<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class=""><span class="">Ok, I think I see my error. The rule, near as I can tell, is actually total/parity>2. So, 4+2 gives 6/2=3, and therefore is ok. Eventually I’ll get all this straight!</span></div><div class=""><span class=""><br class=""></span></div><div class=""><span class="">Terry</span></div><div class=""><span class=""><br class=""></span><br class=""><div><blockquote type="cite" class=""><div class="">On Mar 30, 2017, at 23:13, Ashish Pandey <<a href="mailto:aspandey@redhat.com" class="">aspandey@redhat.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" class=""><div class="">Terry,<br class=""></div><div class=""><br class=""></div><div class="">It is (data/parity)>=2. You can very well create 4+2 or 8+4 volume.<br class=""></div><div class="">Are you seeing any error message that you can not create 4+2 config? (4 = data brick and 2 = redundancy brick count)<br class=""></div><div class=""><br class=""></div><div class="">Ashish<br class=""></div><div class=""><br class=""></div><hr id="zwchr" class=""><div style="font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica, Arial, sans-serif; font-size: 12pt;" data-mce-style="color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;" class=""><b class="">From: </b>"Terry McGuire" <<a href="mailto:tmcguire@ualberta.ca" class="">tmcguire@ualberta.ca</a>><br class=""><b class="">To: </b><a href="mailto:gluster-users@gluster.org" class="">gluster-users@gluster.org</a><br class=""><b class="">Sent: </b>Friday, March 31, 2017 3:34:35 AM<br class=""><b class="">Subject: </b>Re: [Gluster-users] Node count constraints with EC?<br class=""><div class=""><br class=""></div>Thanks Ashish, Cedric, for your comments.<div class=""><br class=""></div><div class="">I’m no longer concerned about my choice of 4 nodes to start, but, I realize that there’s an issue with my subvolume config options. Turns out only my 8+3 choice is permitted, as the 4+2 and 8+4 options violate the data/parity>2 rule. So, 8+3 it is, as 8+2 isn’t quite enough redundancy for me.</div><div class=""><br class=""></div><div class="">Regards,</div><div class="">Terry</div><div class=""><br class=""></div><div class=""><br class=""><div class=""><div class=""><blockquote class=""><div class="">On Mar 30, 2017, at 02:14, <a href="mailto:yipikai7@gmail.com" class="" target="_blank" data-mce-href="mailto:yipikai7@gmail.com">yipikai7@gmail.com</a> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">On 30/03/2017 08:35, Ashish Pandey wrote:<br class=""><blockquote cite="mid:526277657.7455351.1490855727083.JavaMail.zimbra@redhat.com" class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" class="" data-mce-style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><div class="">Good point Cedric!!<br class=""></div><div class="">The only thing is that, I would prefer to say "bricks" instead of "nodes" in your statement.<br class=""></div><div class=""><br class=""></div><div class="">"starting with 4 bricks (3+1) can only evolve by adding 4 bricks (3+1)" <br class=""></div></div></blockquote>Oh right, thanks for correcting me !<br class=""> <br class=""> Cheers<br class=""> <br class=""><blockquote cite="mid:526277657.7455351.1490855727083.JavaMail.zimbra@redhat.com" class=""><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;" class="" data-mce-style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><div class=""><br class=""></div><hr id="zwchr" class=""><div style="font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica, Arial, sans-serif; font-size: 12pt;" class="" data-mce-style="font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica, Arial, sans-serif; font-size: 12pt;"><b class="">From: </b>"Cedric Lemarchand" <a class="moz-txt-link-rfc2396E" href="mailto:yipikai7@gmail.com" target="_blank" data-mce-href="mailto:yipikai7@gmail.com"><yipikai7@gmail.com></a><br class=""> <b class="">To: </b>"Terry McGuire" <a class="moz-txt-link-rfc2396E" href="mailto:tmcguire@ualberta.ca" target="_blank" data-mce-href="mailto:tmcguire@ualberta.ca"><tmcguire@ualberta.ca></a><br class=""> <b class="">Cc: </b><a class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org" target="_blank" data-mce-href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br class=""> <b class="">Sent: </b>Thursday, March 30, 2017 11:57:27 AM<br class=""> <b class="">Subject: </b>Re: [Gluster-users] Node count constraints with EC?<br class=""><div class=""><br class=""></div><br class=""> > Le 29 mars 2017 à 20:29, Terry McGuire <a class="moz-txt-link-rfc2396E" href="mailto:tmcguire@ualberta.ca" target="_blank" data-mce-href="mailto:tmcguire@ualberta.ca"><tmcguire@ualberta.ca></a> a écrit :<br class=""> > <br class=""> > I was thinking I’d spread these over 4 nodes, and add single nodes over time, with subvolumes rearranged over new nodes to maintain protection from whole node failures.<br class=""><div class=""><br class=""></div>Also keep in mind that dispersed cluster can only be expanded by the number of initial nodes, eg starting with 4 nodes 3+1 can only evolve by adding 4 nodes 3+1, you cannot change the default policy 3+1 to 4+1. So the granularity of the evolution of the cluster is fixed at the beginning. <br class=""><div class=""><br class=""></div>Cheers<br class=""> _______________________________________________<br class=""> Gluster-users mailing list<br class=""> <a class="moz-txt-link-abbreviated" href="mailto:Gluster-users@gluster.org" target="_blank" data-mce-href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a><br class=""> <a class="moz-txt-link-freetext" href="http://lists.gluster.org/mailman/listinfo/gluster-users" target="_blank" data-mce-href="http://lists.gluster.org/mailman/listinfo/gluster-users">http://lists.gluster.org/mailman/listinfo/gluster-users</a><br data-mce-bogus="1" class=""></div><div class=""><br class=""></div></div></blockquote><br class=""></div></div></blockquote></div><br class=""></div></div><br class="">_______________________________________________<br class="">Gluster-users mailing list<br class="">Gluster-users@gluster.org<br class="">http://lists.gluster.org/mailman/listinfo/gluster-users</div><div class=""><br class=""></div></div></div></div></blockquote></div><br class=""></div></body></html>