NFS datastore

Similar Questions

• Is it possible create Oracle RAC on NFS datastore?

  Hello

  Is it possible create Oracle RAC on NFS datastore?   With the VMFS data store, we use VMDK files as the Oracle RAC shared virtual disks with the Comptrollership and multi-writer SCSI Paravirtual, what about the NFS datastore? is the controller SCSI Paravirtual and writer multi function supported on the NFS datastore?

  Unless I'm missing something, this is not supported on NFS.

• NFS datastore = > no host not connected, impossible to remove

  Hello

  I have a NFS datastore (it was an ISO repository), I need to delete.   So I deleted all records from this share

  My problem is I disassembled it all hosts and the data store is still visible in my inventory and I am unable to remove it.

  When I try "Datastore Mounte to... additional host", the Wizard run in an endless loop and does not load the list of hosts.

  On my hosts, the NFS share is not visible. So nothing stuck because of a file in use.

  Have you already encountered this problem?

  Sorry found the culpit... instant on the virtual machines (with mapped CD-ROM).

• For NFS Datastore vSphere alarms

  So I would like to create an alarm that corresponds to a (not state) event that fires when a NFS data store is disconnected.  I found the trigger "Interruption of the connection to the NFS server", but it doesn't seem to work at all.  Also, I would only triggers the action when the host is not in Maintenance Mode, because that would be very annoying for an outgoing call because a host has restarted for patches and generated alarm type disconnected "NFS Datastore.

  use triggers esx.problem.storage.apd. *.

  When NFS disconnects you will get official messages in the file vmkernel.log on the host

• Windows do not install ISO in the NFS datastore

  Hi all

  I searched this forum for a few days and tried to suggestions from different positions without success. I recently installed ESXi 5.1 update 1. I have setup a NFS datastore on the same computer by using a USB external hard drive. I was able to install RHEL6 using an iso from the NFS data store. The problem is that I can't install Windows by using an iso of Windows 7. Whenever the virtual computer is booted, it aims to achieve crashes and boot TFTP. No iso standard is detected. I tried the following:

  1. guaranteed 'Connected' and 'Connect at Power On' options for CD/DVD are verified. However, I have noticed that when the virtual machine starts, the 'Connected' for Windows option becomes not controlled. This is not the case for the Linux VM.

  2. change the boot order in BIOS to the first boot from CD/DVD.

  3. uncontrolled ' connect at power on "for network adapters.

  Even after these changes, VM trying to do a start-up network and TFTP.

  The next thing I did:

  4 network cards removed from the BIOS (by changing configuration).

  For the moment, VM does not network boot attempt, but complains that the operating system was not detected.

  Few details on the NFS datastore:

  1. 1 TB external USB with 2 Configuration of partitions ext4 as an NFS share to the RHEL6 server on the same machine.

  2. NFS configured correctly because I can install from an iso RHEL6 very well.

  Am I missing something? Nothing wrong with iso of Windows. I used it elsewhere. Also tried a different iso Windows without success. Help, please. Thanks in advance for your time.

  Kind regards.

  As the ISO for the operating system files are big and sometimes take a considerable amount of clusters on the hard drive make a control office (or a scan of the drive) can fix corrupt ISO file. and to make sure that your ISO is not corrupted try to open it with Winrar and extract a file from it.

  Yours,
  Mar Vista

• Cannot remove/remove NFS datastore because its use, but is not

  I am trying to remove an old NFS data store, but I get an error message saying that it is in use. I find the virtual machine that he believes is used, stepped through all the parameters of the virtual machine and there is nothing pointing to this NFS datastore. I also tried to remove the store of data from the command line using 'esxcfg-nas - d < NFS_Datastore_Name >. That returned an error saying "unknown, cannot delete file system. Even 30 minutes before I was access and moving data out of this data to another ESX host store. I don't know what else to try. Can someone please help?

  It also still shows up on top of the virtual machine as used storage an idle...

  The virtual machine has an active overview that was created while the virtual machine was on the NFS datastore?

  André

• slow writes - nfs datastore

  Greetings.

