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<p>Hi Jeff,<br>
</p>
<p>That's not a silly question at all :)</p>
<p>Darshan labels an access as sequential if it occurs at an offset
> the last byte accessed in the file (basically anything that
doesn't seek backwards or overlap the preceding operation).<br>
</p>
<p>Darshan labels an access as consecutive if it occurs at an offset
exactly the last byte accessed + 1 (i.e. sequential, but with no
gaps at all between operations).</p>
<p>Both metrics are from the perspective of a single process. So it
is conceivable that a collection of ranks could produce a workload
that looks consecutive at the file system level, but is
interleaved among ranks such that it only counts as sequential at
the process level.<br>
</p>
<p>thanks,</p>
<p>-Phil<br>
</p>
<div class="moz-cite-prefix">On 8/9/21 10:38 AM, Jeffrey Layton
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAJfzO5RbtFBqMaokMNRXaxdG3MCXHjA6h4d5CKzBytYFLJ_etQ@mail.gmail.com">
<div dir="ltr">
<div>Good morning,</div>
<div><br>
</div>
<div>I have a question about the job summary output. There is a
bar chart with bars labeled as "sequential" and "consecutive".
How are these defined?</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>Jeff</div>
<div><br>
</div>
<div>P.S. Apologies for the silly Monday morning question.</div>
<div><br>
</div>
</div>
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