[THIN] Re: what goes down an ICA pipe??

Hi Neil,

Many thanks for your response.

Brianos 

-----Original Message-----
From: Braebaum, Neil [mailto:Neil.Braebaum@xxxxxxxxxxxxxxxxx]
Sent: 14 January 2004 10:17
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: what goes down an ICA pipe??


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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********************************************************
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know, in most cases, CPU Utilization IS NOT the single biggest constraint to
scaling up?! Get this free white paper to understand the real constraints &
how to overcome them. SAVE MONEY by scaling-up rather than buying more
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