What is the interval of time between the virtual machine Linux and ESXi host synchronization?

Similar Questions

• Unable to start the virtual machine after Migration - ESXi hosts

  Last night I wanted to move a virtual machine to a host of test to a production cluster.  All hosts (test and production) have shared access to the same LUN, so I usually am able to simply remove the virtual machines of the inventory in the test environment and add them to the production environment by accessing the .vmx on the data store file.  Two of the 3 hosts migrate perfectly and are running in the production environment.  However, the third server, while the migration starts.

  First he gave me errors that it was missing some files.  The only thing I did was different to rename the folder for the virtual machine on the data store.  It was called 'New Virtual Machine' for a reason, so I renamed it to "Antivirus."  However, something strange happened.  Instead of renaming the folder, it seems was created a new folder named "Antivirus" and the old folder 'New Virtual Machine' was still there.  In addition, the renamed folder 'Antivirus' had only SOME of the files needed.  So I just copied from the old folder in the folder "Antivirus" and he hung up the virtual disk of 20 GB file.  So I closed the VI client and checked the vdmk 20 GB folder and back this morning is in the folder with other files.  However, when I try to start the virtual machine, I get the "cannot access a file because it is locked" error message.

  I've done some detective and I noticed that in my second datastore where was the other folder vdmk, the file was now .40kB in size.  Looks like I've lost my other vdmk folder.  What happens here?

  It looks that the virtual machine was still running when you tried to change the name, so the old folder could not be renamed because of the lock. That's why a new folder has been created instead, and why your vm hung on the vmdk file until the lock has been released. Don't know what happened to the 2nd vmdk file, but the file vmware.log in virtual machine directory must have some info as to why does not start the virtual machine. If the 2nd vmdk is gone, this might be a reason.

  -KjB

  VMware vExpert

  Post edited by: kjb007: changed vm in vmdk

• Migrate the Virtual Machine Linux to ESXi

  Hi all

  I have VMware Server 1 base on CentOS as operating system with a few VMs, VMS spot on my map of storage with NFS.

  I start converting those VMs with vmware converter 4.0 beta, I convert ESXi virtual machine move to storage even but with iSCSI.

  So far I have only converted machines Windows without problem, now, I try to convert the Linux (ContOS 5),

  After the conversion, I try to turn on the machine, but get a "Kernel Panic"

  Impossible to mount the SYSROOT.

  Please see attach.

  Until I find a solution I return to this virtual machine to the old vmware server 1 and then it works.

  Any idea?

  Thank you.

  Hello

  I don't speak of computer virtual SCSI controller, you can get to know that this process.

  (1) select the virtual machine.

  (2) right click go to properties.

  (3) select the Hardware tab, check for SCSI controller entry there you can see if it's the logic Lsi logic or bus controller.

  Once again something that I want to confirm, during the conversion, you had a SCSI disk for this virtual machine.

  Thank you

  Samir

  PS: If you think the answer is useful please consider rewarding points.

• What is the difference between a virtual machine cloning and v2v conversion to a virtual machine

  What is the difference between a virtual machine cloning and v2v conversion to a virtual machine

  Cloning process is to duplicate a VM. V2V is deploy vm on vsphere environment to another virtual machine format (example: the workstation, hyper-v).

• To access the virtual machines of two different hosts

  Greetings,

  I have a question that I can't find the answer to. I am setting up a virtual machine environment small and need to better understand the architecture behind it.

  2 host servers

  1 iSCSI Equallogic San (target)

  I have installed 35i ESX and runnning on two physical hosts. .205 et.206

  I created a data store on my SAN to host my 'model' VM.

  De.205, I can see the data on the SAN network store and browse the virtual machine I (using VMConverter) moved there.

  De.206, I can see the data store on the SAN, but when I sail, I do not see the same information. I see no. VM.

  MY understanding is that using the SAN to store the virtual machine and that I would make the hosts of this data store to run the virtual machine. But the way in which it seems that I have the virtual machine configured on both hosts, always pointing the data store on the San but again using converter, copy de.205 vers.206.

  What don't understand me or that I don't understand.

  Your help is appreciated.

  Welcome to the VMware community forums.   If you have configured things Ok, you will be able to browse the data from these two hosts store and see the same content.  You can register the virtual computers on both hosts.  For an existing VM on the host from 1, you find the data on the host of the 2nd store, right-click on the VMX file and select Add to the inventory.  Have you thought to vcenter server?  It's going to do it is a lot easier.

