gluster config in 4 node cluster
This is a multi-part message in MIME format. --------------060707050503070803070103 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hello, How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ?? a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2 c) stripe2+replica2 = but VM paused any other idea ? regs. Pa. --------------060707050503070803070103 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body text="#000066" bgcolor="#FFFFFF"> Hello,<br> How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ??<br> <br> a) replica 4 - but it takes a lot of space<br> b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2<br> c) stripe2+replica2 = but VM paused <br> <br> any other idea ?<br> regs.<br> Pa.<br> </body> </html> --------------060707050503070803070103--
This is a multi-part message in MIME format. --------------050100050502090900030707 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi, As for me, I would build one cluster with gluster service only based on two nodes (replica 2), and the other one with virt service only based on other two nodes. I think this variant is more scalable in future. PS. I am a new in oVirt, so do not except that I am wrong. 28.05.2015 23:11, paf1@email.cz пишет:
Hello, How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ??
a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2 c) stripe2+replica2 = but VM paused
any other idea ? regs. Pa.
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
--------------050100050502090900030707 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> <br> Hi,<br> <br> As for me, I would build one cluster with gluster service only based on two nodes (replica 2), and the other one with virt service only based on other two nodes. I think this variant is more scalable in future. <br> <br> PS. I am a new in oVirt, so do not except that I am wrong.<br> <br> <br> <div class="moz-cite-prefix">28.05.2015 23:11, <a class="moz-txt-link-abbreviated" href="mailto:paf1@email.cz">paf1@email.cz</a> пишет:<br> </div> <blockquote cite="mid:5567766D.1060104@email.cz" type="cite"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> Hello,<br> How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ??<br> <br> a) replica 4 - but it takes a lot of space<br> b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2<br> c) stripe2+replica2 = but VM paused <br> <br> any other idea ?<br> regs.<br> Pa.<br> <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> --------------050100050502090900030707--
--_000_D19165E2D96Esoerenmalchowmconnet_ Content-Type: text/plain; charset="windows-1251" Content-Transfer-Encoding: quoted-printable Hi For a production environment i would not build a 2 node gluster, i would bu= ild at least 3 nodes to have it much easier with the quorum. Taking into account that you can use commodity hardware i would also sugges= t to split the services, but i would go for at least 3 gluster nodes =96 wh= ich add up to at least 5 nodes for a HA system. If you want 4 in any case, then my suggestion would be to go for 4 replicas= , each node has anything that it needs to run and you can basically use NFS= to localhost for the storage which would make the nodes always access the = local storage for the VMS, availability wise it makes no difference. Cheers Soeren From: =DE=F0=E8=E9 =CF=EE=EB=F2=EE=F0=E0=F6=EA=E8=E9 <y.poltoratskiy@gmail.= com<mailto:y.poltoratskiy@gmail.com>> Date: Sunday 31 May 2015 18:32 To: "users@ovirt.org<mailto:users@ovirt.org>" <users@ovirt.org<mailto:users= @ovirt.org>> Subject: Re: [ovirt-users] gluster config in 4 node cluster Hi, As for me, I would build one cluster with gluster service only based on two= nodes (replica 2), and the other one with virt service only based on other= two nodes. I think this variant is more scalable in future. PS. I am a new in oVirt, so do not except that I am wrong. 28.05.2015 23:11, paf1@email.cz<mailto:paf1@email.cz> =EF=E8=F8=E5=F2: Hello, How to optimal configure 4 node cluster for any one node goes to maintena= nce without stopping VM ?? a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3= .7.2 c) stripe2+replica2 =3D but VM paused any other idea ? regs. Pa. _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org>http://lists.ovirt.org/mailman/listi= nfo/users --_000_D19165E2D96Esoerenmalchowmconnet_ Content-Type: text/html; charset="windows-1251" Content-ID: <4CD1DEC785440646AA8474A539146A4D@liquidcampaign.com> Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dwindows-1= 251"> </head> <body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin= e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami= ly: Calibri, sans-serif;"> <div>Hi</div> <div><br> </div> <div>For a production environment i would not build a 2 node gluster, i wou= ld build at least 3 nodes to have it much easier with the quorum.