move on to the Round Robin

Similar Questions

• Change the path to the Round Robin of the newest storage used

  Dear Experts,

  For one of our guests (on two hosts total), which is presented with two data warehouses:

  -Storage 1 (works with RoundRobin vmware)

  -Storage 2 (works with most recent used vmware)

  I need to know if I can change it so that things work and there are two VM in this data store 'storage 2'.

  All the foregoing gave two data warehouses are working with (Round Robin vmware) with host 2nd in our environment

  Please notify

  Just did on one of the used data stores. No problems.

  Just follow this Article

  VMware KB: Changing the path information for ESX ESXi hosts to access

• Location of the table "Data store path Selection" database and input valid value for the Round Robin

  Long history, work paths peripheral to the equivalent of "Round Robin" (VMware) programmictally change as seen in vCenter - Volume Properties-> manage-> trace selection policy paths.

  Struggling to get the value to change through scripts. Think that it requires the value as expected in the datamodel vcenter. Find it by inspecting the paintings have not yet

  Thanks in advance

  The values on the parameter - MultipathPolicy are: fixed, MostRecentlyUsed, RoundRobin, unknown

  This changes all policies to roundrobin on a specific host

  Get-VMHost  | Get-ScsiLun -LunType disk |  Set-ScsiLun -MultipathPolicy "roundrobin"
  

  ____________

  Blog: LucD notes

  Twitter: lucd22

• Set Default PSP Round Robin ESXi 5.0U1

  This used to work on vSphere4, but does not seem to work now

  $esxCli = Get-EsxCli
   $esxCli.nmp.satp.setdefaultpsp(“VMW_PSP_RR”, “VMW_SATP_DEFAULT_AA”)
  
  Error:
  You cannot call a method on a null-valued expression.
  At C:\Documents and Settings\tclavell\Local Settings\Temp\3\f86a383f-6bcb-4426-
  887f-d8534bc291a1.ps1:3 char:31
  + $esxCli.nmp.satp.setdefaultpsp <<<< ("VMW_PSP_RR", "VMW_SATP_DEFAULT_AA")
      + CategoryInfo          : InvalidOperation: (setdefaultpsp:String) [], Run
     timeException
      + FullyQualifiedErrorId : InvokeMethodOnNull
  
  Version:
  PowerCLI Version
  ----------------
     VMware vSphere PowerCLI 5.0.1 build 581491
  ---------------
  The PSP for the Round Robin has changed?  According to my ESXi 5.0U1 host, I can't locate the PSP even longer.  Are we to use
  VMW_PSP_FIXED
  ~ # esxcli storage nmp satp list
  Name                 Default PSP    Description
  -------------------  -------------  -------------------------------------------------------
  VMW_SATP_ALUA        VMW_PSP_MRU    Supports non-specific arrays that use the ALUA protocol
  VMW_SATP_EVA         VMW_PSP_FIXED  Supports HP EVA
  VMW_SATP_MSA         VMW_PSP_MRU    Placeholder (plugin not loaded)
  VMW_SATP_DEFAULT_AP  VMW_PSP_MRU    Placeholder (plugin not loaded)
  VMW_SATP_SVC         VMW_PSP_FIXED  Placeholder (plugin not loaded)
  VMW_SATP_EQL         VMW_PSP_FIXED  Placeholder (plugin not loaded)
  VMW_SATP_INV         VMW_PSP_FIXED  Placeholder (plugin not loaded)
  VMW_SATP_ALUA_CX     VMW_PSP_FIXED  Placeholder (plugin not loaded)
  VMW_SATP_SYMM        VMW_PSP_FIXED  Placeholder (plugin not loaded)
  VMW_SATP_CX          VMW_PSP_MRU    Placeholder (plugin not loaded)
  VMW_SATP_LSI         VMW_PSP_MRU    Placeholder (plugin not loaded)
  VMW_SATP_DEFAULT_AA  VMW_PSP_FIXED  Supports non-specific active/active arrays
  VMW_SATP_LOCAL       VMW_PSP_FIXED  Supports direct attached devices
  ~ #
  			 
  Hi all
  I have several things to add here:
  * I have filed a bug for the initial post - error message is dark - the message in this case (referring non-existent namespace) should be "there are no namespace with the same name.
  On the the problem with the 'boot' setting - you run the command when you are connected to the vCenter Server? If so - try to run the same command directly against the ESX host. I look a little more on this subject...
  Vitali
  Team PowerCLI
  		   

• MSA2324i G2 Round-Robin

  Hello

  How can I correct policy path iscsi at all times for the round robin. After the reboot of the ESXi server path policy is new MRU.