  I note that some write throughput problems I see with a based NFS datastore. Seems I'm not the only one who is seeing this, but so far have given little information in making it better.

  Try the update of ESXi V4 1 on a Poweredge T110 with 4 GB of memory, xeon X 3440 CPU and 1 250 GB sata drive.

  The NFS is based datastore served a machine of OpenSUSE 11.2 on a network of 1000Mb and speed and duplex has been verified to be correctly set on both machines.

  Initially I converted a server image OpenSUSE 11.2 VMware VMware ESXi server (12 GB) in a based NFS data store. It worked, but was incredibly slow, medium flow 2.7 MB/sec.

  Once, I found 3 MB/s writing was everything that I have the NFS datastore using jj. I tried both leave within the virtual machine and also in the ESXi console to the same store location.

  Performance of network using iperf, shows ~940mb/s between the virtual machine and the NFS server so when drives are out of the way, the net is doing well.

  I ended up changing the following advanced settings to see if it is any kind of problem memory buffer;

  NFS.maxvolumes to 32

  NET.tcpheapsize to 32

  NET.tcpheapmax to 128

  Which seem to help, access write from the virtual machine to the NFS data store went from 3 MB/s to 11 MB/s - 13 MB/s. So, there is certainly some slowdowns self-imposed via the default settings are defined.

  Tried to mount the NFS datastore even directory directly as / mnt in the virtual machine hosted and low and write to/mnt watch throughput ~ 25 Mbps. do the same exact command to another linux only box on the same network that I see about the same rate with the stand-alone server see about 2 MB/s more so no problem there.

  I suspect that there may be other elements in which the ESXi NFS based datastore is 50% less efficient than straight NFS. Have other any golden treats to try to obtain the ESXi storage NFS write speed up to something similar to what can be done with native NFS mounted in the virtual machine?

  TIA

  Check the mounting options on underlying partition, for example by the file system,

  -ext3 - rw, async, noatime

  -xfs - rw, noatime, nodiratime, logbufs = 8

  -reiserfs - rw, noatime, data = writeback

  Then export options use (rw, no_root_squash, async, no_subtree_check)

  Check that the IO Scheduler is correctly selected based on underlying hardware (use a rewrite if material noop).

  Increase the NFS threads (if 128) and Windows TCP to 256K.

  Finally ensure comments partitions are 4K aligned (this should not affect sequential performance well).

  I worked on a few notes on NFS, which cover all of this (not complete yet): http://blog.peacon.co.uk/wiki/Creating_an_NFS_Server_on_Debian

  HTH

  http://blog.peacon.co.UK

  Please give points for any helpful answer.

• Poor ESXi 4 NFS Datastore Performance with various NAS systems

  Hello!

  In testing, I found that I get between a half and a quarter of the e/s inside a guest performance when ESXi 4 systems connect to the using NFS data store if the clients connect to the exact same NFS share.  However, I don't see this effect if the data store using iSCSI or local storage.  This has been reproduced with different systems running ESXi 4 and NAS systems.

  My test is very simple.  I created naked CentOS 5.4 minimum installation (completely updated 07/04/2010) with VMware Tools loaded and the creation time of a file of 256 MB using jj.  I create the file on the root (a VMDK stored in different data warehouses) partition or a directory of the NAS mounted via NFS, directly in the comments

  My crucial test configuration consists of a single test PC (Intel 3.0 GHz Core 2 Duo E8400 CPU with a single Intel 82567LM-3 Gigabit NC and 4 GB RAM) running ESXi 4 connected to a printer HP Procurve 1810 - 24 G, which is connected to a VIA EPIA M700 NAS system running OpenFiler 2.3 with two 1.5 to 7200 tr / MIN SATA disks configured in front of software RAID 1 and dual Gigabit Ethernet NIC.  However, I have reproduced it with different ESXi PC and NAS systems.

  This is a release of one of the tests.  In this case, the VMDK is a store of data stored on the NAS via NFS:

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 0,524939 seconds, 511 MB/s
  Real 0m38.660s
  user 0m0.000s
  sys 0m0.566s
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,69747 seconds, 30.9 MB/s
  Real 0m9.060s
  user 0m0.001s
  sys 0m0.659s
  mnt root@iridium#.

