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• faking NAT with a VMware distributed switch across multiple hosts

  - by romant

  Have a VM that will act as the router, and will be connected to both networks (NAT + 'real'). I spread the distributed switch across the hosts, although any VM that is not on the same physical host as the router/dhcpd simply doesn't get an IP. So its obviously my dvSwitch config. Has anyone achieved a NAT solution using a dvSwitch before that they could share?! Thanks.

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• Access denied on virtual machine

  - by newbie

  I have a friend on the same network as me hosting a virtual machine using vmware server.The guest OS is Windows 7 and Windows Server 2003.He granted me administrative priveleges for the machine but when i try to add a user to that VM it says access denied. Moreover when i try to start the VM remotely using the command vmrun -T server -h https://computer-name.domain.com:8333/sdk -u domain/user -p passwd start "[standard] Win2k3Client1/Win2k3Client1.vmx" This shows unsufficient priveleges on host operating system but i am able to login with same username password on VMWare Web Access

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• Free memory on linux [closed]

  - by Julia Roberts

  Possible Duplicate: Meaning of the buffers/cache line in the output of free What would be a good setting to free memory on linux? I have 8GB but gets used up so fast. current settings: kernel.sched_min_granularity_ns = 10000000 kernel.sched_wakeup_granularity_ns = 15000000 vm.dirty_ratio = 40 kernel.pid_max = 4096 vm.bdflush = 100 1200 128 512 15 5000 500 1884 2 What settings would I need so linux frees old ram faster?

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• How can I copy a Virtual Machine on VMWare ESXi 4 while maintaining Thin Provisioning?

  - by Billy ONeal

  We have an ESXi host we use for testing, which results in a ton of VMs being created and copied on a regular basis. We don't have the storage capacity to use thick provisioned VMs on this server, and have been maintaining the copies using VMWare Converter. But using the converter is an incredibly slow operation which copies the entire contents of the VM over the network several times before actually finishing the copy. Is there a way to simply clone the VM but maintain the thin-provisioning?

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• Why is it possible to deploy a hypervisor within a hypervisor?

  - by blade3

  Hi, Why is that a hypervisor, which alledgedly needs to be on physical hardware, can be deployed within a VM? For example, XenServer (the actual hypervisor) can be deployed in an ESX VM? Why is this possible (Although not a good idea for many reasons, but still works). Also, why do people say a hypervisor needs physical hardware (from an architectural point of view, rather than obvious performance reasons). Thanks

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• Forgotten account password

  - by blade

  I kept my passwords recorded but the location on my PC where I kept this went missing. I now can't get into Windows Server 2008 R2 as I can't remember the administrator or named account credentials and have no password reset disk. This is on a VM (VM Player - which btw is temp till I get Hyper-V). How can I get back in? If I make AD can I join the server to AD and then set a domain account?

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• Optimizing memory usage across multiple similar VMs

  - by zildjohn01

  Let's say I have four VM's open, each running an identical version of Windows. Under my current setup, the guest OS will be loaded into memory four times. Much of that is wasted space. Using any VM host on the market, is there any way to consolidate that memory usage?

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• Virtual Hard Drive not booting - VMWare

  - by Chloraphil

  I have a .vmdk (VMWare hard disk) file that I cannot use as the lone disk in a new virtual machine. If I attach it to an existing virtual machine then it works fine. It has Windows Server 2003 on it. When I attempt to boot the new VM it attempts a network boot. EDIT: VMWare Workstation 6.5 I could not find a PXE option in the settings, and I did look in the VM config file for "PXE" but did not find one.

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• Has anyone achieved true differential sync with rsync in ESXi?

