4:26 p.m.
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This may seem like a silly question but, I just need to wrap my head around
a concept
Are my VMs limited by host or cluster resources?
4 hosts with the following resources per host:
2 6 core intel processors (24 cores per host)
32GB memory
1.2TB NFS storage
So across the cluster I have
96 cpu cores
128GB memory
4.8TB of NFS storage
Can I create a single VM with let's say:
25 cpu cores
64GB of RAM
2TB of storage
Am I limited by the host or the cluster? ( Keep in mind that I'm not
actually going to create such a ridiculous VM but the question is bothering
me). Thanks
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link=3D"#0563C1" vlink=3D"#954F72"><div
class=3DWordSection1><p =
class=3DMsoNormal>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><o:p> </o:p></p><p
class=3DMsoNormal>Are my VMs =
limited by host or cluster resources?<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p
class=3DMsoNormal>4 hosts with =
the following resources per host:<o:p></o:p></p><p
class=3DMsoNormal>2 6 =
core intel processors (24 cores per host)<o:p></o:p></p><p
=
class=3DMsoNormal>32GB memory<o:p></o:p></p><p
class=3DMsoNormal>1.2TB =
NFS storage<o:p></o:p></p><p
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>So across the cluster I have<o:p></o:p></p><p =
class=3DMsoNormal>96 cpu cores<o:p></o:p></p><p
class=3DMsoNormal>128GB =
memory<o:p></o:p></p><p class=3DMsoNormal>4.8TB of NFS =
storage<o:p></o:p></p><p
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Can I create a single VM with let’s =
say:<o:p></o:p></p><p class=3DMsoNormal>25 cpu
cores<o:p></o:p></p><p =
class=3DMsoNormal>64GB of RAM<o:p></o:p></p><p
class=3DMsoNormal>2TB of =
storage<o:p></o:p></p><p
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Am I limited by the host or the cluster? ( Keep in =
mind that I’m not actually going to create such a ridiculous VM =
but the question is bothering me). =
Thanks<o:p></o:p></p></div></body></html>
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4:32 p.m.
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.
On Sat, Feb 8, 2014 at 2:26 PM, Maurice James <midnightsteel(a)msn.com> wrote:
This may seem like a silly question but, I just need to wrap my head
around a concept
Are my VMs limited by host or cluster resources?
4 hosts with the following resources per host:
2 6 core intel processors (24 cores per host)
32GB memory
1.2TB NFS storage
So across the cluster I have
96 cpu cores
128GB memory
4.8TB of NFS storage
Can I create a single VM with let’s say:
25 cpu cores
64GB of RAM
2TB of storage
Am I limited by the host or the cluster? ( Keep in mind that I’m not
actually going to create such a ridiculous VM but the question is bothering
me). Thanks
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
4:36 p.m.
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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(a)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(a)ovirt.org <mailto:Users@ovirt.org>=20
http://lists.ovirt.org/mailman/listinfo/users
=20
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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=
</b><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(a)msn.com</a>&gt; =
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/us...
/o:p></p></blockquote></div><p =
class=3DMsoNormal><o:p> </o:p></p></div></div></body></html>
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3971
days inactive
3971
days old
2 comments
2 participants
participants (2)
-
Dan Yasny -
Maurice James