This is a multi-part message in MIME format. --------------EB5CC7609E582B131F35CB79 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Hello. Out of curiosity, why do you and people in general use more replica 3 than replica 2 ? If I understand correctly this seems overkill and waste of storage as 2 copies of data (replica 2) seems pretty reasonable similar to RAID 1 and still in the worst case the data can be replicated after a fail. I see that replica 3 helps more on performance at the cost of space. Fernando On 24/04/2017 08:33, Sven Achtelik wrote:
Hi All,
my oVirt-Setup is 3 Hosts with gluster and reaplica 3. I always try to stay on the current version and Im applying updates/upgrade if there are any. For this I put a host in maintenance and also use the Stop Gluster Service checkbox. After its done updating Ill set it back to active and wait until the engine sees all bricks again and then Ill go for the next host.
This worked fine for me the last month and now that I have more and more VMs running the changes that are written to the gluster volume while a host is in maintenance become a lot more and it takes pretty long for the healing to complete. What I dont understand is that I dont really see a lot of network usage in the GUI during that time and it feels quiet slow. The Network for the gluster is a 10G and Im quiet happy with the performance of it, its just the healing that takes long. I noticed that because I couldnt update the third host because of unsynced gluster volumes.
Is there any limiting variable that slows down traffic during healing that needs to be configured ? Or should I maybe change my updating process somehow to avoid having so many changes in queue?
Thank you,
Sven
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--------------EB5CC7609E582B131F35CB79 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>Hello.</p> <p>Out of curiosity, why do you and people in general use more replica 3 than replica 2 ?</p> <p>If I understand correctly this seems overkill and waste of storage as 2 copies of data (replica 2) seems pretty reasonable similar to RAID 1 and still in the worst case the data can be replicated after a fail. I see that replica 3 helps more on performance at the cost of space.</p> <p>Fernando<br> </p> <br> <div class="moz-cite-prefix">On 24/04/2017 08:33, Sven Achtelik wrote:<br> </div> <blockquote cite="mid:BFAB40933B3367488CE6299BAF8592D1014E52CC4354@SOCRATES.asl.local" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style><!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-fareast-language:EN-US;} a:link, span.MsoHyperlink {mso-style-priority:99; color:#0563C1; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:#954F72; text-decoration:underline;} span.E-MailFormatvorlage17 {mso-style-type:personal-compose; font-family:"Calibri",sans-serif; color:windowtext;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri",sans-serif; mso-fareast-language:EN-US;} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 2.0cm 70.85pt;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1" /> </o:shapelayout></xml><![endif]--> <div class="WordSection1"> <p class="MsoNormal">Hi All, <o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal"><span lang="EN-US">my oVirt-Setup is 3 Hosts with gluster and reaplica 3. I always try to stay on the current version and Im applying updates/upgrade if there are any. For this I put a host in maintenance and also use the Stop Gluster Service checkbox. After its done updating Ill set it back to active and wait until the engine sees all bricks again and then Ill go for the next host. <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US">This worked fine for me the last month and now that I have more and more VMs running the changes that are written to the gluster volume while a host is in maintenance become a lot more and it takes pretty long for the healing to complete. What I dont understand is that I dont really see a lot of network usage in the GUI during that time and it feels quiet slow. The Network for the gluster is a 10G and Im quiet happy with the performance of it, its just the healing that takes long. I noticed that because I couldnt update the third host because of unsynced gluster volumes.<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US">Is there any limiting variable that slows down traffic during healing that needs to be configured ? Or should I maybe change my updating process somehow to avoid having so many changes in queue? <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US">Thank you, <o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US">Sven<o:p></o:p></span></p> <p class="MsoNormal"><o:p> </o:p></p> </div> <br> <fieldset class="mimeAttachmentHeader"></fieldset> <br> <pre wrap="">_______________________________________________ Users mailing list <a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a> <a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a> </pre> </blockquote> <br> </body> </html> --------------EB5CC7609E582B131F35CB79--