  - by Julius

  Berate me later on the fact that I'm using the service console to do anything in ESXi... I've got a working rsync binary (v3.0.4) that I can use in ESXi 4.1U1. I tend to use rsync over cp when copying VM's or backups from one local datastore to another local datastore. I've used rsync to copy data from one ESXi box to another but that was just for small files. In now trying to do true differential syncs of backups taken via ghettoVCB between my primary ESXi machine and a secondary one. But even when I do this locally (one datastore to another datastore on the same ESXi machine) rsync appears to copy the files in their entirety. I've got two VMDK's totally 80GB in size, and rsync still takes anywhere between 1 and 2 hours but the VMDK's aren't growing that much daily. Below is the rsync command I'm executing. I am copying locally because ultimately these files will get copied onto a datastore created from a LUN on a remote system. Its not an rsync that'll be serviced by an rsync daemon on a remote system. rsync -avPSI VMBACKUP_2011-06-10_02-27-56/* VMBACKUP_2011-06-01_06-37-11/ --stats --itemize-changes --existing --modify-window=2 --no-whole-file sending incremental file list >f..t...... VM-flat.vmdk 42949672960 100% 15.06MB/s 0:45:20 (xfer#1, to-check=5/6) >f..t...... VM.vmdk 556 100% 4.24kB/s 0:00:00 (xfer#2, to-check=4/6) >f..t...... VM.vmx 3327 100% 25.19kB/s 0:00:00 (xfer#3, to-check=3/6) >f..t...... VM_1-flat.vmdk 42949672960 100% 12.19MB/s 0:56:01 (xfer#4, to-check=2/6) >f..t...... VM_1.vmdk 558 100% 2.51kB/s 0:00:00 (xfer#5, to-check=1/6) >f..t...... STATUS.ok 30 100% 0.02kB/s 0:00:01 (xfer#6, to-check=0/6) Number of files: 6 Number of files transferred: 6 Total file size: 85899350391 bytes Total transferred file size: 85899350391 bytes Literal data: 2429682778 bytes Matched data: 83469667613 bytes File list size: 129 File list generation time: 0.001 seconds File list transfer time: 0.000 seconds Total bytes sent: 2432530094 Total bytes received: 5243054 sent 2432530094 bytes received 5243054 bytes 295648.92 bytes/sec total size is 85899350391 speedup is 35.24 Is this because ESXi is itself making so many changes to the VMDK's that as far as rsync is concerned the entire file has to be retransmitted? Has anyone actually achieved actual diff sync with ESXi?

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• VMWare Server guest cannot browse web on Win2008 host

  - by LachlanG

  Cannot browse the web from the guest VM. Host Windows 2008 R2 web edition Fresh install default firewall settings unchanged VWare server 2.02 Can ping external sites Can resolve DNS hostnames Can browse web Guest VMware NAT networking Win 2000 server No firewall Can ping external sites Can resolve DNS hostnames "Page cannot be displayed" errors when browsing web Could previously browse web when Guest VM run on Win2003 host

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• Suggestions for splitting server roles amongst Hyper-V virtual servers / RAID6 or RAID10? / AppAssure

  - by Anon

  We have 2 Hyper-V hosts at present running 1 virtual server that was converted from a physical box running all roles. My plan is to split the roles over various virtual machines, upgrading to the latest software versions as I go, and use the backup server as a standby in case the main server fails. AppAssure backup software has a feature called Virtual Standby, so the VHD's can be ready to be fired up on the backup server if necessary. Off-site backups will be done via external USB drive for now. I'm just seeking some input/suggestions into how I'm planning to split the roles out amongst various virtual servers. Also, I'm curious how to setup the storage on the servers. We do not have any NAS's, SAN'S or any budget for this. What would the best RAID level be to use? I'm thinking either RAID6 (which is currently used) however I'm concerned about the write speeds, or RAID10 but again I'm worried that I can only lose 1 drive (from the same mirror) as opposed to any 2 with RAID6. I realise I have a hot swap for this, but what if a further drive fails during a rebuild? Is the write penalty of RAID6 worth the extra reliability over RAID10? Or will it be too slow with all the roles I am planning, therefore RAID10 is my only real option? The reason for the needed redundancy is I am the only technician and I'm not always on-site. Options I've considered: 1) 5 drives in RAID6 set, 200gb for host OS, rest for VM storage. 1 drive for hot swap - this is how it is currently setup 2) 4 drives in RAID10 set, 200gb for host OS, rest for VM storage. 2 drives for hot swap 3) 4 drives in RAID10 set for VM storage, 2 drives in RAID1 set for host OS. No drives for hot swap - While this is probably the best option with the amount of drives I have, I don't like the idea of having no hot swap 4) 3 drives in RAID6 set for VM storage, 2 drives in RAID1 set for host OS. 1 drive for hot swap All options give us enough storage capacity for our files, etc. We don't have any budget for extra drives or extra hot swap HD chassis for the servers. We have about 70 clients and about 150 users. MAIN SERVER Intel Xeon 5520 @ 2.27 GHz (2 processors) 16GB RAM 6 x 1TB Seagate Barracuda ES.2 Enterprise SATA drives Intel SRCSATAWB RAID controller Virtual machine workload using Hyper-V on Windows Server 2008 R2: DC01 - Active Directory Domain Controller / DNS server / Global catalog - 1GB RAM DC02 - Active Directory Domain Controller / DNS server / Global catalog - 1GB RAM Member Server - DHCP server, File server, Print server - 1GB RAM SCCM Member Server - 4GB RAM Third Party Software Member Server - A/V server, Ticketing software, etc - 4GB RAM Exchange 2007 - 4GB RAM - however we are probably migrating to a hosted solution, therefore freeing up resources BACKUP SERVER Intel Xeon E5410 @ 2.33GHz (2 processors) 16GB RAM 6 x 2TB WD RE4 SATA drives Intel SRCSASRB RAID controller Virtual machine workload using Hyper-V on Windows Server 2008 R2: AppAssure backup software - 8GB RAM

