问题

AHV如何分配内存给VM

  • 2020年6月29日
  • 8回答说
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W
Userlevel 1
徽章 ＋２
  • 魏程
  • 开拓者
  • 15日回复

嗨,所有

我只是想知道nutanix AHV如何分配资源(cpu或内存)给虚拟机?

比如VMware资源共享或限制，内存超量使用?

Hi all<\/p>

I just want to know how nutanix AHV allocate resource(cpu or memory) to VMs?<\/p>

Like VMware resource share or limit, and memory overcommit?<\/p>","quoteUsername":"Wei Cheng","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

8回答说

P
Userlevel 6
徽章 + 16

“CPU”和“内存”分别设置为“VM”。如果你超额分配(超过)你的集群可以处理。将抛出错误。

You need to set CPU and memory to VM idividually. If you over assign(more then) your cluster can handle. Error will be thrown.<\/p>","quoteUsername":"Primzy","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
伊万诺夫
排名
Userlevel 4
徽章 ＋5

在当前版本的AHV中没有内存超额订阅。

Sr. SRE | Nutanix全球支持| NSS #464, NCAP, VCP6.5-DCV, RHCSA, CCNA, EMCSA, AWS和谷歌云认证
There is no memory oversubscription\u00a0in AHV in the current versions.<\/p>","quoteUsername":"Sergei Ivanov","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">
W
Userlevel 1
徽章 ＋２

在当前版本的AHV中没有内存超额订阅。

那么设置了多少CPU和内存，主机将消耗多少?不是VM的实际使用?

\t

There is no memory oversubscription\u00a0in AHV in the current versions.<\/p> \t <\/content-quote>

So how much CPU and memory are set, how much will the host consume? Not the actual usage of VM?<\/p>","quoteUsername":"Wei Cheng","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

伊万诺夫
排名
Userlevel 4
徽章 ＋5

虚拟机将消耗当前实际的CPU和内存占用率。

例如，如果创建的虚拟机内存为16Gb，此时的内存利用率为4Gb，则该虚拟机正在占用主机的4Gb内存。但是您不能提供超过主机最大内存的内存。

Sr. SRE | Nutanix全球支持| NSS #464, NCAP, VCP6.5-DCV, RHCSA, CCNA, EMCSA, AWS和谷歌云认证
The VM will be consuming\u00a0the actual current usage of CPU and memory.\u00a0<\/p>

For example, if you create a VM with 16Gb of memory and at this point of time, the usage is 4Gb, it is consuming 4Gb from the host. But you will not be able to provision more than the host\u2019s maximum of memory.<\/p>","quoteUsername":"Sergei Ivanov","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

W
Userlevel 1
徽章 ＋２

@Sergei伊万诺夫

谢谢您的回复

我有一个节点有187.49GB的内存，有三个虚拟机，分别使用内存资源:

VM_A:分配16GB，使用17%

VM_B:分配96GB，占用42.64%

CVM:分配32GB，使用79.83%

那个节点显示它消耗了78.08%的内存，根据上面的使用量，如果看一下实际的使用量，它消耗的内存不会超过这个节点的一半，这个节点显示的消耗数据和虚拟机的内存设置值差不多?

@Sergei Ivanov<\/user-mention><\/p>

Thank you for your reply<\/p>

I have a node with 187.49GB\u00a0of memory on it, there are three VMs , which use memory resources individually:<\/p>

VM_A: assign 16GB, use 17%,<\/p>

VM_B: assign\u00a0 96GB, use 42.64%<\/p>

CVM:\u00a0 assign 32GB , use 79.83%<\/p>

That node show it consumed 78.08% of memory, according to the above usage, if you look at the actual usage, it would\u00a0not consume more than half of the node, the consumption data displayed by this node is similar to the memory setting value of the virtual machine?<\/p>","quoteUsername":"Wei Cheng","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

伊万诺夫
排名
Userlevel 4
徽章 ＋5

嗨 @Wei程

该值相当于该主机上运行的所有虚拟机内存设置值之和。这是因为内存过度分配在AHV上不起作用，您不能为您的虚拟机分配比主机更多的内存。

Sr. SRE | Nutanix全球支持| NSS #464, NCAP, VCP6.5-DCV, RHCSA, CCNA, EMCSA, AWS和谷歌云认证
Hi\u00a0@Wei Cheng<\/user-mention>\u00a0<\/p>

The value displayed for the host is similar to the sum of values of memory settings of the VMs that are running on that host. It is because memory overprovisioning doesn\u2019t work on AHV and you can\u2019t allocate more memory to your VMs than the host has.<\/p>","quoteUsername":"Sergei Ivanov","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

DKim

在当前版本的AHV中没有内存超额订阅。

在不久的将来有支持内存超额订阅的计划吗?

这是阻止我们从vSphere切换到AHV的唯一原因。不幸的是，我们不能为所有的盒子增加内存。

dkim
\t

There is no memory oversubscription\u00a0in AHV in the current versions.<\/p>\t<\/div><\/content-quote>

Is there a plan to support Memory oversubscription in the near future?\u00a0<\/p>

This is the only thing holding us from switching from vSphere to AHV. Unfortunately, we can\u2019t afford to add memory on all the boxes.\u00a0<\/p>","quoteUsername":"DKim","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

伊万诺夫
排名
Userlevel 4
徽章 ＋5

嗨DKim,

它在路线图上，但不是近期的未来。目前还没有具体的预计到达时间。目前，计划在2021年下半年。

Sr. SRE | Nutanix全球支持| NSS #464, NCAP, VCP6.5-DCV, RHCSA, CCNA, EMCSA, AWS和谷歌云认证
Hi DKim,<\/p>

it\u2019s on the roadmap, but not for the near future. There is no concrete ETA at this time. Currently, planned for the 2nd half of 2021.<\/p>","quoteUsername":"Sergei Ivanov","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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