Number of virtual machines on a host

Similar Questions

• Number of Virtual Machines in a host

  Dear all,

  I am fairly new with vmware.  As a newbe, I have a lot of request for information on the virtual machine.  As a first step, I have a basic question:

  How we calculate the number of virtual machines that can be installed safely on a host computer.

  For example,.

  The host is with below configuration

  HP DL380 G7, E5645, (6core, 2.4 GHz, 12 MB L3, 80W)

  Dual processor

  48 GB of memory

  8 x 300 GB hard drive

  STD config

  For example, in the configuration above, how WIN2008R2, 8 GB servers can be loaded.

  Is it as 48 / 8 = 6 Machines?

  If so, what is the involvement of CPU cores?

  Your descriptive answer is much appreciated...

  Thanks in advance...

  Welcome to the community,

  This depends on the VM workload. With the material you mention I guess the limiting factor will be the RAM and not the CPU. What is important for this host is have you FBWC attached to the RAID controller to make it work in writeback mode!

  A note more: you will need a licensed version to run ESXi 5.x on this host. The free hypervisor does support up to 32 GB of physical memory.

  André

• Get the number of virtual machines per ESX host

  I am able to get the account with the following script command, but what I want to do is to report a 0 if there is no virtual machines on a host.  Currently it just show nothing if there are no VMs.  Any suggestions?

  Get-VMHost | Sort - the name of the property. Select Name, @{N = "VMCount"; E={($_ | Get - VM). County}}

  You can add an IF in the part of the expression.

  Try it like this

  Get-VMHost | Sort-Object Name | Select Name,@{N="VM";E={if(($_ | Get-VM).Count){($_ | Get-VM).Count} else {0}}}
  

  ____________

  Blog: LucD notes

  Twitter: lucd22

• Number of virtual machines per server

  This number varies greatly with the type of workload and of (among other variables) network connectivity, but what would you say is a common number of virtual machines running on a particular server (NIC10 G ) platform? 10? 20? 40? The number of sockets/cores on this server?

  Any contribution is appreciated.

  Thank you

  Hey Ex,.

  This issue of $ 1 million has been requested several times before.  The answer is simple - there is no definitive answer.  There are so many variables that contribute to the number of virtual machines, you can run on a server:

  -number of Sockets
  -Core per socket

  -CPU speed

  -Density memory

  -Bandwidth allocated by host

  -Storage connectivity & bandwidth

  -Attributes VM & function of workload (amount of memory, CPU & disk by virtual machine)

  Although you can probably squeeze a lot more virtual machines per server with densities increased memory & CPU power, also increases your default domain name.  HA may be able to 'recover' virtual machines on a failed host, but how virtual machines are you willing to lose only once?  When sizing of your hosts, also the failover capabilities take into account.  Each of your cluster hosts should be able to tolerate the failure of at LEAST one host and meet all the requirements of memory & processor of the additional virtual machines now spread over the remaining hosts in the cluster.  This is why administrators does not often grow over 60% of the capacity of their hosts.  VMware uses a calculation of size "slot" to ensure you have adequate to your cluster failover capacity.

  As typical, I see regularly around the mark of 20 VM per server on a typical 2-socket server with 96 GB of memory and dual 10 G uplinks.  It is also good to think that most software licenses (VMware, Nexus 1000v etc.) is based on the counts of socket, and since the memory is going to be your first argument point - servers that can support large amounts of memory are usually an ideal choice.  B250 is perfectly placed to virtual workloads like this, while the B230 is a little firecracker with a bit more CPU power under its hood so you need.

  As vague as I was, I hope this starts your thought process

  Kind regards

  Robert

• Deploy multiple virtual machines on several hosts evenly?

  Hello people!

  I wrote a small script to deploy many virtual machines on several hosts at random.

  But I would rather deploy a virtual machine to each host in a table and then start over again until the number of virtual machines to deploy exhausted.  Distribution of the burden of deployment as evenly as possible.

  Anyone have a suggestion?  Example of nested loops?

  

  PowerShell beginner, here.

  Thank you

  romatlo

  One way to do this is with the modulo operator (%), something like this

  $numVMs = 11

  $tgtEsx = get-Cluster "Westcreek | Get-VMHost-name z420 *.

  1.. $numVMs | %{

  [New-VM-name 'Test $($_)' $tgtEsx[$_%$tgtEsx.Count - VMHost]

  }

• How to count the number of virtual machines on an ESXi server via command line

  I want to know the number of virtual machines running on ESXi. What is the command so that it...?

  "vim - cmd vmsvc/getallvms"

  This order list of the early running of the ESXi Server virtual machine, but I want the number (integer)

  Help, please...

  Thank you

  M@RK! V

  Hello

  You can use the PowerCLI command to get a VM number:

  SE connect-VIServer-Server "ESXi host or vCenter server.

