Re: ORB breaks when going remote with large messages

[Jules Colding <colding 42tools com>]

Hi Yves,

On 02/04/2008, at 10.32, Yves Willems wrote:
> Jules,
> It looks that my orbit version doesn't support this.
> I'm running on SuSe SLED 10 with orbit 2.12.4-17.6.
> I found out that this feature is only supported from 2.14 on.

Yes, but it is easy to install ORBit2 to, say,  ~/opt.


> The example implementation that was included with the release note  
> uses a
> raw octet sequence type. I suppose that any type can be used with this
> mechanism and that the programmer is responsible for flow control when
> getting the various chuncks, both on server side as on client side.
> Correct?

Yes.

The limit only impact the size of received GIOP data. This means that  
the client must tell the server not to send more than a little less  
than the GIOP receive limit. So the server must support this request  
(usually by a method parameter defined in the IDL) and the client must  
be clever enough to handle such streaming.


> PS: the ORBNetID=ipaddr init parameter has no effect on my  
> application. Is
> that also not yet supported on the 2.12 version?

No. You must use 2.14.10 or later.

HTH,
  jules


> -----Original Message-----
> From: Jules Colding [mailto:colding 42tools com]
> Sent: woensdag 2 april 2008 9:13
> To: ywillems maia-scientific com
> Cc: orbit-list gnome org
> Subject: Re: ORB breaks when going remote with large messages
>
>
> On 01/04/2008, at 17.27, Yves Willems wrote:
> > Hi all,
> >
> >
> > I have an orbit2 client-server app that transfers large objects
> > (images) from server to client app. This works perfect when I run
> > both server and client on the same machine. When I go remote
> > (running the client on a different machine) some calls fail. I have
> > the feeling that it is message size related.
> > Eg. transferring a grey image of 129600 bytes works OK, Sending the
> > same image in color (3x129600) doesn't work.
> > Is there a maximum size that orbit can transfer remotely?
> > I have set the ORBInitialMsgLimit parameter to 1000000.
>
> You can use ORBit_get_giop_recv_limit() to retrieve the maximum
> allowed GIOP receive limit. Anything bigger than that must be
> transferred in chunks. Beware that the limit is the total GIOP message
> size. The actual data size is somewhat smaller.
>
> HTH,
>   jules