[THIN] Re: ICA Bandwith Question

  • From: chris.de.jongh@xxxxxxxxxx
  • To: thin@xxxxxxxxxxxxx, "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
  • Date: Wed, 26 May 2004 09:10:44 +0000

Mark,

tnx for your feedback.
The 2 scenarios have explained or just examples. 
In Scenario 2 you can also have 3 apps like MSWord, MSExcel and MSoutlook for 
example. Shall I use 3x20k or 1x20k ?

Tnx for the feedback.

Chris

>----- Oorspronkelijk bericht -----
>Van
: Mark Cook [mailto:mc@xxxxxxxxxx]
>Verzonden
: woensdag
, mei
 26, 2004 07:26 AM
>Aan
: 'thin@xxxxxxxxxxxxx'
>Onderwerp
: [THIN] Re: ICA Bandwith Question
>
>Chris,
>
>Sadly you can't work it out like this and there is no real hard and fast
>rule.  The ICA protocol itself requires max(ish) 20k, however, there are
>also 32 virtual channels available between the client and server for various
>communications such as drive mapping, printer port mapping, client side
>audio, clipboard etc. etc. etc.
>
>Each of these additional channels requires bandwidth on top of the native
>ICA channel (assuming you actually use them!) and they are not capped in
>terms of bandwidth as such.  So if playing a media player in a session you
>will not only have the ICA protocol traffic but also there will be streaming
>audio from server to client (see note 1 below) and the video playing must be
>sent down the pipe to the client also (see note 2).  Therefore, the amount
>of bandwidth required will vary considerably.  I would strongly recommend
>you look at playing the media files on the local device rather than through
>a citrix session....
>
>Note 1
>------
>   Audio from server to client has three settings for quality,
>Low/Medium/High.  The lower the quality of the audio stream the lower
>bandwidth requirement but increased (slightly) server overhead to
>down-sample the audio.  Therefore, high quality audio requires no
>down-sampling (good for the server) but will consume upwards of 1 - 1.5mbits
>on the LAN per audio stream !!!
>
>Note 2
>------
>   The video will be sent from server to client as a bitmap image stream
>(possibly with JPEG compression if using the latest client etc.) but will
>not be as smooth as the video playing on the local device.
>
>
>Citrix is a cool invention but not one that will always satisfy 100% of all
>your requirements !
>
>
>** If any of the above is not 100% correct at the time of going to press
>then apologies and feel free (as always) to correct the post :-)
>
>
>
>HTH
>
>Mark
>
>
>-----Original Message-----
>From: chris.de.jongh@xxxxxxxxxx [mailto:chris.de.jongh@xxxxxxxxxx] 
>Sent: 26 May 2004 07:53
>To: thin@xxxxxxxxxxxxx
>Subject: [THIN] ICA Bandwith Question
>
>All,
>
>I?m having a question regarding the network bandwidth ICA is using. In all
>docs I?ve read, Citrix claims that an ICA session uses approximately 20 K.
>
>Now I?m having the following question.
>
>How many K will I use with following scenarios?
>
>Scenario 1:
>The desktop is published and a user is starting 3 Media players with a movie
># Session : 1
>Bandwidth : 1 x 20K => 20K
>
>Scenario 2:
>The Media player is published and started 3 times by the user, playing the
>same movie as in scenario 1.
># Sessions : 3
>Bandwidth : 3 x 20K => 60K? or is this only one ICA Session that is using
>the same 20K ??
>
>I need this info to work out a design regarding network bandwidth
>requirements.
>
>I?m looking forward to read any feedback.
>
>Kind regards,
>
>Chris
>
>
>
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**********************************************************
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