[Swift-user] Pointer to Swift tutorials for computational science education and research

[Andrew Stocker]

Thanks for your response!

Since we're just in the stages of experimentation, our preliminary cluster
is just four iMacs connected to a switch.  I set up password-less ssh
communication between the four and I'm able to start the coaster service
(in the folder with coaster-service.conf) without any errors.  I am running
Swift from the computer which has the catnap.sh installed at the correct
path, and I'm pretty sure it has the executable bit set ( #!/bin/sh is the
first line of the program).  None of the other three computers have Swift
installed, nor do they have catnap.sh at the location specified in tc.data,
is this a problem?

Attached is the log file from the run when I got the error I copy+pasted
above.  Interestingly, when I run the catnap swift script with only 3
concurrent instances, it seems to run fine since we allow 3 jobs per node
and so it is probably only running locally.

Regards,
Andrew

On Fri, Sep 5, 2014 at 6:03 PM, Ketan Maheshwari <ketan at mcs.anl.gov> wrote:

> Hi Andrew,
>
> Yes, I remember: thanks for getting back on this.
>
> From the error message and tc.data, indeed it looks like the executable is
> provided as absolute path but somehow Swift is looking into system path and
> not finding it. One possibility is that the node on which catnap.sh is
> running does not have it installed on the path specified in the tc.data.
> Can you also check if catnap.sh has the executable bit set. Less likely
> that this is causing the issue though.
>
> Also, from the tc.data line it looks like you are using persistent
> coasters. Have started the coaster service beforehand and made sure the
> service started correctly without any error messages. Could you indicate
> more about your cluster. Depending on the type of cluster, it is possible
> that we can run Swift in a non-persistent, implicit coasters mode.
>
> Can you also send the Swift generated log for this run.
>
> Thanks,
> Ketan
>
>
> On Fri, Sep 5, 2014 at 7:16 PM, Andrew Stocker <amstocker at dons.usfca.edu>
> wrote:
>
>>  Hi Ketan,
>>
>>  I'm not sure if you remember, but myself and my research advisor
>> Xiaosheng spoke to you at LBL in Oakland at the beginning of the summer
>> about starting to use Swift at our school.   We have been working hard on
>> setting it up, and I am trying to get your demo to run but I'm having a
>> problem.  For some reason I keep getting the following error when I try to
>> run your catsnsleep demo:
>>
>>  Execution failed:
>> Exception in catnap:
>>     Arguments: [5, data.txt]
>>     Host: persistent-coasters
>>     Directory: catsnsleep-20140905-1702-mihcat06/jobs/u/catnap-utx080xl
>>
>>  Caused by:
>> Cannot find executable catnap.sh on site system path
>> catnap, catsnsleep.swift, line 13
>>
>>  However I'm not sure why.  In our tc.data file we have the line:
>>
>>  persistent-coasters catnap
>> /usr/local/swift-0.94.1/oakland-demo/catnap.sh
>>
>>  which I think should work but obviously something is going wrong.  I
>> have been browsing the documentation articles but I can't find anything
>> about why this might be happening.  We would greatly appreciate your advice!
>>
>>  Regards,
>>
>>  Andrew Stocker
>>
>>
>> On Fri, Jun 20, 2014 at 12:00 PM, Xiaosheng Huang <xhuang22 at usfca.edu>
>> wrote:
>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Ketan Maheshwari <ketan at mcs.anl.gov>
>>> Date: Fri, Jun 20, 2014 at 11:45 AM
>>> Subject: Re: Pointer to Swift tutorials for computational science
>>> education and research
>>> To: Xiaosheng Huang <xhuang22 at usfca.edu>
>>> Cc: Wilde <wilde at mcs.anl.gov>
>>>
>>>
>>> Hi Xiaosheng,
>>>
>>>  The tarball is: http://www.mcs.anl.gov/~ketan/oakland-demo.tgz
>>>
>>>  There is a small README in there which outlines the steps.
>>>
>>>  Best,
>>> Ketan
>>>
>>>   ************************************************************
>>> Xiaosheng Huang, Assistant Professor
>>> Department of Physics and Astronomy
>>> University of San Francisco
>>> 2130 Fulton Street, San Francisco, CA 94117-1080
>>>
>>> Phone: (415) 422-6281
>>> E-mail: xhuang22 at usfca.edu
>>> ************************************************************
>>>
>>
>>
>
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