</div> <div><br> </div> <div>Taking into account that you can use commodity hardware i would also s= uggest to split the services, but i would go for at least 3 gluster nodes = =96 which add up to at least 5 nodes for a HA system.</div> <div><br> </div> <div>If you want 4 in any case, then my suggestion would be to go for 4 rep= licas, each node has anything that it needs to run and you can basically us= e NFS to localhost for the storage which would make the nodes always access= the local storage for the VMS, availability wise it makes no difference.</div> <div><br> </div> <div>Cheers</div> <div>Soeren </div> <div><br> </div> <span id=3D"OLK_SRC_BODY_SECTION"> <div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b= lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:= 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;= BORDER-RIGHT: medium none; PADDING-TOP: 3pt"> <span style=3D"font-weight:bold">From: </span>=DE=F0=E8=E9 =CF=EE=EB=F2=EE= =F0=E0=F6=EA=E8=E9 <<a href=3D"mailto:y.poltoratskiy@gmail.com">y.poltor= atskiy@gmail.com</a>><br> <span style=3D"font-weight:bold">Date: </span>Sunday 31 May 2015 18:32<br> <span style=3D"font-weight:bold">To: </span>"<a href=3D"mailto:users@o= virt.org">users@ovirt.org</a>" <<a href=3D"mailto:users@ovirt.org">= users@ovirt.org</a>><br> <span style=3D"font-weight:bold">Subject: </span>Re: [ovirt-users] gluster = config in 4 node cluster<br> </div> <div><br> </div> <div> <div text=3D"#000000" bgcolor=3D"#FFFFFF"><br> Hi,<br> <br> As for me, I would build one cluster with gluster service only based on two= nodes (replica 2), and the other one with virt service only based on other= two nodes. I think this variant is more scalable in future. <br> <br> PS. I am a new in oVirt, so do not except that I am wrong.<br> <br> <br> <div class=3D"moz-cite-prefix">28.05.2015 23:11, <a class=3D"moz-txt-link-a= bbreviated" href=3D"mailto:paf1@email.cz"> paf1@email.cz</a> =EF=E8=F8=E5=F2:<br> </div> <blockquote cite=3D"mid:5567766D.1060104@email.cz" type=3D"cite">Hello,<br> How to optimal configure 4 node cluster for any one node goes to = ; maintenance without stopping VM ??<br> <br> a) replica 4 - but it takes a lot of space<br> b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVi= rt 3.7.2<br> c) stripe2+replica2 =3D but VM paused <br> <br> any other idea ?<br> regs.<br> Pa.<br> <br> <fieldset class=3D"mimeAttachmentHeader"></fieldset> <br> <pre wrap=3D"">_______________________________________________ Users mailing list <a class=3D"moz-txt-link-abbreviated" href=3D"mailto:Users@ovirt.org">Users= @ovirt.org</a><a class=3D"moz-txt-link-freetext" href=3D"http://lists.ovirt= .org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users<= /a></pre> </blockquote> <br> </div> </div> </span> </body> </html> --_000_D19165E2D96Esoerenmalchowmconnet_--
2015-06-01 2:32 GMT+03:00 Soeren Malchow <soeren.malchow@mcon.net>:
Hi
For a production environment i would not build a 2 node gluster, i would build at least 3 nodes to have it much easier with the quorum.
Taking into account that you can use commodity hardware i would also suggest to split the services, but i would go for at least 3 gluster nodes – which add up to at least 5 nodes for a HA system.
If you want 4 in any case, then my suggestion would be to go for 4 replicas, each node has anything that it needs to run and you can basically use NFS to localhost for the storage which would make the nodes always access the local storage for the VMS, availability wise it makes no difference.
I have data center with one cluster based on 3 nodes with both services: virt and gluster, and GlusterFS as a data domain. Every node has a single HDD as a brick (replica 3) and 2x1G nics with bonding on top (src-dst-ip). I have 2 vlans: 1 - management, 2 - VMs. If in a VM I run something like 'dd if=/dev/zero of=/tmp/tmp' I have around 80+ MB/s write speed, at this moment on SPM node i run 'iftop -i bond0.1' and can see two flows with around 900 Mb/s each of them to the second and to the third nodes (thanks to the bonding that every flow can be done through separate nic). All of this is expected result and in this case we reach a limit of bandwidth our nics. And even if HDD of a node has 150+ MB/s linear write speed I can not reach such speed of write in VMs. What result would I get with 4 nodes and gluster replica 4? I expect that write speed in VM will be much slower, because now SPM node will generate three flows, and two of them will go through one nic and we will have only 500Mb/s per flow and in this way the write speed of VM will be twice lower. Am I wrong?
Cheers Soeren
From: Юрий Полторацкий <y.poltoratskiy@gmail.com> Date: Sunday 31 May 2015 18:32 To: "users@ovirt.org" <users@ovirt.org> Subject: Re: [ovirt-users] gluster config in 4 node cluster
Hi,
As for me, I would build one cluster with gluster service only based on two nodes (replica 2), and the other one with virt service only based on other two nodes. I think this variant is more scalable in future.