  (Get-VM-location 'ESXi host') .count

  Elodie

• Maximum number of virtual machines by free ESXi hypervisor?

  Community of VMware,

  I just installed the free 5.5 ESXi hypervisor and I wonder if the same virtual machine limits apply to the stand-alone scenario as vCenter? Can I run actually 512 VMs? What, if any, is the maximum number of virtual machines, I can run on a free version of ESXi?

  From 5.5 ESXi limits most have been removed, but only a limit of 8 vCPU per VM remains. So if I'm wrong, the VM 512 mentioned for each host (see http://www.vmware.com/pdf/vsphere5/r55/vsphere-55-configuration-maximums.pdf) affect the free hypervisor.

  André

• How to create disk shared across virtual machines on different hosts

  Hello

  We implement Oracle RAC on two virtual machines, one on each of the two armies for redundancy. For our installation:

  • The two ESXi hosts two SAN access a logical unit number.
  • Two virtual machines on the hosts must have access to a single virtual disk on this LUN (or unit number logic itself) at the same time.

  We tried the following:

  • Creation of a data store associated with the LUN, and then creating a new hard drive on each virtual machine using the same virtual disk on the data store. This operation failed because as soon as a virtual computer runs, the other virtual computer cannot run since the first has a lock on the file from the disk.
  • Creation of a new hard drive on the virtual machine through RDM. This operation failed because only the first virtual machine has this option of disc. Once the ROW has been assigned to the LUN, the other virtual computer cannot create its own RDM for the LUN.

  I'm learning just VMware so I can miss a fundamental method to accomplish this, or perhaps, it is not possible at all. You know a way to create the installer I described?

  Welcome to the community,

  I can not specifically help with the Oracle RAC, however, I would recommend that you take a look at MSCS documentation for how to configure shared disks. There is a difference in the way in which you have installed the VM, for example all VMs on an ESXi host or on different hosts. Please keep in mind that MSCS is a cluster without sharing, which means that only one node at a time has access to a shared virtual disc/RDM.

  André

  PS: I forgot to add the link: http://kb.vmware.com/kb/1004617

• How to count the number of virtual machines that are turned on.

  Try to learn this PowerShell stuff... oh what fun.

  Given that maintenance mode does not work unless you manually VMotion servers or stop them, I am trying to program a loop to make sure that all VM on the host is disabled.

  How can I get the value of "#PoweredOn" in this statement so that I can compare it? I want to leave the loop when the number of virtual machines under voltage = 0.

  function shutdownGuests()

  {

  Get-VMHost HOST1. Get - VM | Stop-VMGuest

  $num_powered_on = $null

  {}

  Write-Host $num_powered_on

  Write-Host $PoweredOn

  $num_powered_on = get-VMHost HOST1. Select-Object Name, @{Name = "#PoweredOn"; Expression = {($_ |)} Get - VM | Where-Object {$_.} PowerState - eq "Receptor"} | Measure-Object). {{Count}}

  Start-Sleep - seconds 10

  } While that ($num_powered_on & gt; 0)

  #Loop and check to see if all VMs are closed, and then return to main()

  }

  Try something like this:

  while (get-vmhost XXX | get-vm | where { $_.PowerState -ne "PoweredOff" }) {
      # Wait a while
  }
  

• Report on the number of virtual machines by datastore

  Hello

  I use vFoglight 6.6.2. I try to have a report generated every week that contains the number of virtual machines running in the data store. But I don't know how to create a table of edge/report for these details.

  request for expert assistance.

  The following query gives you so all virtual machines on the specified data store

  Using the following mandatory input parameters:

  {VMWDatastore}: type foglight - 5:VMWDatastore

  Select objects of type Machine virtual VMware in parameter {VMWDatastore}

  root of {VMWDatastore} / virtualCenter/virtualMachineCollection/virtualMachines

  where:

  ({VMWDatastore} to /datastores and)

  (/ vmState/current/value is equal to "receiving")

  Like query UI setup will allow you to use it as a dashboard of entry.

  Try around with the request and let me know if this help.

  Best regards

  hEINER

• Number of virtual machines per cluster with New-VIProperty

  Hello

  I would like to get the number of virtual machines per cluster using New VIProperty like this:

  New-VIProperty - ObjectType VMHost-name NumberOfVMs'

  -The {($Args [0] |) value} Get - VM | Measure - Object). Count} '

  -Force

  Get-Cluster | Select Name, NumberOfVMs

  But I only get zeros.

  Can someone help me?

  Thank you

  Frédéric

  Take a look at my property NumberOfVms for Clusters.

• IO emits virtual machines in a host

  Hi guys

  I have a 2 Server ESXi cluster build 1065491 for a month of monitoring reported some problems with virtual machines - ping has disappeared.

