Bandwidth concideration for X-terminals?
This might not be the exact forum for this; but how do i calculate bandwidth consumption for a X-terminal? I am planning a "blackbox" and to use a remote Multi Head X-terminal to be able to keep my working space as quiet as possible. My idea is to use 3 or 4 (yes three or four!) 1600x1024x32 bpp wide screen monitors and run them as a "dumb" terminal over the network. How do i calculate bandwidth consumption? I want to be able to use the machine as a workstation with full frame video capability on one monitor. I read somewhere that a 640x480@24 fps MPEG-2 file is using some 45 MB in bandwidth. What would a 1600x1024@24 be? (if my math mpu still is functional i estimate some 2.5^2 = 6.25 times 45, which would be some 280 Mb/s) And then coupled with a desktop of 3200x2048 @32 bpp... Thats some 4x1.7 Mpixels to update at a reasonable rate.. (25 fps?) Not sure if i make sense at all.. (Too late for advanced thinking...) -- /Rikard ----------------------------------------------------------------------------- email : rikard.j@rikjoh.com web : http://www.rikjoh.com mob: : +46 (0)763 19 76 25 ------------------------ Public PGP fingerprint ---------------------------- < 15 28 DF 78 67 98 B2 16 1F D3 FD C5 59 D4 B6 78 46 1C EE 56 >
Rikard Johnels wrote:
This might not be the exact forum for this; but how do i calculate bandwidth consumption for a X-terminal?
I am planning a "blackbox" and to use a remote Multi Head X-terminal to be able to keep my working space as quiet as possible. My idea is to use 3 or 4 (yes three or four!) 1600x1024x32 bpp wide screen monitors and run them as a "dumb" terminal over the network.
How do i calculate bandwidth consumption?
I want to be able to use the machine as a workstation with full frame video capability on one monitor. I read somewhere that a 640x480@24 fps MPEG-2 file is using some 45 MB in bandwidth. What would a 1600x1024@24 be? (if my math mpu still is functional i estimate some 2.5^2 = 6.25 times 45, which would be some 280 Mb/s)
And then coupled with a desktop of 3200x2048 @32 bpp... Thats some 4x1.7 Mpixels to update at a reasonable rate.. (25 fps?)
Not sure if i make sense at all.. (Too late for advanced thinking...)
Normally, you wouldn't be transferring a full video to all monitors. X-Terminals are better than that on bandwidth for most tasks. However, you might consider a better alternative, get a machine from http://www.endpcnoise.com/ or use some of their ideas to build a nearly silent PC of your own. I've built several. Fanless motherboard, fanless video cards, special CPU fan, exceedingly large and slow case fans, and a system that can monitor temperature and adjust the fans when required.
This might not be the exact forum for this; but how do i calculate bandwidth consumption for a X-terminal?
Work with it, watch the meter. It is usually between 4 and 12 Mbit/sec per client (in 1024x768x24/32), depending on how much you do. But the more X terminals you have, the more CPU, RAM and network power you need in one box
I am planning a "blackbox" and to use a remote Multi Head X-terminal to be able to keep my working space as quiet as possible.
www.sun.com/sunray/sunray1/ - 15 W power consumption, no fans. Work with Linux too.
My idea is to use 3 or 4 (yes three or four!) 1600x1024x32 bpp wide screen monitors and run them as a "dumb" terminal over the network.
How do i calculate bandwidth consumption?
You asked that before.
I want to be able to use the machine as a workstation with full frame video capability on one monitor.
GL is usually painslow over network, don't try.
I read somewhere that a 640x480@24 fps MPEG-2 file is using some 45 MB in bandwidth.
Fact is, that just does not work well. Playing a VO: [x11] 720x480 => 720x480 Planar YV12 using mplayer results in like 4 fps and 53 MBit/s network load (IOW: no good). Though, I ran that through ssh -X, so encryption on the server side is a bottleneck.
What would a 1600x1024@24 be? (if my math mpu still is functional i estimate some 2.5^2 = 6.25 times 45, which would be some 280 Mb/s)
No. Don't. Watching videos over X terminals is more painful than any low-grade (like NV4) local graphic card. Jan Engelhardt --
On Tuesday 12 September 2006 23:27, Rikard Johnels wrote:
This might not be the exact forum for this; but how do i calculate bandwidth consumption for a X-terminal?
I am planning a "blackbox" and to use a remote Multi Head X-terminal to be able to keep my working space as quiet as possible. My idea is to use 3 or 4 (yes three or four!) 1600x1024x32 bpp wide screen monitors and run them as a "dumb" terminal over the network.
How do i calculate bandwidth consumption?
I want to be able to use the machine as a workstation with full frame video capability on one monitor. I read somewhere that a 640x480@24 fps MPEG-2 file is using some 45 MB in bandwidth. What would a 1600x1024@24 be? (if my math mpu still is functional i estimate some 2.5^2 = 6.25 times 45, which would be some 280 Mb/s)
And then coupled with a desktop of 3200x2048 @32 bpp... Thats some 4x1.7 Mpixels to update at a reasonable rate.. (25 fps?)
Not sure if i make sense at all.. (Too late for advanced thinking...)
Apart from the advice other people gave, you might want to have a look at NX/FreeNX. To name one advantage: better transfer of data (more efficient, and compressed). For more info: http://en.opensuse.org/NX, and especially: http://en.opensuse.org/FreeNX_Server_HOWTO Cheers, Leen
participants (4)
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Jan Engelhardt
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Leendert Meyer
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Rikard Johnels
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suse@rio.vg