• The virtual machine failover and restart with vSphere HA time

  Hello

  What factors would affect the time required for vSphere HA to computers failover virtual to a host failed to another active host in the cluster? It would be important how much space drive by using virtual machine is or how big it is? Or who should not matter?

  Thank you

  It should not matter. HA initiates the failover and the powers on the virtual machine regardless of size. Note, however, that there could be a delay in time OS/App.

  Another parameter that can affect the failover time is the number of virtual machines being switched at some point. If you have more healthy hosts in the cluster, then VM failovers happen simultaneously reduce the failover time.

• What is the virtual machine backdoor?

  I fell on what we call a back door virtual machine by reading the following blog post: http://virtualfoundry.blogspot.com/2009/04/protect-console-virtual-firewall.html

  He says the following:

  While you're there, go ahead and disable the virtual computer is backdoor by adding this directive:

  monitor_control.restrict_backdoor = 'true '.

  What is this backdoor? Should I add this command to all my virtual machines?

  Thank you

  The backdoor is a channel of communication between the client and the hypervisor.  It allows guests to enjoy the hypercalls on the hypervisor.   Despite the scary name, it is not a security issue in and of itself, although there is always the possibility a hypercall implementations allows a kind of safety operating.  The backdoor of VMware is implemented as an operation of e/s to a specific port address.  The games instructions VT - x and AMD - V also provides a hypercall mechanism, but we still use the inheritance mechanism, because it is supported by all of our hypervisors, regardless of the underlying implementation.

  The 'monitor_control.restrict_backdoor' configuration option does not disable the door entirely.  As its name suggests, it restricts the use of the backdoor.  In particular, they only allow the guest to use the backdoor when the IOPL prompt > = his CPL.  In general, this means that the client must be running code monitoring, such as the core OS guest, clocked at CPL 0.  (There are some notable exceptions, such as Linux X server, which takes place in CPL 3 with 3 IOPL.)

  When you run a nested VMs, the backdoor should be limited in the external virtual machine if you want to be able to make the inner virtual machine to the hypervisor inner hypercalls.  Otherwise, hypercalls made the inner virtual machine will be provided by the external hypervisor.  If you don't care to install VMware Tools in the virtual machine internal, you don't have to restrict the backdoor into the external virtual machine.

• Activate the Virtual Machine start and stop

  Hello

  I'm not activate Virtual Machine Startup and shutdown I don't know what is right.

  

  Hello

  This is the VMware KB which provide a workaround to enable this option for VMs on ESXi hosts in cluster HA active.

  VMware KB: Automatic Virtual Machine Startup / Shutdown in ESXi hosts in a cluster VSA is turned off

  Last time (couple of years back), when I was researching on this topic, I found that these settings are applied only when the virtual machine is on the same host ESXi, and once his migrated to another ESXi host for this VM autostart option is lost and needs to be reconfigured again. I don't know if this behavior changed with new versions of vSphere.

  I hope this helps.

  Arun-

  Twitter: https://twitter.com/arunpande

  Blog: http://highoncloud.blogspot.in/

  Virtualization VMware on NetApp

• How to reinstall the OS on a virtual machine in the virtual machine Linux drive?

  Hello

  I have problems reinstall OS in a VM Linux (on the Linux host).  I change the CD/DVD (IDE) to connect to an ISO file, save and then play the virtual machine.  I tired send "Ctrl + Alt + Delete", running after stopping, etc., but it will not re - install the new ISO standard (each time it's booting of the operating system already installed).  How can I force the VM to re - install a new ISO standard?

  Thank you.

  -Superfoti

  Hello

  You can delay the start of the machine, press ESC at startup and choose to boot from the CD to the virtual machine. You can also change the boot order in the Bios to automatically boot from the CD first.

  Take a look at the following kb for details on how to change the way the virtual machine starts.

  Good luck!

  Concerning

  Franck

• Comparing the virtual machine RAM and DataStore FreeSpace

  Hi all

  I'm trying to find out where VM is having more RAM compared to the data store space.

  I wrote the script for the same error below and is. More on is it possible I can print as VM name and name of data store after comparing the values. Please suggest.