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• VMware Fusion disk size

  - by churnd

  I have a Windows XP x64 install in VMware Fusion. The amount of space that the VM reports as used (C:) is ~20GB. However, the amount of space the VM is taking up on my disk is 30GB. Why the inconsistency? I do not have autoprotect enabled, nor do I have any snapshots I'm aware of. I have defragmented the drive and used Drive Cleanup from the VMware settings.

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• Vmware cpu allocation for a spiking database server

  - by user1552172

  I have a database server with many poorly written queries that causes the sql server to spike then drop constantly ( a massive start from scratch is happening). I need to know if the cpu allocation on the vm to expand as needed is best practice for a case like this. I am wondering if the esxi platform cant expand as fast as the spikes happen. I am curious what is best practice for vm cpu allocation on sql server (with horribly written queries)

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• Can SetMaxMemory parameter be set on Windows VMs at a Xen Host

  - by diegodias

  I am trying to instantiate VMs with maxmemory higher than the current memory. It works fine with Linux vms, but when I try to instantiate a windows VM, the VM always crash. Can I set this parameter for windows VMs?

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• How do I create a bridged virtual network for libvirt+KVM+ubuntu-server the easy way?

  - by Arthur Ulfeldt

  I see lots of documentation on how to manually set up a network bridge and then manually add vm's tun devices to these bridges and then write a shell script that glues it all together. lots of work, very manual, and not impressive. On the other hand if you want to use NAT to KVM+libvirt VMs to the network you just click the new network button in the virt-manager gui and relax. Am I missing "the easy way" of causing a VM to share the physical network with the host?

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• ESX Root User Cannot Reboot Server

  - by jamesthigpen

  I have a machine running ESX v3.5 and the root user is unable to perform tasks like shut down the esx server, create new VM's, manage roles, pretty much everything except for starting and stopping VM's. How do I (re)set these permissions?

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• VMware server 2.0 SYN/ACK repeating issues

  - by user65579

  VMWare Server 2.0.0 Build 122956 I am having some issues with connecting into a guest VM (Ubuntu linux 4.4.3-4 lucid) running under VMware 2.0 on a windows server host. All connections to and from the VM's work fine, except for FTP. I thought the issue was the FTP daemon at first but it has been ruled out that it is not the daemon or the server itself. When you try to connect to the FTP server from outside of the host OS it fails with a "421 Service not available" but when you try and connect from the local VM or from the host OS the connection goes through fine. I have ran many packet sniffs using wireshark/tcpdump from the VM, the host OS, and the client connecting, the most informative is the host OS. I have attached a PNG of the relavant packets that were captured. I viewed some other network traffic that was sniffed (WWW specifically) and it seems to do the same syn/ack repeating but the user doesnt see any issues. I have disabled the firewall and the issues persisits, I have tried with specific allow rules to ensure the data is allowed and no changes. It appears like VMware attempts to do the ICMP redirect and it works, but then it vmware repeats the packets sent so you get 3 syn/ack's for every one syn from the client. Also VMWare appears to be attempting to establish an FTP connection between the HOST OS and the GUEST OS, because I see the second SYN sent from the HOST OS to the GUEST to initiate a new connection, and it get the appropriate SYN/ACK followed by an ACK, but the client never sees any of this from its end. EG. syn from client syn/ack from host OS to client syn/ack from guest OS to client syn/ack from host OS to client The same thing happens when the connection reset is attempted, RST's start being sent and repeated, the server responds with a valid header to continue the FTP handshake but the RST acknowledgement is allready issued and things are closed. I am not 100% if this is a bug in VMware or possibly a VMNetwork missconfiguration. Does anyone have any thoughts on where exactly the issue could be, things to try to verify or rule out? I have linked to a picture of the relevant packets sniffed from the host OS. http://img18.imageshack.us/img18/7789/vmwareftpconnection.jpg