PS. I am a new in oVirt, so do not except that I am wrong.
28.05.2015 23:11, paf1@email.cz пишет:
Hello, How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ??
a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2 c) stripe2+replica2 = but VM paused
any other idea ? regs. Pa.
_______________________________________________ Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users
--_000_D1921574DA47soerenmalchowmconnet_ Content-Type: text/plain; charset="windows-1251" Content-Transfer-Encoding: quoted-printable Hi You can have 150MB/s for a while, but evetually the replication has to catc= h up and you will have more and more blocks out of sync. If you really need that much speed you need to go for 10GBit links There are some switches e.g .the ones compatible with Open Network Linux th= at are relativley cheap when it comes to 10Gbit ( http://opennetlinux.org/h= cl ) Cheers Soeren From: =DE=F0=E8=E9 =CF=EE=EB=F2=EE=F0=E0=F6=EA=E8=E9 <y.poltoratskiy@gmail.= com<mailto:y.poltoratskiy@gmail.com>> Date: Monday 1 June 2015 08:56 To: Soeren Malchow <soeren.malchow@mcon.net<mailto:soeren.malchow@mcon.net>=
of <span class=3D""> bandwidth</span></span> our nics. And even if HDD of a node has 150+ MB= /s linear write speed I can not reach such speed of write in VMs.<br> <br> </div> <div>What result would I get with 4 nodes and gluster replica 4? I expect t= hat write speed in VM will be much slower, because now SPM node will genera= te three flows, and two of them will go through one nic and we will have on= ly 500Mb/s per flow and in this way the write speed of VM will be twice lower. <br> <br> </div> <div>Am I wrong?<br> </div> <div><br> </div> <blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-= left:1px solid rgb(204,204,204);padding-left:1ex"> <div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam= ily:Calibri,sans-serif"> <div><br> </div> <div>Cheers</div> <div>Soeren </div> <div><br> </div> <span> <div style=3D"font-family:Calibri;font-size:11pt;text-align:left;color:blac= k;border-width:1pt medium medium;border-style:solid none none;border-color:= rgb(181,196,223) -moz-use-text-color -moz-use-text-color;padding:3pt 0in 0i= n"> <span style=3D"font-weight:bold">From: </span>=DE=F0=E8=E9 =CF=EE=EB=F2=EE= =F0=E0=F6=EA=E8=E9 <<a href=3D"mailto:y.poltoratskiy@gmail.com" target= =3D"_blank">y.poltoratskiy@gmail.com</a>><br> <span style=3D"font-weight:bold">Date: </span>Sunday 31 May 2015 18:32<br> <span style=3D"font-weight:bold">To: </span>"<a href=3D"mailto:users@o= virt.org" target=3D"_blank">users@ovirt.org</a>" <<a href=3D"mailto= :users@ovirt.org" target=3D"_blank">users@ovirt.org</a>><br> <span style=3D"font-weight:bold">Subject: </span>Re: [ovirt-users] gluster = config in 4 node cluster<br> </div> <div> <div class=3D"h5"> <div><br> </div> <div> <div text=3D"#000000" bgcolor=3D"#FFFFFF"><br> Hi,<br> <br> As for me, I would build one cluster with gluster service only based on two= nodes (replica 2), and the other one with virt service only based on other= two nodes. I think this variant is more scalable in future. <br> <br> PS. I am a new in oVirt, so do not except that I am wrong.<br> <br> <br> <div>28.05.2015 23:11, <a href=3D"mailto:paf1@email.cz" target=3D"_blank">p= af1@email.cz</a> =EF=E8=F8=E5=F2:<br> </div> <blockquote type=3D"cite">Hello,<br> How to optimal configure 4 node cluster for any one node goes to = ; maintenance without stopping VM ??<br> <br> a) replica 4 - but it takes a lot of space<br> b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVi= rt 3.7.2<br> c) stripe2+replica2 =3D but VM paused <br> <br> any other idea ?<br> regs.<br> Pa.<br> <br> <fieldset></fieldset> <br> <pre>_______________________________________________ Users mailing list <a href=3D"mailto:Users@ovirt.org" target=3D"_blank">Users@ovirt.org</a><a =
