2.4. is less overhead for the nodes.
> > > > The head node is the one that would benefit from 2.6.  Am I reading
> > that
> > > > correctly?
> > > >
> > > > Also, I want the owner of the node to be able to go to a website,
> > click on
> > > > a link
> > > > and get connected to their choice of project to donate time to. 
> > That
> > > > would probably
> > > > involve a URL such as:  "PROTOCOL://nn.nn.nn.nn#PORT" I'm not 
> sure
> > which
> > > > protocol to use, or how to pass it to oM.  Any suggestions?
> > > >
> > > > > ...
> > > > > Date: Thu, 10 Aug 2006 08:33:40 -0600
> > > > > From: "Matt Dew" <[email protected]>
> > > > > Subject: Re: [Openmosix-devel] OpenMOSIX process migration
> > mechanism
> > > > > ...
> > > > > Hi Irfan,
> > > > >   Under the covers they are quite different.  2.4 has each process
> > > > > maintaining its own comm socket between deputy (home) and 
> remote.
> > > > >
> > > > > 2.6 has a kernel daemon, kcomd, that manages all 
> communications.
> > > >
> > > >
> > -------------------------------------------------------------------------
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> > > >
> > > 
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> > 
> > 
> > -------------------------------------------------------------------------
> > Using Tomcat but need to do more? Need to support web services, 
> security?
> > Get stuff done quickly with pre-integrated technology to make your job 
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> > Download IBM WebSphere Application Server v.1.0.1 based on Apache 
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> > 
> 
> 
> --
> Ian Latter
> Late night coder ..
> http://midnightcode.org/
> 
> 
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> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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> 
-- 
Niels de Vos
http://nixpanic.net/
[email protected]

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