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<p class="MsoNormal">Achim,<o:p></o:p></p>
<p class="MsoNormal">Thankyou for your clear reply. Yes indeed we are using AFM at the moment.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> gpfsug-discuss-bounces@spectrumscale.org [mailto:gpfsug-discuss-bounces@spectrumscale.org]
<b>On Behalf Of </b>Achim Rehor<br>
<b>Sent:</b> Thursday, January 25, 2018 11:21 AM<br>
<b>To:</b> gpfsug main discussion list <gpfsug-discuss@spectrumscale.org><br>
<b>Subject:</b> Re: [gpfsug-discuss] storage-based replication for Spectrum Scale<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">John,
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">yes, they definitely can!</span><br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Nodes in a remote cluster are tob viewed just as local nodes in terms of taking part in the mechanisms of access to data.</span><br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Token management will be done just as with local nodes.
</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">So if one node in cluster A recognizes a communication issue with a node in cluster B, it will let the clustermgr know,
</span><br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">and that one then decides on whether to expel one or the other.</span><br>
<br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">Having a remote cluster connected relies on a stable and low latency network, just as a local cluster does.</span><br>
<span style="font-size:10.0pt;font-family:"Arial",sans-serif">if your network is not reliable, you woudl go for AFM or other replication mechanisms (as the thread title implies;) )
</span><br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif"><br>
Mit freundlichen Grüßen / Kind regards</span><o:p></o:p></p>
<p><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Achim Rehor</span></b><o:p></o:p></p>
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<p><span style="font-size:12.0pt"> </span><br>
<br>
<br>
<br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">John Hearns <<a href="mailto:john.hearns@asml.com">john.hearns@asml.com</a>></span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>></span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">25/01/2018 10:53</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif">Re: [gpfsug-discuss] storage-based replication for Spectrum Scale</span><br>
<span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:#5F5F5F">Sent by: </span><span style="font-size:7.5pt;font-family:"Arial",sans-serif"><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a></span><o:p></o:p></p>
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<br>
<br>
<span style="font-size:10.0pt">Jan Frode, thankyou for that link.</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">I have a general question regarding remote GPFS filesystems.</span><br>
<span style="font-size:10.0pt">If we have two clusters, in separate locations on separate Infiniband fabrics,</span><br>
<span style="font-size:10.0pt">we can set up a remote relationship between filesystems.</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">As Valdis discusses, what happens if the IP link between the clusters goes down or is unstable?</span><br>
<span style="font-size:10.0pt">Can nodes in one cluster vote out nodes in the other cluster?</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> </span><br>
<b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt">
<a href="mailto:gpfsug-discuss-bounces@spectrumscale.org">gpfsug-discuss-bounces@spectrumscale.org</a> [</span><a href="mailto:gpfsug-discuss-bounces@spectrumscale.org"><span style="font-size:10.0pt">mailto:gpfsug-discuss-bounces@spectrumscale.org</span></a><span style="font-size:10.0pt">]
<b>On Behalf Of </b>Jan-Frode Myklebust<b><br>
Sent:</b> Wednesday, January 24, 2018 8:08 AM<b><br>
To:</b> gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>><b><br>
Subject:</b> Re: [gpfsug-discuss] storage-based replication for Spectrum Scale</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">Have you seen </span><a href="https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ibm.com%2Fsupport%2Fknowledgecenter%2Fen%2FSTXKQY_4.2.0%2Fcom.ibm.spectrum.scale.v4r2.adv.doc%2Fbl1adv_dr.htm&data=01%7C01%7Cjohn.hearns%40asml.com%7C1e23d7bb660147eab5c908d562f93422%7Caf73baa8f5944eb2a39d93e96cad61fc%7C1&sdata=iFBORcGPjln9bDh1d2vpOHAvjHAZuiNguvNwZSMJJ2g%3D&reserved=0"><span style="font-size:10.0pt">https://www.ibm.com/support/knowledgecenter/en/STXKQY_4.2.0/com.ibm.spectrum.scale.v4r2.adv.doc/bl1adv_dr.htm</span></a><span style="font-size:10.0pt">?
Seems to cover what you’re looking for..</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt"> -jf</span><br>
<span style="font-size:10.0pt"> </span><br>
<span style="font-size:10.0pt">ons. 24. jan. 2018 kl. 07:33 skrev Harold Morales <</span><a href="mailto:hmorales@optimizeit.co"><span style="font-size:10.0pt">hmorales@optimizeit.co</span></a><span style="font-size:10.0pt">>:</span><br>
<span style="font-size:12.0pt;font-family:"Tahoma",sans-serif">Thanks for answering.</span><br>
<span style="font-size:12.0pt;font-family:"Tahoma",sans-serif"> </span><br>
<span style="font-size:12.0pt;font-family:"Tahoma",sans-serif">Essentially, the idea being explored is to replicate LUNs between identical storage hardware (HP 3PAR volumesrein) on both sites. There is an IP connection between storage boxes but not between
servers on both sites, there is a dark fiber connecting both sites. Here they dont want to explore the idea of a scaled-based.</span><br>
<span style="font-size:10.0pt"> </span><br>
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