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<p class="MsoNormal"><span style="font-size:12.0pt">Ah be careful! looking at the man page for mmchconfig “nsdCksumTraditional:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">https://www.ibm.com/support/knowledgecenter/STXKQY_5.0.1/com.ibm.spectrum.scale.v5r01.doc/bl1adm_mmchconfig.htm<o:p></o:p></span></p>
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<li class="MsoNormal" style="mso-list:l0 level1 lfo1"><span style="font-size:12.0pt">Enabling this feature can result in significant I/O performance degradation and a considerable increase in CPU usage.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Bob Oesterlin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Sr Principal Storage Engineer, Nuance<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black"><gpfsug-discuss-bounces@spectrumscale.org> on behalf of "Buterbaugh, Kevin L" <Kevin.Buterbaugh@Vanderbilt.Edu><br>
<b>Reply-To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Date: </b>Friday, May 11, 2018 at 1:29 PM<br>
<b>To: </b>gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject: </b>[EXTERNAL] Re: [gpfsug-discuss] FYI, Spectrum Scale 5.0.1 is out<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On the other hand, we are very excited by this (from the README):
<o:p></o:p></p>
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<pre><b> File systems: Traditional NSD nodes and servers can use checksums<o:p></o:p></b></pre>
<pre><b><o:p> </o:p></b></pre>
<pre><b> NSD clients and servers that are configured with IBM Spectrum Scale can use checksums <o:p></o:p></b></pre>
<pre><b><o:p> </o:p></b></pre>
<pre><b> to verify data integrity and detect network corruption of file data that the client <o:p></o:p></b></pre>
<pre><b><o:p> </o:p></b></pre>
<pre><b> reads from or writes to the NSD server. For more information, see the <o:p></o:p></b></pre>
<pre><b><o:p> </o:p></b></pre>
<pre><b> nsdCksumTraditional and nsdDumpBuffersOnCksumError attributes in the topic mmchconfig command.<o:p></o:p></b></pre>
<pre><b><o:p> </o:p></b></pre>
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<p class="MsoNormal">Finally! Thanks, IBM (seriously)…<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Kevin<o:p></o:p></p>
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<p class="MsoNormal"><br>
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<p class="MsoNormal">On May 11, 2018, at 12:11 PM, Sanchez, Paul <<a href="mailto:Paul.Sanchez@deshaw.com">Paul.Sanchez@deshaw.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D">I’d normally be excited by this, since we do aggressively apply GPFS upgrades. But it’s worth noting that no released version of Scale works with the latest RHEL7 kernel yet (anything >= 3.10.0-780). So if you’re
also in the habit of aggressively upgrading RedHat then you’re going to have to wait for 5.0.1-1 before you can resume that practice.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org"><span style="color:#954F72">gpfsug-discuss-bounces@spectrumscale.org</span></a><span class="apple-converted-space"> </span><<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org"><span style="color:#954F72">gpfsug-discuss-bounces@spectrumscale.org</span></a>><span class="apple-converted-space"> </span><b>On
Behalf Of<span class="apple-converted-space"> </span></b>Bryan Banister<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Friday, May 11, 2018 12:25 PM<br>
<b>To:</b><span class="apple-converted-space"> </span>gpfsug main discussion list (<a href="mailto:gpfsug-discuss@spectrumscale.org"><span style="color:#954F72">gpfsug-discuss@spectrumscale.org</span></a>) <<a href="mailto:gpfsug-discuss@spectrumscale.org"><span style="color:#954F72">gpfsug-discuss@spectrumscale.org</span></a>><br>
<b>Subject:</b><span class="apple-converted-space"> </span>[gpfsug-discuss] FYI, Spectrum Scale 5.0.1 is out<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">It’s on fix central,<span class="apple-converted-space"> </span><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__na01.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fwww-2D945.ibm.com-252Fsupport-252Ffixcentral-26data-3D02-257C01-257CKevin.Buterbaugh-2540vanderbilt.edu-257Cfba17a5bf8c54359d5a308d5b7636fc4-257Cba5a7f39e3be4ab3b45067fa80faecad-257C0-257C0-257C636616560077181684-26sdata-3D9PJJi3aWHak-252FZRO0CWxvV7XN5gOf2Mqdq573WMyH8lI-253D-26reserved-3D0&d=DwMGaQ&c=djjh8EKwHtOepW4Bjau0lKhLlu-DxM1dlgP0rrLsOzY&r=LPDewt1Z4o9eKc86MXmhqX-45Cz1yz1ylYELF9olLKU&m=rAbpsTqYolOXLuyuZ65ElZ4D1J1uwvjRo1hevsn_2VU&s=juQOL76bpLnc5spOjlvmXisqA-fqosmHa5hCN1951-8&e="><span style="color:#954F72">https://www-945.ibm.com/support/fixcentral</span></a><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal">-Bryan<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:Helvetica">_______________________________________________<br>
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