  $vm = get - vm

  $vm | Select Name,MemoryMB,@{N='FreeSpaceMB'; E = {(Get-DataStore |)} Where {$_.} Name - eq ($vm. ({ExtensionData.Config.Files.VmPathName). Split('[]') [1]}). FreeSpaceMB}} | WHERE {$VM.memorymb - ge $_.} FreespaceMB}

  PowerCLI C:\ > $vm | Select Name,MemoryMB,@{N='FreeSpaceMB'; E = {(Get-DataStore |)} Where {$_.} Name - eq ($vm. ({ExtensionData.Config.Files.VmPathName). Split('[]') [1]}). FreeSpaceMB}} | WHERE {$VM.memorymb - ge $_.} FreespaceMB}

  Can't compare "4096" to "1621381 1621333". Error: "could not convert the.

  Value "System.Object []" type "System.Object []" type "System.Decimal. »

  At line: 1 char: 168

  {{+... ceMB}} | WHERE {$VM.memorymb - ge $_.} FreespaceMB}

  +                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  + CategoryInfo: InvalidOperation: (:)) [], RuntimeException)

  + FullyQualifiedErrorId: ComparisonFailure

  Try like this

  Get - VM |

  Select Name, MemoryMB,

  @{N = "FreeSpaceMB"; E = {(Get-Datastore-nom ($_.))} ExtensionData.Config.Files.VmPathName). Split('[]') [1] | Select - 1 first). FreeSpaceMB}} |

  WHERE {$VM.memorymb - ge $_.} FreespaceMB}

• Will be the virtual machine starts on another host (during the blackout) if he can't switch to Maintenance Mode?

  Hello

  We use a cluster with 2 5.1 ESXi hosts.  When attempting to place an ESXi host in Maintenance mode, he failed and said "not enough resources to satisfy configured level of failover for HA.

  We would like to know, just in case where one of these ESXi hosts failed, VMs will be start on another ESXi host (at least some) or all of them will be down (i.e. None of them start)?  If no virtual machine will be migrated, we will change our level of failover for HA.

  Thank you

  This occurs when you enable admission control on your HA cluster. When the failure of the host occurs and you have Admission control is enabled, it will let all market on the other host machines because it violates the constraints of availability.

  If you turn this off all VM is switched even if you do not have enough resources to accommodate all the s VM on a single host. On a long term, I would say that you have sufficient resources to allow this to happen. But for now, you can turn it off and try.

  

• Move the virtual machine Linux from AMD to Intel

  Hi, I'm running several CentOS 5.4 and 5.5 virtual machines on an AMD64 based host ESXi 4. I need to replace the AMD ESXi 5 host and move the VM to host Intel based host with an Intel-based.
  
  I did it with a VM test (cold migration), and it seems boot, but I read that I might need to change the kernel for Intel.  Is this necessary?  If so, can someone point me in the right direction on how to do it?  Thank you!

  If the test computer worked then no there is no need to replace the core.

• The virtual machine migration and maintenance mode

  Hello

  When I go into maintenance mode, DRS intervenes and begins to migrate my virtual machines.

  He made only 2 virtual machines at once.

  This number can be increased?

  Thanks in advance,

  Ronen.

  Hi Ronen, take a look at this: http://www.boche.net/blog/index.php/2009/01/05/guest-blog-entry-vmotion-performance/

  Saludos/looks

  Nicolas Solop

  Buenos Aires, Argentina

  -

• back-to-back connection between two virtual machines on different ESXi servers

  Assume that a name of Virtual Machine VM1 is on ESXi Server 1 and Virtual Machine name is VM2 exist on ESXi Server 2.

  We can configure two Virtual Machines back to back as connect us two physical machine back to back via cross cable. is this possible?

  Sorry for typo's fault, should be separated vswitch, with dedicated physical network card adapter

• All virtual machines on my ESX host off power at the same time

  Hi all

  Recently I attend the interview. a guy asked me this question

  < police = "Times New Roman, serif" >all virtual machines on my power off ESX at the same time host < / police >< / police >?

  What was the cause of the highest of the error, how to troubleshoot the error.please me.anybody guide to address this problem?

  Thanks

  Surya

  If all the virtual machines if lower at the same time, my bet would be VMware HA. Just for fun, build it inside your head:

  (1) 8 ESX nodes, all service consoles connected to a unique management switch.

  (2) now to create a cluster of these nodes, put all your virtual machines in there and activate HA, choose ' host isolation response: power off.

  (3) draw power from your management switch. HA on each host will deduct that the host is isolated-> turn off all the virtual machines.

  Each host will think the same thing, and hop find you with all virtual machines down to the time in the whole of the cluster. Have seen this one several times when people go and upgrade their management switches in the evening ("hey, it's only management").

  Visit my blog at http://www.vmdamentals.com