  -

  ---

  The first dd is a VMDK stored in a connected via NFS data store.  The dd ends almost immediately, but the synchronization takes nearly 40 seconds!  It's less than 7 MB per second transfer rate: very slow.  Then I get the exact same NFS share that ESXi is used to store data directly in the comments and repeat the DD.  As you can see, the SD is longer and the synchronization takes no real time (as befits a NFS share with active sync), and the whole process takes less than 10 seconds: this is four times faster!

  I don't see these results on data warehouses mounted via NFS.  For example, here is a test on the guest even running from a mounted via iSCSI data store (using the exact same SIN):

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 1,6913 seconds, 159 MB/s
  Real 0m7.745s
  user 0m0.000s
  sys 0m1.043s

  
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,66534 seconds, 31.0 MB/s
  Real 0m9.081s
  user 0m0.001s
  sys 0m0.794s
  mnt root@iridium#.

  -

  ---

  And the same comments linking internal SATA drive of the PC ESXi:

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 6,77451 seconds, 39.6 Mbps
  Real 0m7.631s
  user 0m0.002s
  sys 0m0.751s
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,90374 seconds, 30.1 MB/s
  Real 0m9.208s
  user 0m0.001s
  sys 0m0.329s
  mnt root@iridium#.

  -

  ---

  As you can see, the performance of NFS direct comments for each of the three are very consistent.  ISCSI and the performance of the store local data disk are both a bit better than that - as I expect.  But the mounted via NFS data store gets only a fraction of the perfomance of the any of them.  Obviously, something is wrong.

  I was able to reproduce this effect with an Iomega Ix4 - 200 d as well.  The difference is not as dramatic, butalways important and consistent.  Here is a test of a guest of CentOS using a VMDK stored in a data store provided by an Ix4 - 200 d via NFS:-.

  root@palladium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 11,1253 seconds, 24.1 Mbps
  Real 0m18.350s
  user 0m0.006s
  sys 0m2.687s
  root@palladium /# mount/mnt 172.20.19.1:/nfs/VirtualMachines
  root@palladium /# cd/mnt
  synchronization of the # mnt root@Palladium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 9,91849 seconds, 27.1 MB/s
  Real 0m10.088s
  user 0m0.002s
  sys 0m2.147s root@palladium mnt-#.

  -

  ---

  Once more, the direct NFS mount gives very consistent results.  But using the diskette provided by ESXi on a mounted NFS datastore gives still worse results.  They are not as terrible as OpenFiler test results, but they are constantly between 60% and 100% longer.

  Why is this?  What I've read, NFS performace is supposed to be within a few percent of the iSCSI performance, and yet I see between 60% and 400% worse performance.  And this isn't a case of the SIN is not able to provide correct NFS performance.  When I connect to the NAS via NFS directly inside the guest, I see much better than when ESXi connects to the same NAS (the same proportion!) via NFS.

  The configuration of ESXi (network and network cards) is 100% stock.  There is no VLAN in place, etc., and ESXi system has only one

  Single Gigabit adapter.  It is certainly not optimal, but it doesn't seem to me to be able to explain why a virtualized guest is able to get a lot better performance NFS as ESXi itself to the same NAS.  After all, they both use the same exact suboptimal network configuration...

  Thank you very much for your help.  I would be grateful any idea or advice, you might be able to give me.

  Hi all

  It is very definitely a performance O_Sync problem. It is well known that NFS VMware shops still use O_Sync for writes little matter what share put for a default value. VMware uses a custom file locking system so you really can't compare it to a normal NFS share connection to a different NFS client.

  I have validated that the performance will be good if you have an SSD cache or storage target with enough reliable battery backup.

  http://blog.laspina.ca/ubiquitous/running-ZFS-over-NFS-as-a-VMware-store

  Kind regards

  Mike

  vExpert 2009

• Moving to VM - NFS Datastore - no vmotion - invalid

  Hey people,

  Having a problem here to move a virtual machine from one ESX host to another (with VC).  First of all, let me tell you that I don't have vmotion (working on fixing that), but I have no shared storage (NFS datastore).