  Thank you!

  Greetings

  Rouven

  esxcli nmp ATAS setdefaultpsp psp - VMW_PSP_RR - ATAS VMW_SATP_LSI.

  reset

  Binoche, VMware VCP, Cisco CCNA

• change the path of the fixed path selection strategy to round robin

  two questions

  1. is it safe to change the strategy of selection of the fixed path to round robin with the servers in the data store (round robin done work in our environment)

  2 can "lost access to the volume" messages be caused by too many servers using the same path of data warehouses. Many of the servers here use a couple of paths on a fixed track, instead of all four paths on round robin. I was wondering if the lost volume messages access were caused due to heavy traffic causing data 'pulse' written in the expiration time.

  1. is it safe to change the strategy of selection of the fixed path to round robin with the servers in the data store (round robin done work in our environment)

  You can, but first make sure that your table provider supports this configuration.

  2 can "lost access to the volume" messages be caused by too many servers using the same path of data warehouses. Many of the servers here use a couple of paths on a fixed track, instead of all four paths on round robin. I was wondering if the lost volume messages access were caused due to heavy traffic causing data 'pulse' written in the expiration time.

  Check if help: VMware KB: Host Connectivity degraded in ESX/ESXi

• Can definition of Round Robin way strategy - I just use the GUI?

  I have HP EVA6400 arrays and also HP XP20000.

  I use ESX 4.1 U1 and the recommendation of HP is using Multipathing Round Robin policy.

  I guess I could just use the vSphere client and select configuration > storage > datastore > properties > manage paths > Round Robin > change

  
  This approach would have certainly changed politics of this server for the selected LUN path, then repeat for each.

  But I read something on a blog lastnight that said having to perform the setting of the path of the CLI to set VMW_PSP_RR nmp esxcli.

  
  Can someone enlighten me please.

  
  Thank you

  You can use the command-line like esxcli well:

  List of devices esxcli nmp

  esxcli device setpolicy - device - psp VMW_PSP_RR nmp

• DEOs change to the political necessity of round robin to restart the ESX Server

  Hi friends,

  When set politics multi-path set to Round robin, is it necessary to restart the ESX Server?

  Thank you.

  No.... You should see that paths become active after you change the setting.

  André

• What broadcast and Round Robin at the same time of the modes of distribution?

  Hi all
  
  as you know it some methods so that they were distributing data between consumer and producer of games. for ex: partition, hash, range...
  
  If you use one order by statement at the same time a statement that you will probably see the range method because the sets of consumption creates a range of order the lines and every time an execution in parallel to producer (parallel) server wants to send a row, he look for parallel processes of consumer who has an appropriate range of selection.
  
  but on the methods of dissemination and Round robin, I couldn't understand what they do and how to work Hey... I searched the documentation, but I couldn't find a document that explains their good. for ex if I write a select statement like this
  

  select /*+ parallel(sales, 4) */ * from sh.sales
  union
  select * from sh.sales2

  then I can see alternating in the execution plan.
  
  So what's "Broadcast" and what do do "Round robin".
  
  Thanks a lot for the answers.
  
  Edited by: elcaro on Sep 25, 2011 11:00

  in the method of Robin, a set of parallel processes to manage your data and process series send all data (she) up to the parallel treats each as a game of poker. in your example, manages the sales data in the table by the (process) parallel execution servers and sales2 table is managed by a process series (one).

  disseminate the method, a line sends to all the processes of consumption.

• CF, multipath round robin ESXi 4.1 and HP MSA1000

  Hello

  I'm trying to set up a path of multi round robin on the FC san to access the 1 test data store.

  Our FC network is 4 GB. The ESXi server have 2 HBA must provide ~2*4Gb/s path of Round Robin selection.

  But there aren't any.

  By default, the configuration was MRU and one path marked as 'Active i/o' and another 'Active'.

  Change to round robin, reboot, changed the limit of operation I/O 1, nothing has worked. I see in the performance graph, that a path is never used.

  See the screenshots and the results of the following command.

  Any ideas?

