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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black">I need a quick understanding of OST and OSS node confirmation.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:12.0pt;color:black"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">     
</span></span></span><![endif]><span style="font-size:12.0pt;color:black">Can OST and OSS be on different nodes (servers).
<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:12.0pt;color:black"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">     
</span></span></span><![endif]><span style="font-size:12.0pt;color:black">Lustre Manual says that :<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.5in"><span style="font-family:"Times New Roman",serif">“ Running the OSS and a client on the same machine can cause issues with low memory and memory pressure. If the client consumes all the memory and then tries to
 write data to the filesystem, the OSS will need to allocate pages to receive data from the client but will not be able to perform this operation due to low memory. This can cause the client to hang.”</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in;text-autospace:none"><span style="font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black">I have understood this point.<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black">But my question is: Can I use OST on client and OSS on separate server (if it is possible to run OST and OSS on separate servers)<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black">The reason for this is we have tens of servers with internal hard disk of 4T each which we want to use it for OSTs, but all these servers are also should be clients (they are the grid execution
 hosts).<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black">So, I am thinking of having separate OSSs and use the servers itself as OSTs. Also, do we need to install lustre kernel in all those OSTs? Because, all these servers are running with kernel
 2.6.32-573.12.1.el6.x86_64, which the standard lustre packages won’t be supporting. So, we need to roll back to 32-504_lustre kernel and again we need to work on setting yum repos, installing packages, resolving dependencies required for our tools..it’s really
 a lot of work.<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black">So, I am hoping its better to use storage/ OST on raw servers, where it is not required to install any tool related packages and I want to know all the possible options and then decide.<o:p></o:p></span></p>
<p class="MsoListParagraph"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:12.0pt;color:black"><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">     
</span></span></span><![endif]><span style="font-size:12.0pt;color:black">If it is possible to have OST and OSS on separate nodes, please let me know how to configure. A brief example would be much helping. I am really not able to find time to read the complete
 manual.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
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</v:shapetype><v:shape id="Picture_x0020_1" o:spid="_x0000_s1026" type="#_x0000_t75" alt="WNC_Logo" style='position:absolute;margin-left:266.9pt;margin-top:8.9pt;width:59.4pt;height:59.4pt;z-index:-251657216;visibility:visible;mso-wrap-style:square;mso-width-percent:0;mso-height-percent:0;mso-wrap-distance-left:9pt;mso-wrap-distance-top:0;mso-wrap-distance-right:9pt;mso-wrap-distance-bottom:0;mso-position-horizontal:absolute;mso-position-horizontal-relative:text;mso-position-vertical:absolute;mso-position-vertical-relative:text;mso-width-percent:0;mso-height-percent:0;mso-width-relative:page;mso-height-relative:page'>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#2E74B5">Thanks and Regards,<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:#C45911">Jeevan Patnaik B</span></b><b><span style="color:#2E74B5">
</span></b><span style="color:#2E74B5">| </span><span style="color:#BF8F00">Project Engineer</span><span style="color:#2E74B5">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#002060">Nokia IT - HEE Platform</span><span style="color:#2E74B5"> |
</span><span style="color:#2F5496">WIPRO Technologies - Hyderabad</span><span style="color:#2E74B5"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#7F7F7F">Mob: +91-9000607181</span><span style="color:#2E74B5">
</span><span style="color:#7F7F7F">| Off: +91-4030970347.</span><span style="color:black">
</span><span style="color:#2E74B5"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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