\nIn our\u00c2\u00a0environment Fixed or PowerPath wasn’t an option as we have multiple hosts and datastores,
\nEMC has once now informed us that RR is only an option (not the best) if PowerPath or Fixed is not an option.<\/p>\n
Changing the policy for a few LUN’s won’t take long, if you only have a few hosts and a few datastores, but if you have multiple hosts with multiple datastores, the task is massive.<\/p>\n
Using Powershell and EsxCli the task is very easy and\u00c2\u00a0extremely\u00c2\u00a0fast. The below script illustrates how to set RoundRobin and not Fixed, this will be updated ASAP. Script explained<\/strong><\/p>\n Line 20-24: Line 27-30: Line 33-34: Line 37-40: Line 92-93: Line 95-96: Line 101-107: Line 111: If you want to see an output on the screen of the progress of the script, uncomment the lines 85, 91<\/p>\n Download the full RoundRobin script here<\/a>.<\/p>\n An exampel of what a report can look like: Post is updated after input from Josh Coen, www.valcolabs.com<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" When connecting some storage systems to vSphere, vSphere sometime doesn’t select the most optimal multipathing policy. I came\u00c2\u00a0across\u00c2\u00a0the above problem when adding an EMC VPLEX storage system to a \u00c2\u00a0large vSphere 4.1 installation. vSphere selected the Fixed path multipathing policy. In smaller\u00c2\u00a0environments\u00c2\u00a0this isn’t normally a problem , but when a Fixed policy is selected in\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,21,4,13,16],"tags":[309,313,318,316,311,317,314,312,315,310],"class_list":["post-640","post","type-post","status-publish","format-standard","hentry","category-esx-i","category-powershell","category-scripting","category-tools","category-esx-x","tag-emc","tag-esxcli","tag-fixed-policy","tag-iops","tag-multipathing","tag-powerpath","tag-psp","tag-roundrobin","tag-satp","tag-vplex"],"_links":{"self":[{"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/posts\/640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=640"}],"version-history":[{"count":34,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/posts\/640\/revisions"}],"predecessor-version":[{"id":665,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=\/wp\/v2\/posts\/640\/revisions\/665"}],"wp:attachment":[{"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.amikkelsen.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nThanks to Arnim van Lieshout\u00c2\u00a0(http:\/\/www.van-lieshout.com\/2011\/01\/esxcli-powercli\/<\/a>) for the basic script.<\/p>\n