  If the virtual machine is hosted by esx1 on this NFS data store.  I stop the virtual machine and remove it from the inventory.  Then, I go to esx2 and browse the data store.  Find the vmx file and add to the inventory.  Then, the virtual machine appears in the inventory, but is grayed out with (invalid) beside him.

  I'm sure I could add a new virtual machine and use the existing vmdk files like discs, but I would rather simply add to the inventory with the existing configuration.

  Is this possible?

  Thank you very much

  Grant

  -

  ---

  Without vmotion you should always be able to migrate cold the VM - Power Down the VM - right click on the virtual machine name, select migrates - select another ESX host - you can change the storage or leave it where it is at.

  This will allow to get cold migrate the virtual computer with the ing to remove and re add to the inventory of VC.

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• Adding NFS Datastore for all guests

  I would add a NFS data store to all my guests who are spread across different data centers in vCenter. Is there anyway I can change this script to make it work... with a list of all hosts or maybe a list of data centers.
  We have more than 50 domain controllers and I Don t want to have 50 different Scriptures

  # The user variables: adjusted for the environment

  ###################################

  # Load VMWare supplements

  If (-not (Get-PSSnapin VMware.VimAutomation.Core - ErrorAction SilentlyContinue)) {}

  Add-PSSnapin VMware.VimAutomation.Core

  }

  # Define the location of the file of credentials

  $credsFile = "C:\Scripts\creds.crd".

  # import credential file

  $Creds = get-VICredentialStoreItem-file $credsFile

  # Datacenter name

  $datacenterName = "Ourdatacentername".

  # NFS host IP

  $nfsHost = 'xx.xx.xx.xx.

  # Name of the NFS share

  $nfsShare = "oursharename".

  # New data store name

  $nfsDatastore = "temp".

  ####################################################################################################################

  # Start of execution

  ####################################################################################################################

  #connect to vCenter using credentails provided in the credentials file

  SE connect-VIServer-Server $Creds.Host-$Creds.User username-password $Creds.Password - WarningAction SilentlyContinue | Out-Null

  echo "connected to vCenter.

  echo "adding to ESXi hosts to start NFS share.

  foreach ($esx in data center-get-name $datacenterName | get-VMhost | name to sort)

  {

  $esx | New datastore - Nfs - name $nfsDatastore - NFSHost $nfsHost - $nfsShare path

  echo 'Sharing NFS added to $esx'

  }

  echo "completed."

  Disconnect-VIServer-Server $Creds.Host - force - confirm: $False

  Try the attached script

• What is the largest file VMDK, that you can create on a NFS datastore?

  Hello

  I can't find the answer to this question anywhere. I know that the largest file on a VMFS datastore vmdk is 2 TB, but this applies to NFS?

  Thanks in advance.

  Scott

  for single VMDK, it should be the same that is 2 TB - 512 b

  Craig

  vExpert 2009

  Malaysia, VMware communities - http://www.malaysiavm.com

• Cannot remove NFS datastore

  I noticed that there is a duplicate nfs data store appear on one of my ESX hosts.  When I try to remove the client from dastore the VI throws an error stating that "the object has already been deleted or was not completely created" too, I can browse the data in double fine store.  Vcenter restart I tried and that did nothing.

  vCenter gets its information from the ESX host, I guess you tried to update the display of storage?

  You can try to refresh the information in ESX datastore and see if these information to propagate to vCenter, try to do both:

  [root@himalaya ~]# vmware-vim-cmd hostsvc/datastore/refresh 
  

  If it still does not work, a quick fix is to restart the agent on the ESX host management by:

  service mgmt-vmware restart
  

  This should force an update and storage information should be correct later.

  =========================================================================

  William Lam

  VMware vExpert 2009

  Scripts for VMware ESX/ESXi and resources at: http://engineering.ucsb.edu/~duonglt/vmware/

  repository scripts vGhetto

  VMware Code Central - Scripts/code samples for developers and administrators

  http://Twitter.com/lamw

  If you find this information useful, please give points to "correct" or "useful".

• NFS datastore on vCenter ESXi hosts

  I'm running out of space on our NAS storage.

