[Beowulf] Parallel programming skills (was Checkpointing using flash)

Prentice Bisbal prentice.bisbal at rutgers.edu
Tue Sep 25 08:10:13 PDT 2012


On 09/25/2012 08:19 AM, Ellis H. Wilson III wrote:
>
> On a related note (I assume a majority of your users are scientists),
> regarding your or somebody else's post a bit back about how poor
> scientists are at coding -- I've witnessed the exact opposite.  Now,
> this is going on limited experience and all, but when I interned at
> Argonne National Labs by Chicago I saw some absolutely amazing code
> written by people without a computer science background that ran on what
> was then one of the top supers in the country (Intrepid).  The point is,
> they need to get their work done, and they know just how painful and
> long poor code will be and take.  Moreover, their careers rest on the
> premise that their calculations and resultant code are correct, and they
> have deadlines like the rest of us that they have to meet, which means
> therefore their code has to complete by.  My golden rule of HPC is
> therefore quite the opposite: "Never underestimate the cleverness of
> your users."  Their code might do "weird" things, but it's simply
> because your framework wasn't adaptive enough.  I have supreme respect
> for most of the "users" I've dealt with, but as I said before, this is
> admittedly going on limited experience and I could be an exceptional case.
>
> Best,
>
> ellis
>

I've been supporting scientific computing here in the US for over 14 
years. I've worked at a DoE National Lab, A pharmaceutical company, a 
large oil company, and a couple of very well-known academic 
institutions, so I've supported a wide range of scientists.

 From my experience, many scientists don't have very good programming 
skills, or computer skills in general. They learn just enough to 
complete their thesis, graduate and then work in their field, using the 
same skills they learned while getting their degree for the rest of 
their lives. Notice I said most, not all.

I've also met some brilliant scientists who knew every aspect of 
computer science (hardware, software, operating system design, and 
algorithms) better than ANY computer scientist I ever met. I've found a 
good part of this variability comes from the field, and the environment. 
For example, from my experience, computational physicists seem to be the 
most computer-savvy, followed by computational chemists, and then the 
life sciences. I've also found that the scientists at national labs seem 
to be the most computer-savvy, too, with people in academia actually 
being the least computer savvy researchers.

Please note I'm speaking in generalizations based on my own experience 
and observations, there are plenty of exceptions to these observations.

I think these trends have significant historical components - 
computational physicists were the first to use computers, so have the 
longest history, and have therefore placed more value on computing and 
programming, going all they back to ENIAC and the Von Neumann computer 
at IAS. Also, the DoE National Labs we the first institutions to use 
computing for research so, likewise, they also have cultivated a high 
value on computer skills.

In industry, well, if you can't produce and be profitable, they'll 
replace you with someone who can.

In academia, they are judged on their science knowledge (physics, 
chemistry, etc), not their computer skills, regardless of how relevant 
those skills are to their field of research. so there's not much 
incentive to improve your computer skills. Although you will find some 
scientists who realize the value of knowing how to use their tools for 
maximum effectiveness even in this environment and become CS experts.

My two cents.

Prentice




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