\nUntil then take a look at this post from LucD http:\/\/communities.vmware.com\/message\/1774139<\/a>\u00c2\u00a0<\/span><\/strong><\/p>\n\r\n<pre>function FuncMail {\r\n param($To, $From, $Subject, $Body, $smtpServer)\r\n $msg = new-object Net.Mail.MailMessage\r\n $smtp = new-object Net.Mail.SmtpClient($smtpServer)\r\n $msg.From = $From\r\n $msg.To.Add($To)\r\n $msg.Subject = $Subject\r\n $msg.IsBodyHtml = 1\r\n $msg.Body = $Body\r\n $smtp.Send($msg)\r\n}\r\n\r\n#load Vmware Module\r\nif ((Get-PSSnapin | Where-Object { $_.Name -eq "VMware.VimAutomation.Core" }) -eq $null) { Add-PSSnapin VMware.VimAutomation.Core }\r\n\r\n# ----------- Variables ---------------\r\n#vCenter\r\n$vcServer = "vcenterserver"\r\n$vCenterUser = "vcenterusername"\r\n$vCenterPWD = "vcenterpassword"\r\n$DC = "*" # Use * for all DC else replace * with datacenter name\r\n$cluster = "*" # Use * for all Clusters in DC else replace * with cluster name\r\n\r\n# LUN settings\r\n$LUNType = "EMC Fibre Channel Disk*"\r\n$psp = "VMW_PSP_RR"\r\n$satp = "VMW_SATP_INV"\r\n$iops = 10\r\n\r\n# ESX\r\n$esxUser = "esxuser-root"\r\n$esxPWD = "esxuserpassword"\r\n\r\n# Email\r\n$strEmailTo = "to@mail.com"\r\n$strEmailFrom = "from@mail.com"\r\n$strEmailSubject = "PSP info '$vcServer' "\r\n$strEmailSMTP = "smtpserver.com"\r\n\r\n# HTML\r\n$strHeadHTML = "<STYLE TYPE='text\/css'>"\r\n$strHeadHTML += "TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}"\r\n$strHeadHTML += "TH{border-width: 1px;padding: 10px;border-style: solid;border-color: black; background-color:thistle}"\r\n$strHeadHTML += "TD{border-width: 0px;padding: 0px;padding-right: 5px;padding-left: 5px;border-style: solid;border-color: black}"\r\n$strHeadHTML += "<\/STYLE>"\r\n\r\n$strBodyHTMLStart = "<H3> Setting PSP multipath & IOPS : "\r\n$strBodyHTMLStart += Get-Date -Format g\r\n$strBodyHTMLStart += "<\/H3>"\r\n$strBodyHTMLStart += "<TABLE><TR> <TH>vCenter<\/TH> <TH>Datacenter<\/TH> <TH>Cluster<\/TH> <TH>Host<\/TH> <TH>Device<\/TH> <TH>SATP<\/TH> <TH>Old PSP<\/TH> <TH>New PSP<\/TH> <TH>IOPS<\/TH> <TH>Old Paths<\/TH> <TH>New Paths<\/TH><\/TR>"\r\n\r\n$strBodyHTMLinfoStart = "<H3> PSP multipath & IOPS not set : "\r\n$strBodyHTMLinfoStart += Get-Date -Format g\r\n$strBodyHTMLinfoStart += "<\/H3>"\r\n$strBodyHTMLinfoStart += "<TABLE><TR> <TH>vCenter<\/TH> <TH>Datacenter<\/TH> <TH>Cluster<\/TH> <TH>Host<\/TH> <TH>Device<\/TH> <TH>SATP<\/TH> <TH>PSP<\/TH> <TH>Paths<\/TH><\/TR>"\r\n\r\n# ---------- Logic (Don't Change) --------------------\r\n\r\n$strBODYHTML = ""\r\n$strBodyExcludeHTML = ""\r\n\r\n#Connect to vCenter\r\nConnect-VIServer $vcServer -User $vCenterUser -Password $vCenterPWD| Out-Null\r\n\r\n#Get Datacenter Clusters\r\n$arrDC = Get-Datacenter -Name $DC | Sort Name\r\nif($arrDC){\r\n foreach($objDC in $arrDC){\r\n\r\n #Get Cluster list\r\n $arrCluster = Get-Cluster -Location $objDC -Name $cluster | Sort name\r\n if($arrCluster){\r\n foreach($objCluster in $arrCluster){\r\n\r\n #Connect to ESX hosts in cluster\r\n foreach ($esx in Get-VMHost -Location $objCluster | Sort Name) {\r\n\r\n Connect-VIServer $esx -User $esxUser -Password $esxPWD | Out-Null\r\n\r\n#Retrieve the esxcli instances and loop through them\r\n foreach($esxcli in Get-EsxCli -Server $esx.name) {\r\n\r\n #Write-Host $esx.Name -BackgroundColor Red\r\n\r\n # Change PSP for EMC VPLEX\/VMAX devices\r\n $arrDevice = $esxCli.nmp.device.list() | where {$_.PathSelectionPolicy -ne $psp -and $_.DeviceDisplayName -like $LUNType}\r\n