  Another unit would be very costly.

  It seems easy enough to add an another data store from an NFS share.

  Are there problems I should be aware of if I were to add an NFS share from a physical windows 2008R2 Server?

  I understand that, since the part is right on a SATA drive performance will be bad enough.

  I was thinking more just for backup.

  Snapshots can be taken of vm that are located on a store of data VMFS5 and stored in a NFS data store?

  There will be problems with the addition of shared NFS of different targets to the ESXi hosts.

  However, put pictures on different levels is not a good idea. Snapshots in VMware products function as a string. When you create a snapshot, delta / only modified data is written and read in the snapshot files / delta. The parent files are still used, but opened in read-only mode.

  Remember, a snapshot is not a backup!

  André

• Issue of NFS Datastore

  
  Hello

  We have a couple of ESX clusters which, for the most part, connect to FC storage. However, we also connect to a single NFS store, hosted by a Windows Server in their respective site.

  Site1ESXCluster connects to the Site1WinNFSStore

  Site2ESXCluster connects to the Site2WinNFSStore

  Last week we had network problems that appear to have been shared NFS become inactive on the ESX hosts:

  

  I assumed that the servers are entered ODA and them restarted but still no luck.

  I disassembled the and tried to link, but I get this error:

  

  Windows servers receive the request and respond to the event log with "mount operation managed to < ESXIP >.

  If I try to add NFS Site1WinNFSStore to Site2ESXCluster, it works fine. And vice versa. But they will just not connect to stores they once had.

  I also connected a host ESX cluster no at the end store.

  There is no limitation of access on the store NFS on Windows servers.

  It is alsmot, as if the ESX host refuses to connect to a store once problem!

  Any ideas?

  I know it sounds crazy, but you have restarted windows NFS servers.

  I had a similar problem with NFS windows shares using a Centos 6.4 mounting box.

  In this case, a loss of network connectivity caused a stale mount on Centos system.

  The best way to clean is to restart the system Centos and windows NFS server.

  If you haven't tried it, so it can be worth a go.

  Concerning

• Rename the NFS datastore?

  I have asked me if there is any problems with renaming data NFS - specifically the situation, warehouses is that the naming convention used these people to NetApp volumes/exports resulted in data duplicate store names - when they are in the vSphere client, it is impossible to determine the name what netapp resources a particular data store matches.

  -Can they just 'Rename' these data storage? without risking problems?

  And a related question: data store name must be the same on each host? So I mean, suppose that:

  NetApp flight = nfsvol1, export = nfsvol and the data store has been nfsvol1

  It is also possible to rename the data host 1 store (then maybe it becomes host1_nfsvol1) and then vol2 (so that it is called host2_nfsvol1)?

  Evening,

  All storage media use a uuid identifier.  The name of the data store, you can see if a friendly name creates for you (as long as you're in 4.0 or later).  So the answer is you can rename them without effect.  The data store name is not used by vmware, that it is used by you and scripts that you create.

  -Can they just 'Rename' these data storage? without risking problems?

  Yes you can rename them without any problem as long as your scripts / documentation / automated processes that are created by the user do not need to be named something.

  is the name of the data store must be the same on each host?

  Not because vmware uses the uuid that is the same on each host.

  It is also possible to rename the data host 1 store (then maybe it becomes host1_nfsvol1) and then vol2 (so that it is called host2_nfsvol1)?

  You can, but if they are shared between host1 and host2 your forces want the name to be the same to avoid confusion.  It's a personal choice.

  Please let me know if you have any additional questions.

  Thank you

• NFS datastore on does not create the thick disk

  Hi Experts

  We have 4 and 5 from esx esx in our workplaces.

  I observed something strange with ESX 5, we cannot create thick disk for VM on NFS data warehouses

  While the same was collaborating with ESX 4. I'm still able to create thick disk using the same NFS volume.

  Nothing has changed in ESX 5.X? which does not allow users to create thick disk in NFS.

  Srinivas-

  NFS data with hardware acceleration warehouses and VMFS data storages are supported the following political drive of provisioning. On NFS warehouses that do not support hardware acceleration, that thin format is available. Link