[Swift-devel] Some questions about Swift

[Ben Clifford]

On Tue, 26 Feb 2008, jezhee wrote:

>    I have installed the Swift environment in my computer and run some 
> simple examples in local machine.  All things were normal except that 
> the exection was very slow. A simple program just displaying text on the 
> screen took 5 to 10 seconds. Could you tell me why?

There is a lot of startup involved with running a swift program - that is 
probably most of the time you see. This time consists of loading the JVM, 
loading various libraries and compiling your program.

However, if you run two programs, you should find that it takes about the 
same amount of time, not twice as long.

>    Besides, I followed the instructions in the documentation, Swift lab 
> at University of Chicago Computation Institute,part I: Grid 
> workflow(url:http://www.ci.uchicago.edu/osgedu/schools/swiftlab/). BUt, 
> I didn't find the folder sw in my machine, and the file 
> sites-chicago.xml neither. So, I can't let my program run at a remote 
> host. How to solve this?

Those instructions won't work if you are working on your own machine.

Have you ever used Globus to run a job on the grid before? If so, then I 
can show you how to use Swift to submit jobs from there using your 
existing setup.

If you have not, then you should get set up to submit jobs to some 
execution system first - for example, apply for an account on the CI 
gridlab at http://www.ci.uchicago.edu/osgedu/schools/gridlab/

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