Hey Johann,
We apologize for the difficulties. We will take all of your feedback into
consideration. In the meantime, can you please try one more time using the
current master branch? Julian has been working really hard with Mark and
Mohamad and thinks that is working for Ceph and DAOS. If you could please
try one more time, we would really appreciate it. If not, please note the
preface paragraph in our rules page
<
;:
For ISC20, submission of test runs should use new C-Application io500 which
automatically runs both the new C version and the existing bash version
(following the rules for SC-19) to ensure the consistency of results
between the two implementations. *An exception to this rule is possible for
submitters who have a legitimate reason by requesting an exception from the
committee via comittee(a)io500.org <comittee(a)io500.org>. *[emphasis mine]
Thanks,
John(*)
* These statements merely reflect my own personal view; the only mechanism
for announcing official IO500 policies and decisions is the
committee(a)io500.org email address.
On Fri, May 29, 2020 at 7:50 AM Julian Kunkel via IO-500 <io-500(a)vi4io.org>
wrote:
Hi Johann,
can you use the current master branch of the app? We have it working
for Ceph and DAOS.
Best,
Julian
On Fri, May 29, 2020 at 2:41 PM Lombardi, Johann via IO-500
<io-500(a)vi4io.org> wrote:
>
> Andreas (and the rest of IO-500 committee),
>
>
>
> Thanks for the clarifications. If we had been aware of this new C-app,
we would have been *delighted* to help the committee to test it and debug
it in our environment several months ago. Unfortunately, this wasn’t
announced to this mailing list and we clearly missed it.
>
>
>
> The current situation is that the C-app is clearly broken for
submissions that don’t use the default POSIX backend and we have been
spending a huge amount of time debugging it under a very tight deadline (on
our side, we will only get one window to run the benchmarks on a production
cluster on Monday). At this point, there is a high risk that we won’t be
able to fix the C-app on time and will thus not be able to submit any *new*
results. I understand that we are not the only one in this situation and it
would be a pity to have fewer submissions this time because of the new
requirement. I would advocate for more flexibility and maybe relax the rule
to something like “if the C-app does not work in your environment, please
report the bug and give us a link to the ticket”. We are happy to continue
the debugging activity and make sure the C-app works well for SC’20.
Everyone will be warned at that time and won’t have any excuse. That being
said, for ISC’20, I think that more pro-active communications on this
mailing list several months in advance would have been welcomed.
>
>
>
> Cheers,
>
> Johann
>
>
>
> From: IO-500 <io-500-bounces(a)vi4io.org> on behalf of Andreas Dilger via
IO-500 <io-500(a)vi4io.org>
> Reply-To: Andreas Dilger <adilger(a)dilger.ca>
> Date: Thursday 28 May 2020 at 23:10
> To: "Chaarawi, Mohamad" <mohamad.chaarawi(a)intel.com>
> Cc: "io-500(a)vi4io.org" <io-500(a)vi4io.org>
> Subject: Re: [IO-500] Some rules clarifications?
>
>
>
> On May 28, 2020, at 11:44 AM, Chaarawi, Mohamad via IO-500 <
io-500(a)vi4io.org> wrote:
>
>
>
> Hi John (and rest of IO-500 committee),
>
>
>
> On a different note, could you please shed some light on the committee’s
decision to require 2 “apps” to run the benchmark and not just one?
>
>
>
> It seems this change has been announced very close to the deadline and
the C-app appears to be broken currently for non-POSIX backends (mainly
ones that require extra options that are not IOR generic). Maybe I missed
an earlier notification, and excuse me if I did. But if not, I just feel
that a requirement like that should be made right after the conference for
the next submission deadline, and not so close to the deadline where people
may have already have results to submit using the io-500-dev repo and not
the new io500-app one.
>
>
>
> Mohamad,
>
> the motivation for running two copies of the benchmark and not only one
is that
>
> we want to move forward with using the io500 C-app vs the bash script
because:
>
> - the existing io500.sh script had caused problems for some sites,
because
>
> it is "launching" the various ior/mdtest runs itself via mpirun, rather
>
> than being the executable itself
>
> - parsing results from the mdtest/ior output to generate the scores was
itself
>
> fragile, and prone to error if the output was slightly different
>
>
>
> Running the C-app and bash script overlapping for ISC'20 allows us to
compare
>
> the results across multiple different systems, to ensure that the two
produce
>
> equivalent results, and to ensure that the C-app is working correctly
across
>
> different environments. Having the bash script results available in case
>
> of issues or discrepancies between the two is important to ensure
continuity.
>
>
>
> The C-app has been in development for some time, but has not had much
feedback.
>
> Making it part of the ISC'20 submission for everyone ensures there is
enough
>
> testing before we do a complete changeover to the C-app for SC'20.
