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--></style></head><body lang="EN-US" link="blue" vlink="purple">Its the client that does all the synchronous replication, this way the cluster is able to scale as the clients do the leg work (so to speak).<br>
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The somewhat "exception" is if a GPFS NSD server (or client with direct NSD) access uses a server bases protocol such as SMB, in this case the SMB server will do the replication as the SMB client doesn't know about GPFS or its replication; essentially the SMB server is the GPFS client.<br>
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-- Lauz<br><br><div class="gmail_quote">On 30 August 2016 17:03:38 CEST, Bryan Banister <bbanister@jumptrading.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The NSD Client handles the replication and will, as you stated, write one copy to one NSD (using the primary server for this NSD) and one to a different NSD
in a different GPFS failure group (using quite likely, but not necessarily, a different NSD server that is the primary server for this alternate NSD).<p></p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers,<p></p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Bryan<p></p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><p> </p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gpfsug-discuss-bounces@spectrumscale.org [mailto:gpfsug-discuss-bounces@spectrumscale.org]
<b>On Behalf Of </b>Brian Marshall<br />
<b>Sent:</b> Tuesday, August 30, 2016 9:59 AM<br />
<b>To:</b> gpfsug main discussion list<br />
<b>Subject:</b> [gpfsug-discuss] Data Replication<p></p></span></p>
<p class="MsoNormal"></p><p> </p>
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<p class="MsoNormal">All,</p><p></p>
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<p class="MsoNormal">If I setup a filesystem to have data replication of 2 (2 copies of data), does the data get replicated at the NSD Server or at the client? i.e. Does the client send 2 copies over the network or does the NSD Server get a single copy and
then replicate on storage NSDs?</p><p></p>
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<p class="MsoNormal"></p><p> </p>
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<p class="MsoNormal">I couldn't find a place in the docs that talked about this specific point.</p><p></p>
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<p class="MsoNormal"></p><p> </p>
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<p class="MsoNormal">Thank you,</p><p></p>
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<p class="MsoNormal">Brian Marshall</p><p></p>
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<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />gpfsug-discuss mailing list<br />gpfsug-discuss at <a href="http://spectrumscale.org">spectrumscale.org</a><br /><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss">http://gpfsug.org/mailman/listinfo/gpfsug-discuss</a><br /></pre></blockquote></div><br>
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