[THIN] Re: what goes down an ICA pipe??
- From: "Braebaum, Neil" <Neil.Braebaum@xxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Wed, 14 Jan 2004 10:17:01 -0000
I'm not convinced there's much in the way of instructions sent over ICA
- I figure it's more in the way of regions, or partials.
Historically, this was why ICA was better / lighter / faster (said in a
Six Million Dollar man kinda way) than RDP over a wan (ICA was - dunno
if still true, but I've got no reason to doubt it, and the logic still
sounds likely - much better at partial screen updates than RDP, but the
difference wasn't so clear or obvious with full screen updates - and
normal usage will probably tend towards a warm, cosy blend of the two),
but why the difference wasn't so obvious, or clear (depending on
application / desktop usage) at LAN speeds.
Neil
> -----Original Message-----
> From: Angus Macdonald [mailto:Angus.Macdonald@xxxxxxxxxxxxxxxxxxx]
> Sent: 14 January 2004 09:28
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: what goes down an ICA pipe??
>
> VNC sends bitmaps down and it's vastly slower than ICA. I'm
> sure ICA must send GDI commands, some of which will naturally
> be bitmaps.
>
> -----Original Message-----
> From: Brian Lilley [mailto:Brian.Lilley@xxxxxxxxxxxxx]
> Sent: 14 January 2004 09:23
> To: 'thin@xxxxxxxxxxxxx'
> Subject: [THIN] Re: what goes down an ICA pipe??
>
> Thanks Neil,
>
> I was wondering how smart ICA is, i.e. I guess it isn't
> simply sending bit changes, but instead using some kind of
> x'like instruction set to at least provide pattern
> repeating/windowing functions?
>
> Cheers, Brian
> -----Original Message-----
> From: Braebaum, Neil [mailto:Neil.Braebaum@xxxxxxxxxxxxxxxxx]
> Sent: 13 January 2004 17:22
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: what goes down an ICA pipe??
>
> Your synopsis is about on the money.
>
> ICA sends partial and full screen updates, X sends
> instructions (as a very rough and ready comparison).
>
> Neil
>
> > -----Original Message-----
> > From: Brian Lilley [mailto:Brian.Lilley@xxxxxxxxxxxxx]
> > Sent: 13 January 2004 16:38
> > To: 'thin@xxxxxxxxxxxxx'
> > Subject: [THIN] what goes down an ICA pipe??
> >
> > Chaps, I have heard several people describe the ICA
> > connection as the windows answer to X. I personally don't
> > think this is correct as I understood that the ICA session is
> > simply sending bitmap screen changes as opposed to X which I
> > understand sends screen drawing commands??
> >
> > Any help much appreciated as usual...
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