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------=_NextPart_000_003D_01CF24EB.F10B5540 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks that clears it up for me =20 =20 From: Dan Yasny [mailto:dyasny@gmail.com]=20 Sent: Saturday, February 08, 2014 4:32 PM To: Maurice James Cc: users Subject: Re: [Users] Resource question =20 The limitation is on the host level. It is generally a bad idea to give = a guest more cores than the host physically has, and in your case, = that's closer to 12 than 24 - HT is not a double core technology, it = only improves performance and scheduling by a bit, sometimes not at all. = Depending on what the VMs are doing, you might be able to run multiple = VMs on the host, going to more assigned virtual CPUs than the host has, = distributed among multiple VMs, but never overcommit in a single VM. =20 On Sat, Feb 8, 2014 at 2:26 PM, Maurice James <midnightsteel@msn.com = <mailto:midnightsteel@msn.com> > wrote: This may seem like a silly question but, I just need to wrap my head = around a concept =20 Are my VMs limited by host or cluster resources? =20 4 hosts with the following resources per host: 2 6 core intel processors (24 cores per host) 32GB memory 1.2TB NFS storage =20 So across the cluster I have 96 cpu cores 128GB memory 4.8TB of NFS storage =20 Can I create a single VM with let=E2=80=99s say: 25 cpu cores 64GB of RAM 2TB of storage =20 Am I limited by the host or the cluster? ( Keep in mind that I=E2=80=99m = not actually going to create such a ridiculous VM but the question is = bothering me). Thanks _______________________________________________ Users mailing list Users@ovirt.org <mailto:Users@ovirt.org>=20 http://lists.ovirt.org/mailman/listinfo/users =20 ------=_NextPart_000_003D_01CF24EB.F10B5540 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <html xmlns:v=3D"urn:schemas-microsoft-com:vml" = xmlns:o=3D"urn:schemas-microsoft-com:office:office" = xmlns:w=3D"urn:schemas-microsoft-com:office:word" = xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml" = xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta = http-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta = name=3DGenerator content=3D"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:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} span.EmailStyle17 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; font-family:"Calibri","sans-serif";} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue = vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'>Thanks that clears it up for me<o:p></o:p></span></p><p = class=3DMsoNormal><span = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><span = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497= D'><o:p> </o:p></span></p><p class=3DMsoNormal><b><span = style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span= style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'> Dan Yasny = [mailto:dyasny@gmail.com] <br><b>Sent:</b> Saturday, February 08, 2014 = 4:32 PM<br><b>To:</b> Maurice James<br><b>Cc:</b> = users<br><b>Subject:</b> Re: [Users] Resource = question<o:p></o:p></span></p><p = class=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal>The = limitation is on the host level. It is generally a bad idea to give a = guest more cores than the host physically has, and in your case, that's = closer to 12 than 24 - HT is not a double core technology, it only = improves performance and scheduling by a bit, sometimes not at = all. <o:p></o:p></p><div><p class=3DMsoNormal>Depending on what the = VMs are doing, you might be able to run multiple VMs on the host, going = to more assigned virtual CPUs than the host has, distributed among = multiple VMs, but never overcommit in a single = VM.<o:p></o:p></p></div></div><div><p class=3DMsoNormal = style=3D'margin-bottom:12.0pt'><o:p> </o:p></p><div><p = class=3DMsoNormal>On Sat, Feb 8, 2014 at 2:26 PM, Maurice James <<a = href=3D"mailto:midnightsteel@msn.com" = target=3D"_blank">midnightsteel@msn.com</a>> = wrote:<o:p></o:p></p><blockquote style=3D'border:none;border-left:solid = #CCCCCC 1.0pt;padding:0in 0in 0in = 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>This may = seem like a silly question but, I just need to wrap my head around a = concept<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><= /o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Are my VMs = limited by host or cluster resources?<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><= /o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>4 hosts = with the following resources per host:<o:p></o:p></p><p = class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>2 6 core = intel processors (24 cores per host)<o:p></o:p></p><p = class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>32GB = memory<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>1.2TB NFS = storage<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><= /o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>So across = the cluster I have<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>96 cpu = cores<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>128GB = memory<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>4.8TB of = NFS storage<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><= /o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Can I = create a single VM with let=E2=80=99s say:<o:p></o:p></p><p = class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>25 cpu = cores<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>64GB of = RAM<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>2TB of = storage<o:p></o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p><= /o:p></p><p class=3DMsoNormal = style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Am I = limited by the host or the cluster? ( Keep in mind that I=E2=80=99m not = actually going to create such a ridiculous VM but the question is = bothering me). Thanks<o:p></o:p></p></div></div><p class=3DMsoNormal = style=3D'margin-bottom:12.0pt'><br>______________________________________= _________<br>Users mailing list<br><a = href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><br><a = href=3D"http://lists.ovirt.org/mailman/listinfo/users" = target=3D"_blank">http://lists.ovirt.org/mailman/listinfo/users</a><o:p><= /o:p></p></blockquote></div><p = class=3DMsoNormal><o:p> </o:p></p></div></div></body></html> ------=_NextPart_000_003D_01CF24EB.F10B5540--