<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></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]-->
</head>
<body lang="EN-US" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal">When running ssbench I’ve consistently gotten inconsistent results – 67% difference between the fastest and slowest CREATE times. Nothing (scenario, parameters, cluster, etc…) was varied between the runs. I’m using tempAuth and not Keystone
authentication.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ssbench was run on a node using the internal (10GbE) network that isn’t currently part of the Swift cluster.<o:p></o:p></p>
<p class="MsoNormal">Is this commonly seen with Swift? <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 406 ( 0 error; 0 retries: 0.00%) Average requests per second: 79.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 389 ( 0 error; 0 retries: 0.00%) Average requests per second: 99.8<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 412 ( 0 error; 0 retries: 0.00%) Average requests per second: 65.2<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 416 ( 0 error; 0 retries: 0.00%) Average requests per second: 58.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 406 ( 0 error; 0 retries: 0.00%) Average requests per second: 41.6<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 409 ( 0 error; 0 retries: 0.00%) Average requests per second: 71.3<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">CREATE Count: 395 ( 0 error; 0 retries: 0.00%) Average requests per second: 32.3<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">/var/log/swift entries for a PUT with a large latency doesn’t seem to reveal much:<o:p></o:p></p>
<p class="MsoNormal">root@swift21:/home/swift/bin# grep txeaf22b65bbc442d091373399a931340e /var/log/swift/*<o:p></o:p></p>
<p class="MsoNormal">/var/log/swift/container.log:Aug 9 06:47:40 swift21 container-server 192.168.10.208 - - [09/Aug/2013:13:47:40 +0000] "PUT /sdc/8738/AUTH_test/ssbench_000074/100k.1_000180" 201 - "txeaf22b65bbc442d091373399a931340e" "-" "-" 0.0005<o:p></o:p></p>
<p class="MsoNormal">/var/log/swift/object.log:Aug 9 06:47:40 swift21 object-server 192.168.10.209 - - [09/Aug/2013:13:47:40 +0000] "PUT /sdd/12336/AUTH_test/ssbench_000074/100k.1_000180" 201 - "-" "txeaf22b65bbc442d091373399a931340e" "-" 5.3650<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’d like to investigate the possible source of the large result variation and requests with large latencies. Suggestions on where / what to look at/for are appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Details in: <a href="http://paste.openstack.org/show/43703">
http://paste.openstack.org/show/43703</a> <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Tim<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>