<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=ks_c_5601-1987">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<!--[if !mso]>
<style id=owaParaStyle>
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:±¼¸²;
panose-1:2 11 6 0 0 1 1 1 1 1;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:"¸¼Àº °íµñ";
panose-1:2 11 5 3 2 0 0 2 0 4;}
@font-face
{font-family:"\@¸¼Àº °íµñ";
panose-1:2 11 5 3 2 0 0 2 0 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"\@±¼¸²";
panose-1:2 11 6 0 0 1 1 1 1 1;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","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
{mso-style-priority:99;
margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"dz¼± µµ¿ò¸» ÅؽºÆ® Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:9.0pt;
font-family:"¸¼Àº °íµñ";}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"¸¼Àº °íµñ";
color:#1F497D;}
span.Char
{mso-style-name:"dz¼± µµ¿ò¸» ÅؽºÆ® Char";
mso-style-priority:99;
mso-style-link:"dz¼± µµ¿ò¸» ÅؽºÆ®";
font-family:"¸¼Àº °íµñ";}
.MsoChpDefault
{mso-style-type:export-only;}
@page Section1
{size:612.0pt 792.0pt;
margin:3.0cm 72.0pt 72.0pt 72.0pt;}
div.Section1
{page:Section1;}
-->
</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=KO link=blue vlink=purple style='word-wrap: break-word'>
<div class=Section1>
<div>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0>
<tr>
<td style='padding:0cm 0cm 0cm 0cm'>
<div>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'>Yes, I used the GlusterFS plugin. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'>Gluster version is - 3.3 beta 2. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'>For the Volumes <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'> Distributed-mirroring volume: Using 4 server and 2(brick)x2(replica)
configuration<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'> Stripe-mirroring volume : Using 4 Server and 4(stripe
count) x 2 (repica) configuration<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'>For the Map/reduce system I user 6 server ( 4 is the brick
server and other 2 is for just map/reduce )<o:p></o:p></span></p>
</div>
</td>
<tr>
<td style='padding:3.75pt 3.75pt 0cm 11.25pt'></td>
</tr>
<tr>
<td style='padding:3.75pt 3.75pt 0cm 11.25pt'></td>
</tr>
</table>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'>I checked your
source file, but I can¡¯t find any clue for the Performance degradation in Merging
Stage. ( I think it is connected with writing) <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'>Actaully, In writing
test, Gluster was quite good. So I¡¯m little confused right now. <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'>Regards<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify;text-justify:inter-ideograph;
text-autospace:none;word-break:break-hangul'><span lang=EN-US
style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";color:#1F497D'>Andrew<o:p></o:p></span></p>
</tr>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"¸¼Àº °íµñ";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> gluster-users-bounces@gluster.org
[mailto:gluster-users-bounces@gluster.org] <b>On Behalf Of </b>Venky Shankar<br>
<b>Sent:</b> Thursday, October 20, 2011 1:35 AM<br>
<b>To:</b> andrew; gluster-users@gluster.org<br>
<b>Subject:</b> Re: [Gluster-users] gluster map/reduce performance..<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>Hi there,<br>
<br>
Appreciate if you could share the following info with us:<br>
<br>
* Are you using GlusterFS hadoop plugin (which is here <a
href="http://download.gluster.com/pub/gluster/glusterfs/qa-releases/3.3-beta-2/glusterfs-hadoop-0.20.2-0.1.x86_64.rpm"
target="_blank">http://download.gluster.com/pub/gluster/glusterfs/qa-releases/3.3-beta-2/glusterfs-hadoop-0.20.2-0.1.x86_64.rpm</a>
and is still in beta) or are you using GlusterFS as an additional layer below
Hadoop's FileSystem (HDFS) ?<br>
<br>
The latter is basically configuring Hadoop to use GlusterFS mount point (e.g.
FUSE mount) as the data directory for Hadoop's DFS.<br>
<br>
Let us know your setup (including GlusterFS version) to debug further.<br>
<br>
Thanks,<br>
-Venky<o:p></o:p></span></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><span lang=EN-US
style='color:black'>
<hr size=2 width="100%" align=center>
</span></div>
<div id=divRpF789062>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>From:</span></b><span
lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'> gluster-users-bounces@gluster.org
[gluster-users-bounces@gluster.org] on behalf of andrew
[sstrato.kong@gmail.com]<br>
<b>Sent:</b> Wednesday, October 19, 2011 6:15 PM<br>
<b>To:</b> gluster-users@gluster.org<br>
<b>Subject:</b> [Gluster-users] gluster map/reduce performance..</span><span
lang=EN-US style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>Hi, all, <o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>i try to check the
performance of Map/Reduce of Gluster File system. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>Mapper side speed is
quite good and it is sometimes faster than hadoop's map job. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>But in the Reduce Side
job is much slower than hadoop. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>i analyze the
result and i found the primary reason of slow speed is bad performance in
Merging stage. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>Would you have any
suggestion for this issue<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>FYI check the
blog <a href="http://storage4com.blogspot.com/" target="_blank">http://storage4com.blogspot.com/</a><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='color:black'>thanks.<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>