  ~ # esxcli nmp roundrobin methods - device naa.60060b0000839530ab5e8a224fc10023

  The byte limit: 10485760

  Feature: naa.60060b0000839530ab5e8a224fc10023

  IO operation limit: 1

  Limit Type: Ops / s

  Use paths Active not optimized: false

  ~ # esxcli nmp ATAS methods - device naa.60060b0000839530ab5e8a224fc10023

  {implicit_support =; explicit_support =; explicit_allow =; alua_followover =; {TPG_id = 2, TPG_state = AO} {TPG_id = 1, TPG_state = year}}

  I can't run the commands for the other HBA device because it says that the device do not exist:

  ~ # ls/vmfs/devices/drives/naa *.

  /VMFS/devices/disks/NAA.60060b0000839530ab5e8a224fc10023 /vmfs/devices/disks/naa.60060b0000839530ab5e8a224fc10023:1

  ~ # esxcli nmp roundrobin methods - device naa.60060b0000839530ab5e8a224fc10023:1

  Errors:

  Could not find the device with the name naa.60060b0000839530ab5e8a224fc10023:1

  I'm missing something but what?

  Thanks for help

  Hello

  Right, in the creation of 10 X 100 GB LUN then extenting considers them together is certainly NOT a recommended option. Lets take your scenario of 2 virtual machines with 100 GB VMDK, Yes this would spread the work of two controllers, but why bother. Simply create two LUNS to 100 GB with controllers of different managers, and you have reached the same goal end, more removed the complexity and potential problems in the future.

  With extents, the metadata is stored on the first measure, and so when he changes (snapshot, VMDK growth, turn on/off VMs, etc.) then all of the LUNS that make up this data store get "locked". If you have something that does this too in the first measurement, then you will take on the complete data store.

  Other things to think about with extents: If you lose a LUN (one of the scopes), then you lose the entire data store. Damaged metadata will take on the entire data store (all the LUNS that compose). Let's say you must remove a scope, you must destroy the whole extent, etc.. Personally, it is more flexible and easier to manage individual data warehouses, that is if you have the unit number logic that is no longer used (IOs) then you can move the virtual machines assigned to another data store.

  No, I'm not saying that EVA is not able to use two controllers, just that it is not designed to have two controllers maintenance the same LUN (vDisk). Regarding the EVA, you configure the same, i.e. each LUN is assigned to another controller management and so you are balancing the full workload through both of them.

  If you want a unit number logic to use all possible paths (i.e. two controllers) then you need to use Round Robin and configure it to use the non optimized paths. If your unit number logic is mainly written so you can get some benefits from that cache is reflected across both controllers, i.e. any controller made writing as well get it. However, you take a penalty (overhead) for all readings in this configuration as a request for a read on the non management controller is transmitted to the management controller. Since the vm workloads are normally random (ours is 50: 50 read/write) the gains you make on the Scriptures will be lost on read and actually exceed the delivery, i.e. latency increased, controllers overloaded, etc..

  Kind regards.

• Round Robin PSP

  Buenas,

  queria formular una pregunta relacionada con the caminos Round Robin balanceo politica. Por el defecto e/s operation limit of esta politica in vsphere 5 are of 1000 comandos E/S.

  Hay several recommandations al respecto, sobretodo TR el trafico cabina dado por alguna VM than genere viene muchas helps in las una config del IO operation limits con bajos values (1 to 3 E / S in los detrimento 1000 comandos E/S por defecto), pueden ser mejores.

  Hay of autores that defienden esa causa having into account back handicaps, como el mayor consumo procesador nuestro ESXi host para manage el traspaso los comandos por los cada tan poco tiempo o paths well cabinas that can use hidden a nivel puerto y hacerlas volver a poco Louis (hidden lately aunque a nivel puerto aren't often find in las nuevas cabinas).

  In Relación a esto, ¿habeis hecho algun cambio in los para operation IO Round Robin, monitor objetivamente showing of flow limitation?

  Por otra parte, con Round Robin, in case of caida UN camino (is corta el cable, oh), if el camino vuelve life, Robin volvera a utilizarlo para enviar comandos o ¿Round is el aislara?

  Saludos thanks

  Hola compañero,

  answering intento a tus dudas.

  None are to change el PSP obligado a Round Robin. ES mas hacerlo sin a good reason can give problems.

  VMware is select los protocolos multipathing than van a funcionar in 99.99% of cases, para 'tocarlo' hay than estar seguro what y porque is hace.

