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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sven,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Yes I agree, but “using –N” to reduce the load helps not really. If I use NFS, for example, as a ESX data store, ESX I/O latency for NFS goes very
high, the VM’s hangs. By the way I use SSD PCIe cards, perfect “mirror speed” but slow I/O on NFS.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The GPFS cluster concept I use are different than GSS or traditional FC (shared storage). I use shared nothing with IB (no FPO), many GPFS nodes
with NSD’s. I know the need to resync the FS with mmchdisk / mmrestripe will happen more often. The only one feature will help is QoS for the GPFS admin jobs. I hope we are not fare away from this.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Daniel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gpfsug-discuss-bounces@gpfsug.org [mailto:gpfsug-discuss-bounces@gpfsug.org]
<b>Im Auftrag von </b>Sven Oehme<br>
<b>Gesendet:</b> Mittwoch, 1. Juli 2015 16:21<br>
<b>An:</b> gpfsug main discussion list<br>
<b>Betreff:</b> Re: [gpfsug-discuss] GPFS 4.1.1 without QoS for mmrestripefs?<o:p></o:p></span></p>
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<p>Daniel,<br>
<br>
as you know, we can't discuss future / confidential items on a mailing list. <br>
what i presented as an outlook to future releases hasn't changed from a technical standpoint, we just can't share a release date until we announce it official.<br>
there are multiple ways today to limit the impact on restripe and other tasks, the best way to do this is to run the task ( using -N) on a node (or very small number of nodes) that has no performance critical role. while this is not perfect, it should limit
the impact significantly. .<br>
<br>
sven<br>
<br>
------------------------------------------<br>
Sven Oehme <br>
Scalable Storage Research <br>
email: <a href="mailto:oehmes@us.ibm.com">oehmes@us.ibm.com</a> <br>
Phone: +1 (408) 824-8904 <br>
IBM Almaden Research Lab <br>
------------------------------------------<br>
<br>
<img border="0" width="16" height="16" id="_x0000_i1025" src="cid:image001.gif@01D0B4A7.3A4A2460" alt="Inactive hide details for Daniel Vogel ---07/01/2015 03:29:11 AM---Hi Years ago, IBM made some plan to do a implementation "QoS"><span style="color:#424282">Daniel
Vogel ---07/01/2015 03:29:11 AM---Hi Years ago, IBM made some plan to do a implementation "QoS for mmrestripefs, mmdeldisk...". If a "</span><br>
<br>
<span style="font-size:10.0pt;color:#5F5F5F">From: </span><span style="font-size:10.0pt">Daniel Vogel <<a href="mailto:Daniel.Vogel@abcsystems.ch">Daniel.Vogel@abcsystems.ch</a>></span><br>
<span style="font-size:10.0pt;color:#5F5F5F">To: </span><span style="font-size:10.0pt">"'gpfsug-discuss@gpfsug.org'" <<a href="mailto:gpfsug-discuss@gpfsug.org">gpfsug-discuss@gpfsug.org</a>></span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Date: </span><span style="font-size:10.0pt">07/01/2015 03:29 AM</span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Subject: </span><span style="font-size:10.0pt">[gpfsug-discuss] GPFS 4.1.1 without QoS for mmrestripefs?</span><br>
<span style="font-size:10.0pt;color:#5F5F5F">Sent by: </span><span style="font-size:10.0pt"><a href="mailto:gpfsug-discuss-bounces@gpfsug.org">gpfsug-discuss-bounces@gpfsug.org</a></span><o:p></o:p></p>
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<br>
<br>
<span style="font-family:"Calibri","sans-serif"">Hi</span><br>
<br>
<span style="font-family:"Calibri","sans-serif"">Years ago, IBM made some plan to do a implementation “QoS for mmrestripefs, mmdeldisk…”. If a “mmfsrestripe” is running, very poor performance for NFS access.</span><br>
<span style="font-family:"Calibri","sans-serif"">I opened a PMR to ask for QoS in version 4.1.1 (Spectrum Scale).</span><br>
<br>
<span style="font-family:"Calibri","sans-serif"">PMR 61309,113,848:</span><br>
<i><span style="font-family:"Arial","sans-serif"">I discussed the question of QOS with the development team. These
<br>
command changes that were noticed are not meant to be used as GA code<br>
which is why they are not documented. I cannot provide any further <br>
information from the support perspective. </span></i><span style="font-family:"Arial","sans-serif""><br>
</span><br>
<br>
<span style="font-family:"Calibri","sans-serif"">Anybody knows about QoS? The last hope was at “GPFS Workshop Stuttgart März 2015” with Sven Oehme as speaker.</span><br>
<br>
<span style="font-family:"Calibri","sans-serif"">Daniel Vogel</span><br>
<span style="font-family:"Calibri","sans-serif"">IT Consultant</span><br>
<br>
<b><span style="font-family:"Calibri","sans-serif"">ABC SYSTEMS AG</span></b><br>
<span style="font-family:"Calibri","sans-serif"">Hauptsitz Zürich</span><br>
<span style="font-family:"Calibri","sans-serif"">Rütistrasse 28</span><br>
<span style="font-family:"Calibri","sans-serif"">CH - 8952 Schlieren</span><br>
<span style="font-family:"Calibri","sans-serif"">T +41 43 433 6 433</span><br>
<span style="font-family:"Calibri","sans-serif"">D +41 43 433 6 467</span><br>
<span style="font-family:"Calibri","sans-serif""><a href="http://www.abcsystems.ch">http://www.abcsystems.ch</a></span><br>
<br>
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