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Subject:
How to run multiple instances of an application? On a Server?
Category: Computers > Hardware Asked by: jjpaul-ga List Price: $10.00 |
Posted:
10 Apr 2004 23:06 PDT
Expires: 10 May 2004 23:06 PDT Question ID: 328352 |
For a multimedia installation I need to run more instances of the same application (each session of the program has specific parameters and patches and files associated). Considering that I need multiple video outputs, each connected to a different session, how can I achieve this? Multiple workstations won't work (money and space limitations), so would a server be a better idea? | |
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There is no answer at this time. |
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Subject:
Re: How to run multiple instances of an application? On a Server?
From: topbanana-ga on 12 Apr 2004 11:39 PDT |
I'm pretty sure this isn't possible in 9.2, since OS X is based on unix it should be possible within that. Perhaps you should upgrade? |
Subject:
Re: How to run multiple instances of an application? On a Server?
From: topbanana-ga on 12 Apr 2004 11:43 PDT |
Come to think of it, it's been a while since I used 9.2 and I guess it's down to the application, but have you tried duplicating the entire application folder and then running a copy of each app by starting one from each folder? |
Subject:
Re: How to run multiple instances of an application? On a Server?
From: jjpaul-ga on 13 Apr 2004 02:04 PDT |
Hi there... the program in question is part of UI Software's family of graphic apps and they do run *only* in 9.2, as they haven't been ported to OSX yet. Given a) the memory requirements each instance of the program asks for b) that I need 4 separate physical outputs, each accessing one instance of the running app, and most machines only have 2 outputs (which output the same signal BTW) it is therefore almost mandatory that I manage to find another 4-in-1 solution, so to speak. Maybe it's impossible, I understand, but I ain't giving up without a fight ;) As far as available equipm't that is available at the moment, it is really limited. An old & trusty G3 400 w/ 512 Mb memory (quite sufficient to run *one* instance of the program without glitches), and a newer G4 DP 1.25, but it is only bootable in OSX (9.2 emulation). Still on the hunt for projectors but won't commit yet, given the other problms I need to solve. Thank you again, "JJ" Paul |
Subject:
Re: How to run multiple instances of an application? On a Server?
From: mathtalk-ga on 13 Apr 2004 09:01 PDT |
Hi, jjpaul-ga: The basic approach to adding extra video outputs to a Macintosh is by putting video adapter cards into the PCI slots (on a PowerMac) or the PC (PCMCIA) slots (on a PowerBook). As I tried to sketch out, there are several options. An iMac has no extension slots, so as a "closed box" we can rule it out. Your remarks suggest the 4 projectors will need to fit inside the cube, though perhaps cables might allow the Mac itself to remain outside, and you note that money and space are both limiting factors. Some video cards are available with two independent outputs; these are referred to as "dualhead" video adapters. The PCI adapters tend to be less expensive than the PC/PCMCIA counterparts, so if there were physical room for the desktop system, it might make more room in your budget! I'm not sure how much research you require for the list price offered, but at least you've been able to refine your Question considerably from its original statement. The short answer is that with extra video adapters installed and a suitable configuration of the attached projectors as monitors in Control Panel, the applications should be able run in parallel. Of course you should be able to test this on a single monitor, running as windowed applications. There may be something in the application code that prevents more than one instance; the software vendor would be the expert on that, if the test fails for some reason. Then I'd move to getting one extra video adapter and one projector and testing them. Note that the projector by default reverses left/right orientation with respect to screen display, so that it "reads" correctly on the wall. In your case, however, this reversal is unwanted because the display will be projected outward from the cube's interior. Your graphic application may be able to compensate for this, or the projector model may have an option to override this reversal. regards, mathtalk-ga |
Subject:
Re: How to run multiple instances of an application? On a Server?
From: jjpaul-ga on 14 Apr 2004 00:52 PDT |
Ok Mathtalk...got the gist of your last answer, and I will start to see if I can run 4 instances of the same program with my G3... Since my real skills are in the audio field, one last clarification needs to be done...how will the apps know which card/output they need to access? Obviously these kind of apps are produced under the "one app, one computer, one screen/output" assumption. Even if I would install the add'l PCMCIA cards I would still need to find a way to rout the signal to the appropriate buss (to paraphrase what happens in the audio environment). Or am I missing something here? |
Subject:
Re: How to run multiple instances of an application? On a Server?
From: mathtalk-ga on 14 Apr 2004 05:42 PDT |
There is such a thing as a standard Mac user interface, and it involves running things in "windows". It is possible that someone would write an application that does not conform to this standard, as in fact Apple itself is occasionally guilty of. But I'm unable to tie out your description of the "UI Software" graphic applications. I don't know who this company might be or which program in particular you are using. But if there program doesn't run in a "window" (which allows you to move it about), then I'd contact them for options to run it when more than one display device is available. For a bit of insight into how the configuration might work, take a look at the Control Panel applet for displays. One option is to allow all the displays to be coordinated as a "common" desktop, and for many users this makes sense, as program windows can be "dragged" by the mouse from one display to another (or even left overlapping more than one display). It's probably worth buying an extra $100 adapter just to get a feel for this. You might wind up using 1) the built-in display, 2) a single head video adapter, and 3) a dual-head video adapter to reach the four required for your installation. regards, mathtalk-ga |
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