Cc: "users@ovirt.org<mailto:users@ovirt.org>" <users@ovirt.org<mailto:users= @ovirt.org>> Subject: Re: [ovirt-users] gluster config in 4 node cluster 2015-06-01 2:32 GMT+03:00 Soeren Malchow <soeren.malchow@mcon.net<mailto:so= eren.malchow@mcon.net>>: Hi For a production environment i would not build a 2 node gluster, i would bu= ild at least 3 nodes to have it much easier with the quorum. Taking into account that you can use commodity hardware i would also sugges= t to split the services, but i would go for at least 3 gluster nodes =96 wh= ich add up to at least 5 nodes for a HA system. If you want 4 in any case, then my suggestion would be to go for 4 replicas= , each node has anything that it needs to run and you can basically use NFS= to localhost for the storage which would make the nodes always access the = local storage for the VMS, availability wise it makes no difference. I have data center with one cluster based on 3 nodes with both services: vi= rt and gluster, and GlusterFS as a data domain. Every node has a single HDD= as a brick (replica 3) and 2x1G nics with bonding on top (src-dst-ip). I h= ave 2 vlans: 1 - management, 2 - VMs. If in a VM I run something like 'dd if=3D/dev/zero of=3D/tmp/tmp' I have ar= ound 80+ MB/s write speed, at this moment on SPM node i run 'iftop -i bond0= .1' and can see two flows with around 900 Mb/s each of them to the second a= nd to the third nodes (thanks to the bonding that every flow can be done th= rough separate nic). All of this is expected result and in this case we rea= ch a limit of bandwidth our nics. And even if HDD of a node has 150+ MB/s l= inear write speed I can not reach such speed of write in VMs. What result would I get with 4 nodes and gluster replica 4? I expect that w= rite speed in VM will be much slower, because now SPM node will generate th= ree flows, and two of them will go through one nic and we will have only 50= 0Mb/s per flow and in this way the write speed of VM will be twice lower. Am I wrong? Cheers Soeren From: =DE=F0=E8=E9 =CF=EE=EB=F2=EE=F0=E0=F6=EA=E8=E9 <y.poltoratskiy@gmail.= com<mailto:y.poltoratskiy@gmail.com>> Date: Sunday 31 May 2015 18:32 To: "users@ovirt.org<mailto:users@ovirt.org>" <users@ovirt.org<mailto:users= @ovirt.org>> Subject: Re: [ovirt-users] gluster config in 4 node cluster Hi, As for me, I would build one cluster with gluster service only based on two= nodes (replica 2), and the other one with virt service only based on other= two nodes. I think this variant is more scalable in future. PS. I am a new in oVirt, so do not except that I am wrong. 28.05.2015 23:11, paf1@email.cz<mailto:paf1@email.cz> =EF=E8=F8=E5=F2: Hello, How to optimal configure 4 node cluster for any one node goes to maintena= nce without stopping VM ?? a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3= .7.2 c) stripe2+replica2 =3D but VM paused any other idea ? regs. Pa. _______________________________________________ Users mailing list Users@ovirt.org<mailto:Users@ovirt.org>http://lists.ovirt.org/mailman/listi= nfo/users --_000_D1921574DA47soerenmalchowmconnet_ Content-Type: text/html; charset="windows-1251" Content-ID: <506E2D25886427489658B38CE569CCCB@liquidcampaign.com> Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dwindows-1= 251"> </head> <body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin= e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami= ly: Calibri, sans-serif;"> <div>Hi</div> <div><br> </div> <div>You can have 150MB/s for a while, but evetually the replication has to= catch up and you will have more and more blocks out of sync.</div> <div><br> </div> <div>If you really need that much speed you need to go for 10GBit links</di= v> <div><br> </div> <div>There are some switches e.g .the ones compatible with Open Network Lin= ux that are relativley cheap when it comes to 10Gbit ( <a href=3D"http= ://opennetlinux.org/hcl">http://opennetlinux.org/hcl</a> )</div> <div><br> </div> <div>Cheers</div> <div>Soeren </div> <div><br> </div> <span id=3D"OLK_SRC_BODY_SECTION"> <div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b= lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:= 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;= BORDER-RIGHT: medium none; PADDING-TOP: 3pt"> <span style=3D"font-weight:bold">From: </span>=DE=F0=E8=E9 =CF=EE=EB=F2=EE= =F0=E0=F6=EA=E8=E9 <<a href=3D"mailto:y.poltoratskiy@gmail.com">y.poltor= atskiy@gmail.com</a>><br> <span style=3D"font-weight:bold">Date: </span>Monday 1 June 2015 08:56<br> <span style=3D"font-weight:bold">To: </span>Soeren Malchow <<a href=3D"m= ailto:soeren.malchow@mcon.net">soeren.malchow@mcon.net</a>><br> <span style=3D"font-weight:bold">Cc: </span>"<a href=3D"mailto:users@o= virt.org">users@ovirt.org</a>" <<a href=3D"mailto:users@ovirt.org">= users@ovirt.org</a>><br> <span style=3D"font-weight:bold">Subject: </span>Re: [ovirt-users] gluster = config in 4 node cluster<br> </div> <div><br> </div> <div> <div> <div dir=3D"ltr"> <div class=3D"gmail_extra"><br> <div class=3D"gmail_quote">2015-06-01 2:32 GMT+03:00 Soeren Malchow <sp= an dir=3D"ltr"> <<a href=3D"mailto:soeren.malchow@mcon.net" target=3D"_blank">soeren.mal= chow@mcon.net</a>></span>:<br> <blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-= left:1px solid rgb(204,204,204);padding-left:1ex"> <div style=3D"word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-fam= ily:Calibri,sans-serif"> <div>Hi</div> <div><br> </div> <div>For a production environment i would not build a 2 node gluster, i wou= ld build at least 3 nodes to have it much easier with the quorum.