  After that, I found that VMs statement of losers pings were accommodated in the same server ESXi. Today, a problem has been reported with the vCenter apparatus which did not... do more research I found that all of the virtual machines that are hosted in this particular host appeared this message Windows - Linux

  Source: LSI_SAS

  Event ID: 129

  \Device\RaidPort0, restore the device, has been published.

  Source: disk

  Event ID: 153

  The operation of e/s to 142f8d address logical block to Disk 0 has been retried.

  kernel: mptscsih [40114.926402]: ioc0: quit the task! (sc = ffff8802116c3d80)

  kernel: [40114.926410] sd 0:0:0:0: [sda] CBD: Read (10): 28 00 00 05 57 80 00 00 40 00

  kernel: mptscsih [40115.055129]: ioc0: abandonment of the task: SUCCESS (rv = 2002) (sc = ffff8802116c3d80) (sn = 529576)

  any idea what could cause this problem? or how to fix it?

  Important that I moved a Windows 2012 VM without ESXi server to the problem and messages LSI_SAS and disc problems began to appear

  Thanks a lot guys

  Hello

  I do not understand the LSI SAS and mptscsi messages are coming inside the guests who are having a controller LSI. I agree to a point that the vmhba0 of LSI in the server maybe nothing to do with errors inside the guests because you do not have virtual machines in the local data store but CF.

  So, let's take a look at the usual suspects:

  1. as Memmad has pointed out, in the vmkernel journal, we can see if the FC lun is seen no problem and is reported.

  2 the ESX does very slowly during the execution of commands like esxcfg-scsidevs - m or esxcfg-rescan vmhbaX [X your CF Adapter]

  3 - is the lun configured for multi path in the face of questions, CF once again, it can be newspapers vmkernel. ?

  4. I'm sure that the paging file will be generated when the FC lun, but they have a check if the last file to update the directory of the virtual machine swap at the present time. This is to eliminate any delay in the swap file in writing of the customer due to CF issues.

  5. There was questions previous similar to yours as VM lose pings, decline in performance, but they were in iscsi and 4.1 KB here

  It seems that the guests are abandoned or their scsi reset commands that seems to be the issue here.

• While trying to see Planner installation and operation, the test in local mode, the EXECUTION fails with message "Waiting for the number of virtual machines to register.

  While trying to see installation and operation Planner, the test in local mode with only 1 VM the EXECUTION fails with message "Waiting for the number of virtual machines to register.

  There may be a lot of problems in the desktop VM. Agent service see Planner is not running in VM Office. You can check in the event viewer to see what kind of error occurs. The most usual error missing file IP.txt c; drive or harness IP in the IP.txt produce if there is.

• No network connection between the virtual machines on different hosts ESXi

  I have several 5.0 ESXi hosts in a cluster managed by vCenter Server 5 and I have network problems:

  1. [Host A] running a virtual machine can ping any other computer virtual running on the [host A] great!
  2. A virtual machine running on host [B] can ping any other virtual machine running on [B] home - very well!
  3. [host A] (from the ESXi console) can ping any virtual machine running on [B] home - even better!
  4. [B] home (from the ESXi console) can ping any virtual machine running [host A] - beautiful set!
  5. A virtual machine running [host A] can not ping any virtual computer running on host [B] and vice versa - bad, very bad!

  So basically the problem is that the virtual machines can communicate on hosts. It is a major problem that I need to fix, for obvious reasons.

  Networking on all hosts is configured exactly the same way: a unique and standard vSwitch with a pair of gigabit network cards grouped, vmkernels configured for the vMotion, NFS and network management and a group of ports configured for the VIRTUAL local area network used by the VMs. (vMotion works fine on hosts, storage vMotion works very well too.) All virtual machines are servers Windows (2003 and 2008).

  Reason #3 and #4 above, my assumption is that #5 must be the result of an ESXi/vCenter configuration issue and not a problem with the switches of material upstream. Is this a reasonable assumption?

  Whatever it is, can anyone offer suggestions on how can I fix? It is quite annoying as I'm pretty sure that these hosts are configured in the same manner as those of our production cluster, which does not at all these problems!

  Thanks in advance for any help you guys can provide.

  To be honest, it looks like a problem with your physical network-

  How is the physical network configured - are NIC connects it to the same physical switches? Are the virtual machines on the same subnet? If this is not the case, they are able to ping the gateway sbnet? Can you piing host IP address from the virtual machines?

  I also moved it to a forum more approiate.

• Amount of vRAM to virtual machines on a host

  Hello world

  I wanted to know the vRAM assigned for the sum of all the virtual machines on the host via script powercli and output in csv format. Any help on this will be appreciated.

  Thank you

  vmguy

  Take a look at blogpost query vRAM of Luke. I hope that's all you need.

  To write the output to a .csv file, you can redirect the result of the function Get-vRAMInfo of Luke to the Export-Csv cmdlet.

  Best regards, Robert