>
>
>
> Cheers, Andreas(*)
>
>
>
> * These statements merely reflect my own personal view; the only
mechanism for
>
> announcing official IO500 policies and decisions is the
committee(a)io500.org
>
> email address
>
>
>
>
>
> From: IO-500 <io-500-bounces(a)vi4io.org> on behalf of John Bent via
IO-500 <io-500(a)vi4io.org>
>
> Reply-To: John Bent <johnbent(a)gmail.com>
>
> Date: Thursday, May 28, 2020 at 12:25 PM
>
> To: Mark Nelson <mnelson(a)redhat.com>
>
> Cc: "io-500(a)vi4io.org" <io-500(a)vi4io.org>
>
> Subject: Re: [IO-500] Some rules clarifications?
>
>
>
> Mark and all,
>
>
>
> The committee just added a rule clarifying precreation of directories to
the rules page:
https://www.vi4io.org/io500/rules/submission. The newly
added rule states:
>
>
>
> "Each of the four main phases (IOR easy and hard, and mdtest easy and
hard) has a subdirectory which can be precreated and tuned (e.g. using
tools such as lfs_setstripe or beegfs_ctl); however, additional
subdirectories within these subdirectories cannot be precreated."
>
>
>
> Below my signature, I am including my standard disclaimer that my email
is not necessarily an official IO500 position but note that the rules page
itself is. :)
>
>
>
> Hope this is clear; please do reply with any questions or need for
further clarification,
>
>
>
> Thanks,
>
>
>
> John(*)
>
> * These statements merely reflect my own personal view; the only
mechanism for announcing official IO500 policies and decisions is the
committee(a)io500.orgemail address.
>
>
>
>
>
> On Wed, May 27, 2020 at 5:14 PM John Bent <johnbent(a)gmail.com> wrote:
>
> Hey Mark,
>
>
>
> Thanks for the interest. It will be great to get your contributions!
>
>
>
> 1. Must be exactly 300 seconds.
>
> 2. Does not include the directories. Other historical submissions have
tuned the directories exactly as you describe.
>
> 3. Yes, 10+ metal nodes in AWS satisfies this requirement.
>
>
>
> Other committee members, and community members, please chime in if I got
anything wrong! Mark, you might note the disclaimer below my signature
which is just our committee's way of being careful. I'll make sure to
discuss this email with the rest of the committee and will let you know if
any of my answers need official clarification.
>
>
>
> Thanks,
>
>
>
> John(*)
>
>
>
> * These statements merely reflect my own personal view; the only
mechanism for announcing official IO500 policies and decisions is the
committee(a)io500.orgemail address.
>
>
>
>
>
> On Wed, May 27, 2020 at 4:44 PM Mark Nelson via IO-500 <io-500(a)vi4io.org>
wrote:
>
> Hi Folks,
>
>
>
>
>
> We are thinking about throwing together some cephfs io500 results for
>
> ISC20 and I just wanted to make sure that we are doing the right thing
>
> in a couple of cases. Any help would be much appreciated since we've
>
> never submitted results before. We might have a couple of additional
>
> questions later on, but for now:
>
>
>
>
>
> 1) "All create/write phases must run for at least 300 seconds; the
>
> stonewall flag must be set to 300 which should ensure this."
>
>
>
> Is it acceptable to set the stonewall higher than 300, or is a setting
>
> of exactly 300 required?
>
>
>
>
>
> 2) "The file names for the mdtest output files may not be pre-created."
>
>
>
> Does this also include the directories? We have the ability to pin
>
> directories to specific MDSes that helps in the easy tests. We also have
>
> an experimental feature that more or less does this psuedo-randomly
>
> behind the scenes so long as a top level xattr is set, but it would be
>
> convenient if we could just pre-create the mdtest directories and set
>
> the xattr to pin them individually in the "directory setup" phase of the
>
> test if allowed. Likewise, we have code that allows users to provide a
>
> hint if a specific directory is expected to have lots of files which can
>
> improve performance in the hard tests. I would like to pre-create the
>
> mdtest directory so that we can set the xattr informing ceph that we
>
> expect a lot of files to be written in that directory.
>
>
>
>
>
> 3) "Only submissions using at least 10 physical client nodes are
>
> eligible to win IO500 awards and at least one benchmark process must run
>
> on each."
>
>
>
> We are planning on running on AWS. So long as we are using 10+ metal
>
> nodes does that meet the requirement to have "at least 10 physical
>
> client nodes"?
>
>
>
>
>
> Thanks,
>
>
>
> Mark
>
>
>
> _______________________________________________
>
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>
> IO-500(a)vi4io.org
>
>
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>
> _______________________________________________
>
> IO-500 mailing list
>
> IO-500(a)vi4io.org
>
>
https://www.vi4io.org/mailman/listinfo/io-500
>
>
>
>
>
> Cheers, Andreas
>
>
>
>
>
>
>
>
>
>
>
>
>
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--
Dr. Julian Kunkel
Lecturer, Department of Computer Science
+44 (0) 118 378 8218
http://www.cs.reading.ac.uk/
https://hps.vi4io.org/
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