</div> <div><br> </div> <div>Taking into account that you can use commodity hardware i would also s= uggest to split the services, but i would go for at least 3 gluster nodes = =96 which add up to at least 5 nodes for a HA system.</div> <div><br> </div> <div>If you want 4 in any case, then my suggestion would be to go for 4 rep= licas, each node has anything that it needs to run and you can basically us= e NFS to localhost for the storage which would make the nodes always access= the local storage for the VMS, availability wise it makes no difference.</div> </div> </blockquote> <div><br> </div> <div>I have data center with one cluster based on 3 nodes with both service= s: virt and gluster, and GlusterFS as a data domain. Every node has a singl= e HDD as a brick (replica 3) and 2x1G nics with bonding on top (src-dst-ip)= . I have 2 vlans: 1 - management, 2 - VMs.<br> <br> </div> <div>If in a VM I run something like 'dd if=3D/dev/zero of=3D/tmp/tmp' I ha= ve around 80+ MB/s write speed, at this moment on SPM node i run 'iftop= -i bond0.1' and can see two flows with around 900 Mb/s each of them to the= second and to the third nodes (thanks to the bonding that every flow can be done through separate nic). All of this= is expected result and in this case we reach a <span id=3D"result_box" class=3D"" lang=3D"en"><span class=3D"">limit</span= href=3D"http://lists.ovirt.org/mailman/listinfo/users" target=3D"_blank">ht= tp://lists.ovirt.org/mailman/listinfo/users</a></pre> </blockquote> <br> </div> </div> </div> </div> </span></div> </blockquote> </div> <br> </div> </div> </div> </div> </span> </body> </html> --_000_D1921574DA47soerenmalchowmconnet_--
Am 01.06.15 um 01:32 schrieb Soeren Malchow:
Hi
For a production environment i would not build a 2 node gluster, i would build at least 3 nodes to have it much easier with the quorum.
Yes, dont build a 2 Node Gluster. Its a pain.... I started of with a two node gluster. In theory it works, but in production it will give you headace. I switched to 3 Node Gluster. Each connected to each other with 2GBit Bonding nics and i am very happy with it and it seems very stable. Even if one node goes down.
Taking into account that you can use commodity hardware i would also suggest to split the services, but i would go for at least 3 gluster nodes – which add up to at least 5 nodes for a HA system.
If you want 4 in any case, then my suggestion would be to go for 4 replicas, each node has anything that it needs to run and you can basically use NFS to localhost for the storage which would make the nodes always access the local storage for the VMS, availability wise it makes no difference.
Cheers Soeren
From: Юрий Полторацкий <y.poltoratskiy@gmail.com <mailto:y.poltoratskiy@gmail.com>> Date: Sunday 31 May 2015 18:32 To: "users@ovirt.org <mailto:users@ovirt.org>" <users@ovirt.org <mailto:users@ovirt.org>> Subject: Re: [ovirt-users] gluster config in 4 node cluster
Hi,
As for me, I would build one cluster with gluster service only based on two nodes (replica 2), and the other one with virt service only based on other two nodes. I think this variant is more scalable in future.
PS. I am a new in oVirt, so do not except that I am wrong.
28.05.2015 23:11, paf1@email.cz пишет:
Hello, How to optimal configure 4 node cluster for any one node goes to maintenance without stopping VM ??
a) replica 4 - but it takes a lot of space b) disperse 3+1 ( raid 5 ) - but bad performance and not visible by oVirt 3.7.2 c) stripe2+replica2 = but VM paused
any other idea ? regs. Pa.
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participants (4)
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ml＠ohnewald.net -
paf1＠email.cz -
Soeren Malchow -
Юрий Полторацкий