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• Windows HPC Server 08 suitability for Matlabs

  - by blade

  I want to setup another Hyper-V VM for installing Matlabs/doing some compute-intensive programming using C. I keep thinking that Windows Server HPC 2008 is designed for this sort of work. Would I be on the right track to setup a single VM with this OS and install this software? Or is HPC more for grid/distributed computing? Thanks

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• RAW Device mappings

  - by Setesh

  I am new to ESXi, I am going to be using a hard disk attached to my VM with Raw device mappings that connects back to our SAN. What are the recommended options to choose? Where to store the LUN mappings, on the VM or with the Datastore? What compatibility mode to use physical or virtual? We are going to be using this for database server in our dev environment.

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• virtual machine doesn't recognise ip of the Machine it run on

  - by Muky

  Hi I am using virtualBox to create a virtual XP machine on my XP using Bridge connection. From my VM I am able to ping to any other IP on the network except for the IP which the VM is run on. any idea?

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• How to change machine name on TFS 2010 RC?

  - by Ross Johnston

  I'm trying to rename the TFS 2010 RC VM machine name so I can add it to our domain without the chance of clashing with another copy of the VM already on the domain. I found instructions for TFS 2008 saying to use TFSAdminUtil ActivateAT , but this tool has now been replaced by TFSConfig and I can't see an obvious replacement for 'ActivateAT'. Any ideas what the new command should be?

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• How Do I Disable Windows 7 Accessibility Apps?

  - by 5arx

  I want to permanently disable or remove Magnifier, Narrator, On-Screen Keyboard and High Contrast or at least permanently disable their keyboard shortcuts. I'm using Win7 inside a Parallels VM with an old IBM keyboard (SpaceSaver II) and USB/PS2 adaptor. Despite all my best efforts to customise the keyboard for the VM, the accessibility shortcuts activate almost by themselves at critical times :-( Can anyone help?

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• How Do I Disable Windows 7 Accessibility Apps?

  - by 5arx

  I want to permanently disable or remove Magnifier, Narrator, On-Screen Keyboard and High Contrast or at least permanently disable their keyboard shortcuts. I'm using Win7 inside a Parallels VM with an old IBM keyboard (SpaceSaver II) and USB/PS2 adaptor. Despite all my best efforts to customise the keyboard for the VM, the accessibility shortcuts activate almost by themselves at critical times :-( Can anyone help?

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• Virtual Hard Drive not booting - VMWare

  - by Chloraphil

  I have a .vmdk (VMWare hard disk) file that I cannot use as the lone disk in a new virtual machine. If I attach it to an existing virtual machine then it works fine. It has Windows Server 2003 on it. When I attempt to boot the new VM it attempts a network boot. EDIT: VMWare Workstation 6.5 I could not find a PXE option in the settings, and I did look in the VM config file for "PXE" but did not find one.

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• Configuration to point an X tty to a separate system?

  - by buu700

  Specifically, I have an Ubuntu 10.04 system with a headless Ubuntu 12.04 virtual machine, and I'm looking for a way to have it set up so pressing ctrl+alt+F8 will take me into another X client which is connected to an X server on the vm (with gdm appropriately displayed at startup, etc.). As in, my startup script should spin up the headless machine and then immediately perform a "startx" pointed at the vm.

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