[ninf-users:00138] Re: object handle

[Yusuke Tanimura <yusuke.tanimura@aist.go.jp>]

Hi, Emiliano,

I am a member of the Ninf-G team.

> below there is an answer from Emiliano Tramontana 
> (tramontana@dmi.unict.it); he have some problem to send email to 
> ninf-users@apgrid.org.
> 
> -------
> Actually, I would like to access the same Ninf-G object from two  (or 
> more) different hosts, so as to share the state of the Ninf-G  object 
> between calls originating from different hosts. I suppose  that the 
> handle should be created only once, and passed to another  process on a 
> different host. Does the handle depend on the host  creating it?

Yes, it does.  You cannot pass a handle to another client like that.

> Is there any way for two different client hosts to access the same 
> Ninf-G object?

The answer is no.
On the design of the Ninf-G object handle, an object is dedicated to
a single client which invokes it.

> Yoshio Tanaka wrote:
> > 
> > Ninf-G objects keep status, but the scope of an Ninf-G object is
> > limited to the Ninf-G client which created the Ninf-G object.
> > Ninf-G object cannot be referred by the other processes.
> > 
> 
> Isn't it a limitation when you compare with Sun RPC, which allows 
> different clients to access the same state?

The Ninf-G mainly targets on the scientific computational appliation
on the grid environment and we don't have concrete use cases or
requirements for that functionality, so far.  Also, it might bring much
complexity to the implementation.
I am interested in what kind of scenario you are planning?

Hope this helps you.

-----------------------------------------------------
Yusuke Tanimura <yusuke.tanimura@aist.go.jp>
Grid Technology Research Center, National Institute of AIST
1-1-1 Umezono, Tsukuba Central 2
Tsukuba City 305-8568, Japan
TEL: +81-29-862-6703  / FAX: +81-29-862-6601