<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
</head>
<body>
<p>Yup, our doc is for the classic fairshare not for fairtree.</p>
<p>Thanks for the kudos on the doc by the way. We are glad it is
useful.<br>
</p>
<p>-Paul Edmon-<br>
</p>
<div class="moz-cite-prefix">On 12/2/2020 12:45 PM, Ryan Cox wrote:<br>
</div>
<blockquote type="cite"
cite="mid:3d9b0c40-d6f6-ce6b-8606-026e50e8d0e0@byu.edu">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
That is not for Fair Tree, which is what Micheal asked about.<br>
<br>
Ryan<br>
<br>
<div class="moz-cite-prefix">On 12/2/20 10:32 AM, Renfro, Michael
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:BN7PR07MB424162E02E16422FD14FC41BA2F30@BN7PR07MB4241.namprd07.prod.outlook.com">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}</style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">Yesterday, I posted <a
href="https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.rc.fas.harvard.edu%2Fkb%2Ffairshare%2F&data=04%7C01%7Crenfro%40tntech.edu%7Cc23f89dcb97743ee5eda08d8960679ed%7C66fecaf83dc04d2cb8b8eff0ddea46f0%7C1%7C1%7C637424301864169250%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=%2FnB4ivZeDNrVZiaeupFnAj86oQLOhMu1%2FK6YiuBxTB8%3D&reserved=0"
title="Original URL:
https://docs.rc.fas.harvard.edu/kb/fairshare/ Click to
follow link." moz-do-not-send="true"> <span
style="color:#0563C1">https://docs.rc.fas.harvard.edu/kb/fairshare/</span></a><span
class="apple-converted-space"><span style="color:black"> </span></span>in
response to a similar question. If you want the simplest
general explanation for FairShare values, it's that they
range from 0.0 to 1.0, values above 0.5 indicate that
account or user has used less than their share of the
resource, and values below 0.5 indicate that that account or
user has used more than their share of the resource.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since all your users have the same
RawShares value and are entitled to the same share of the
resource, you can see that bdehaven has the most RawUsage
and the lowest FairShare value, followed by ajoel and xtsao
with almost identical RawUsage and FairShare, and finally
ahantau with very little usage and the highest FairShare
value.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We use FairShare here as the dominant
factor in priorities for queued jobs: if you're a light
user, we bump up your priority over heavier users, and your
job starts quicker than those for heavier users, assuming
all other job attributes are equal.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All these values are relative: in our
setup, we'd bump ahantau's pending jobs ahead of the others,
and put bdehaven's at the end. But if root needed to run a
job outside the sray account, they'd get an enormous bump
ahead since the sray account has used far more than its fair
share of the resource.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
style="font-size:12.0pt;color:black">From: </span></b><span
style="font-size:12.0pt;color:black">slurm-users <a
class="moz-txt-link-rfc2396E"
href="mailto:slurm-users-bounces@lists.schedmd.com"
moz-do-not-send="true"><slurm-users-bounces@lists.schedmd.com></a><br>
<b>Date: </b>Wednesday, December 2, 2020 at 11:23 AM<br>
<b>To: </b><a class="moz-txt-link-abbreviated"
href="mailto:slurm-users@lists.schedmd.com"
moz-do-not-send="true">slurm-users@lists.schedmd.com</a>
<a class="moz-txt-link-rfc2396E"
href="mailto:slurm-users@lists.schedmd.com"
moz-do-not-send="true"><slurm-users@lists.schedmd.com></a><br>
<b>Subject: </b>Re: [slurm-users] FairShare<o:p></o:p></span></p>
</div>
<p style="text-align:center;background:white" align="center"><b><span
style="font-size:12.0pt;color:red;background:white">External
Email Warning</span></b><o:p></o:p></p>
<p
style="mso-margin-top-alt:0in;margin-right:12.0pt;margin-bottom:0in;margin-left:12.0pt;margin-bottom:.0001pt;text-align:center;background:white"
