[Carpet] Carpet IO oddity

[Erik Schnetter]

On May 1, 2006, at 07:57:07, Wolfgang Kastaun wrote:

> The order was 0 1 1 2 2 3 3 ....

That points to two processes writing at the same time.

> I dont know why it did not abort, but it ran for hours as I can see  
> from
> the output of the time command at the end of my log. I am pretty  
> sure I
> did not start this run twice the same time, this would leave behind
> output from our queing system, but it did not.

The queuing systems used at AEI and LSU have the property that they  
sometimes do not kill jobs that should be killed.  Without user  
fault, there can be several processes running.  For example, it could  
be that your queuing system started a job, lost contact to the demon  
on that node, assumed that it had died before it started, and  
restarted the job on another node a few seconds later.

I just have an idea how thorn Formaline can detect this case.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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