Round Robin... Tired of waiting. Anyone heard of chess out there in the production/test?

Similar Questions

• move on to the Round Robin

  Hello people,

  I'm a bit confused. I have my now see that they are defined as VMW_SATP_ALUA_CX and storage (EMC CX) defined on the failover mode 4, host rebooted. I think that now, I can go in each data store and change the path of 'Round Robin (VMware)' selection. I do a lot of MSCS and noticed that the Round Robin is not supported with SAM. I found the underside of VMware. He says Round Robin PSP is not supported for the LUNS mapped by RDM, but then there is a "note" that says with NMP, clustering is not supported when the value of the Round Robin. It's my confusion is not the note by repeating exactly what he says just on top of it, or I'm not getting something? Also, I'm running 5.0, are there other changes that I have to do to make this work?

  Strategy selection of the path (PSP)

  Round Robin PSP is not supported for the LUNS mapped by RDM used with shared cluster storage. If you decide to use PSP Round Robin with your storage array, or if the version of vSphere to uses the default values for PSP Round Robin for the table in use, you can change the PSP claiming the RDM LUN above other PSP. For more information, see editing a unit number logic to use another path selection policy (PSP) (1036189).

  Note: with native multipathing (NMP), clustering not is not supported when the strategy of path is set to Round Robin. For more information, see vSphere MSCS Setup Limitations in the configuration for Failover Clustering and Microsoft Cluster Service Guide for ESXi/ESX 4.x or 5.x ESXi.

  Any help would be great. This confuses me

  -MN

  For data warehouses, use RR and ALUA (4 failover mode) mode.

  For members of the MSCS (RDM) cluster, you will need to use fixed.

• 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 on HP P2000 G3 FC

  Hello.

  Anyone who has tried to round robin selection strategy the path for HP P2000 G3 FC?

  Thank you

  I didn't have a chance to try it myself, however, Round Robin is recommended political path HP (with the exception of MSCS configuration)

  See http://h20195.www2.hp.com/v2/GetPDF.aspx/4AA3-3801ENW.pdf

  Best practices for active tabulation P2000 G3 MSA
  As a best practice, round robin I/O path policy is the recommended setting for the P2000 G3 MSA table. MRU is the default setting and also suitable if round robin is not the position you want in the specific environment.

  André

• MSA 2000 fc vSphere and round robin

  I have a number of CF 2212 G1 MSA and MSA fc storage arrays 2312 G2 connected to 4 guests, I plan to upgrade to vsphere 4.0 ESXi 3.5. They have all two controllers and are run as active/active using fixed path. Licenses have been improved under the support agreement and will be the company licenses (as opposed to companies more)

  Can I use round robin on vsphere 4 with this configuration to provide the best balance between the 2 fabrics of SAN? Does anyone else has used alternate with this type of storage? I am a little concerned do this with the MSA212fc G1 because they do not have true active/active.

  Hello

  The VMware Compatibility Guide indicates the path policy should be set except HP make you otherwise it would not be supported.

  Kind regards

  Mike

  http://blog.laspina.ca/

  http://blog.laspina.ca/

  vExpert 2009

• Why not want to use Round Robin now (vSphere)?

  Given a configuration of storage fibre channel with more than one of THEM in each server (and more than one switch in the fabric) and what VMWare calls a table "active/passive" (where a single SP both "owns" a logic unit number), I saw messages in the last (see links at the bottom of this message) explaining how over time MRU can cause all of your traffic to fibre channel end on

  a single switch/HBA.

  So I wonder now because it is supported in vSphere, why I would want to use round robin for a table where vSphere uses by default a path MRU policy?  What's the downside for RR?  Is it safe (according to the docs RR is smart enough to only use 'active' paths in an active-passive array, but that is the case)?  Everybody use it now?  Alternatives that involve manually the balancing/re-balancing active links?

  These are positions that made me question initially MRU:

  • http://virtualgeek.typepad.com/virtual_geek/2009/04/understanding-MRU-behavior-in-VMware-ESX-3x.html

  • http://virtualgeek.typepad.com/virtual_geek/2009/02/are-you-stuck-with-a-single-really-busy-array-port-when-using-ESX-script-for-balancing-Multipathing-in-ESX-3x.html

  Thanks in advance.

  Hello

  If you have only 2 HBA ports on your host and they are active/passive then alternating really does not benefit anyone. If you have more than 2 ports and more than 1 port zoned on the active storage processor or your San is active/active then alternating would work fine.

  Best regards, Edward L. Haletky VMware communities user moderator, VMware vExpert 2009
  "Now available on Rough Cuts: url = http://www.astroarch.com/wiki/index.php/VMware_Virtual_Infrastructure_Security' VMware vSphere (TM) and Virtual Infrastructure Security: ESX security and virtual environment ' [url]
  Also available url = http://www.astroarch.com/wiki/index.php/VMWare_ESX_Server_in_the_Enterprise"VMWare ESX Server in the enterprise" [url]
  [url =http://www.astroarch.com/wiki/index.php/Blog_Roll] SearchVMware Pro [url] | URL = http://www.astroarch.com/blog Blue Gears [url] | URL = http://www.astroarch.com/wiki/index.php/Top_Virtualization_Security_Links Top security virtualization [url] links | URL = http://www.astroarch.com/wiki/index.php/Virtualization_Security_Round_Table_Podcast Virtualization Security Table round Podcast [url]

• Has anyone heard of a software package, which is supposed to be a Microsoft partner, called ARO?

  Has anyone heard of a software package, which is supposed to be a Microsoft partner, called ARO?

  Original title: System performance

  From what I can tell, this product is similar to another Fixer PC or acceleration of programs that are not necessary and may create problems.

  The registry of Windows 7 is also, not need of cleaning.

  I can't find a link with Microsoft and I doubt there is one.

  Just my opinion.

• 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

• 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

• 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

• 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  }}
  

• 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

• 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
  		   

• 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