align="center"> <b><span style="font-size:12.0pt;color:red">This
email originated from outside the university. Please use
caution when opening attachments, clicking links, or
responding to requests.</span></b><o:p></o:p></p>
<div class="MsoNormal" style="text-align:center"
align="center">
<hr width="100%" size="0" align="center"> </div>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:12.0pt;color:black">I've read the
manual and I re-read the other link. What they boil
down to is Fair Share is calculated based on a
recondite "rooted plane tree", which I do not have the
background in discrete math to understand.<o:p></o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:12.0pt;color:black">I'm hoping
someone can explain it so my little kernel can
understand.<o:p></o:p></span></p>
</div>
<div class="MsoNormal" style="text-align:center"
align="center">
<hr width="100%" size="0" align="center"> </div>
<div id="divRplyFwdMsg">
<p class="MsoNormal"><b><span style="color:black">From:</span></b><span
style="color:black"> slurm-users <a
class="moz-txt-link-rfc2396E"
href="mailto:slurm-users-bounces@lists.schedmd.com"
moz-do-not-send="true"><slurm-users-bounces@lists.schedmd.com></a>
on behalf of Micheal Krombopulous <a
class="moz-txt-link-rfc2396E"
href="mailto:MichealKrombopulous@outlook.com"
moz-do-not-send="true"><MichealKrombopulous@outlook.com></a><br>
<b>Sent:</b> Wednesday, December 2, 2020 9:32 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated"
href="mailto:slurm-users@lists.schedmd.com"
moz-do-not-send="true">slurm-users@lists.schedmd.com</a>
<a class="moz-txt-link-rfc2396E"
href="mailto:slurm-users@lists.schedmd.com"
moz-do-not-send="true"><slurm-users@lists.schedmd.com></a><br>
<b>Subject:</b> [slurm-users] FairShare</span> <o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Can
someone tell me how to calculate fairshare (under
fairtree)? I can't figure it out. I would have thought
it would be the same score for all users in an
account. E.g., here is one of my accounts:<br>
<br>
Account User RawShares NormShares RawUsage
NormUsage EffectvUsage LevelFS FairShare<br>
-------------------- ---------- ---------- -----------
----------- ----------- ------------- ----------
----------<br>
root
0.000000 611349 1.000000<br>
root root 1
0.076923 0 0.000000 0.000000
inf 1.000000<br>
sray 1
0.076923 30921 0.505582 0.505582 0.152147<br>
sray phedge 1 0.050000
0 0.000000 0.000000 inf
0.181818<br>
sray raab 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray benequist 1 0.050000
0 0.000000 0.000000 inf
0.181818<br>
sray bosch 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray rjenkins 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray esmith 1
0.050000 0 0.000000 0.000000
1.7226e+07 0.054545<br>
sray gheinz 1
0.050000 0 0.000000 0.000000
1.9074e+14 0.072727<br>
sray jfitz 1
0.050000 0 0.000000 0.000000
8.0640e+20 0.081818<br>
sray ajoel 1
0.050000 42449 0.069465 0.137396
0.363913 0.018182<br>
sray jmay 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray aferrier 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray bdehaven 1 0.050000
225002 0.367771 0.727420 0.068736
0.009091<br>
sray msmythe 1 0.050000
0 0.000000 0.000000 inf
0.181818<br>
sray gfink 1
0.050000 0 0.000000 0.000000
2.0343e+05 0.045455<br>
sray ahantau 1 0.050000
31 0.000051 0.000102 491.737549
0.036364<br>
sray hmiller 1
0.050000 0 0.000000 0.000000
inf 0.181818<br>
sray ttinker 1
0.050000 0 0.000000 0.000000
1.4798e+13 0.063636<br>
sray wcooper 1 0.050000
0 0.000000 0.000000 inf
0.181818<br>
sray xtsao 1
0.050000 41734 0.068296 0.135083
0.370143 0.027273<br>
sray xping 1
0.050000 0 0.000000 0.000000
1.9833e+24 0.090909<br>
<br>
<o:p></o:p></p>
</div>
</div>
</div>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Ryan Cox
Director
Office of Research Computing
Brigham Young University
</pre>
</blockquote>
</body>
</html>