  If to select el operation IO limit a 1 en PSP el, usually to experimenta UN Mayor flow acceso a esa LUN in concreto of the cabina.

  Desde mi experiencia, is can pasar a Round Robin con el limited IO operation has 1, siempre as manufacturer of the cabina datos el asi lo explains in its document of best practices.

  Por ultimo, if to cae UN camino, y to vuelve a recover pasado a tiempo, el alternating vuelve a usar el camino con normal. No todos los types for PSP is compartan asi (consulta P.D2 mi)

  Espero ayuda sido acercado

  Kind regards

  Pablo

  P.D1: Algo of information of este tema en UN vmware kb:

  VMware KB: Setting limit Round Robin IOPS / s by default of 1000 to 1

  PD2: Te perfect consultar el siguiente PSP, vale la Peña las sober vmware kb:

  VMware KB: Policies of Multipathing in ESXi ESXi/ESX 4.x and 5.x

• Why you should not use NMP/round robin MPIO with MSCS in ESXi < 5.5?

  There, could someone explain to me why MSCS do not work well with turnstile NMP on ESXi < v5.5?  Best explanation I've seen is that each path is "seen" differently by the guest operating system continuously, send commands to reset and SCSI reservation everything slow.  No doubt this could complicate situations requiring a turnaround as well...

  Looking for a good explanation - which would also help me to understand how it "works" in ESXi 5.5 + now.

  According to Cormac Hogan:

  In the past, political path of round robin might not supported on MSCS shared storage. It was because of the inability to release SCSI reservations on some routes when the reserve has been placed on a different path on the same disk. With the release of vSphere 5.5, this problem has now been addressed and we support RR on storage that is consumed by the MSCS nodes.

  source

• PowerCLI, Multipathing change: fixed RDM and VMFS of Round Robin

  With the new improvements in vSphere native mulit pathing (NMP) in 5.1, I tried to change my LUN to use repetition alternated according to EMC with my flare VNX practices code.

  However, I also have MSCS clusters that don't support a fixed mode according to the http://kb.vmware.com/kb/1037959.

  Later, I want to get all my VMFS volumes and set them to Round Robin and let all of my RDMs set to fixed.

  I'm hoping to dynamically so that I can leave it with the admin here to run whenever he wants, but I'm fighting to achieve.

  What I've tried so far.

  I can get all my LUNS with these commands.

  $esxcli= Get-EsxCli

  $Allmyluns = Get - esxcli.storage.nmp.device.list () | Where {$_ .device - like 'naa.*'}

  I can get all my RDM with this command

  $RDMS = get - vm | Get-hard drive | where {$_.} SCSIcanonicalname - like 'naa.* ' | Select SCSIcanonicalname

  I can put the method once I have the storage in this way

  $esxcli= Get-EsxCli

  Foreach ($lun in $allmyluns({

  $esxcli.nmp.device.setpolicy($null, $_.Name,"VMW_PSP_RR")

  }

  I have also thought about writing a csv or text file with the first command and trying to remove the entries with the second command but that is a bit past me, and I may be trying to over-complicate things unnecessarily.

  
  

  But what I can’t do is work out how to get a list whenever I want that has all the VMFS LUNS but not any of the RDM LUNS. So I can dynamically feed this into a script which updates VMFS pathing to Round Robin.

  
  

  Any help, input or ideas would be greatly appreciated

  This should help you all VMFS LUNS.

  Get-Datastore | where {$_.Type -eq "VMFS"} | %{  $_.ExtensionData.Info.Vmfs.Extent | %{    $_.DiskName  }}
  

• Change LUN to round Robin

  Hello, a few weeks ago, I found a command when issued via an SSH session, set multiple paths for all the LUNS of Round-Robin. It was a single line command that worked for all LUNS existing and new LUNS after a reboot.

  However, I can't find now command - does anyone know the syntax?

  Thank you

  See the discussion below:

  http://communities.VMware.com/thread/331346

• Round Robin

  Hello

  Can I know what is alternate., it's a way of storage? Can someone please develop on that? or any link that explains things around that?

  Thank you

  Prashant

  Round Robin is a strategy of creating paths to storage, it is fixed, more recently used and round robin.

  Basically, if you have active/active paths in your data store you can use RR this alternate paths so that the load is balanced on between two active paths, where fixed and MRU used only one path unless there is a power failure.

  Not all storage arrays are supported RR... Here's a quick link

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalID=1011340