if($arrDevice){\r\n foreach($myDevice in $arrDevice){\r\n #Write-Host "Updating $($myDevice.Device)" -ForegroundColor green\r\n $esxCli.nmp.device.setpolicy($null, $myDevice.Device, $psp)\r\n $esxcli.nmp.roundrobin.setconfig(0,$myDevice.device,[long]$iops,"iops",$false)\r\n\r\n $newPSP = $esxCli.nmp.device.list($myDevice.device)\r\n $newIOPS = $esxcli.nmp.roundrobin.getconfig($myDevice.device)\r\n $strBODYHTML += "<TR> <TD>$($vcServer)<\/TD> <TD>$($objDC.Name)<\/TD> <TD>$($objCluster.Name)<\/TD> <TD>$($esx.Name)<\/TD> <TD>$($myDevice.Device)<\/TD> <TD>$($myDevice.StorageArrayType)<\/TD> <TD>$($myDevice.PathSelectionPolicy)<\/TD> <TD>$($($newPSP[0]).PathSelectionPolicy)<\/TD> <TD>$($newIOPS.IOOperationLimit)<\/TD> <TD>$($myDevice.WorkingPaths)<\/TD> <TD>$($($newPSP[0]).WorkingPaths)<\/TD><\/TR>"\r\n }\r\n }\r\n\r\n # Changes not set on\r\n $arrInfoDevice = $esxCli.nmp.device.list() | where {$_.PathSelectionPolicy -ne $psp -and $_.DeviceDisplayName -like $LUNType}\r\n if($arrInfoDevice){\r\n foreach($myInfoDevice in $arrInfoDevice){\r\n $strBODYHTMLinfo += "<TR> <TD>$($vcServer)<\/TD> <TD>$($objDC.Name)<\/TD> <TD>$($objCluster.Name)<\/TD> <TD>$($esx.Name)<\/TD> <TD>$($myInfoDevice.Device)<\/TD> <TD>$($myInfoDevice.StorageArrayType)<\/TD> <TD>$($myInfoDevice.PathSelectionPolicy)<\/TD> <TD>$($myInfoDevice.WorkingPaths)<\/TD><\/TR>"\r\n }\r\n }\r\n\r\n #Change the default PSP for my SATP\r\n $esxcli.nmp.satp.setdefaultpsp($psp,$satp) | Out-Null\r\n }\r\n Disconnect-VIServer $esx.name -Confirm:$false\r\n }\r\n }\r\n }\r\n }\r\n}\r\n#Disconnect from vCenter\r\nDisconnect-VIServer $vcServer -Confirm:$false | Out-Null\r\n\r\n$strBodyHTMLEnd = "<\/TABLE>"\r\n$strBodyHTMLinfoEnd = "<\/TABLE>"\r\n\r\n# Collect the HTML\r\n$strHTML = "<HTML><HEAD>"\r\n$strHTML += $strHeadHTML\r\n$strHTML += "<\/HEAD><BODY>"\r\n$strHTML += $strBodyHTMLStart\r\n$strHTML += $strBODYHTML\r\n$strHTML += $strBodyHTMLEnd\r\n$strHTML += $strBodyHTMLinfoStart\r\n$strHTML += $strBODYHTMLinfo\r\n$strHTML += $strBodyHTMLinfoEnd\r\n$strHTML += "<\/BODY><\/HTML>"\r\n\r\n# Email the collected data\r\nFuncMail -To $strEmailTo -From $strEmailFrom -Subject $strEmailSubject -Body $strHTML -smtpServer $strEmailSMTP\r\n<\/pre>\n
\nAdd you vCenter server name and the logon credentionls.<\/p>\n
\nLUNTYPE, is the storage type you want to change PSP and SATP for (you can set this to *, if you want you set the PSP and SATP for all datastores.
\nPSP, is the multipathing policy you want to change to.
\nSATP, is the storage array type you want to change the default to.
\nIOPS, is the number of IO’s to be send, before switching to the next path. vSphere default is 1000, EMC recommends 1, but I found 10 to work for me.
\nStephen Foskett has\u00c2\u00a0explained what is PSP and SATP in plain English\u00c2\u00a0\u00c2\u00a0http:\/\/blog.fosketts.net\/2011\/06\/06\/vmware-esx-vsphere-satp-psp-support-matrix\/<\/a>.<\/p>\n
\nChange the user to a user with root\u00c2\u00a0privileges.
\nChange the password to\u00c2\u00a0correspond with the user.<\/p>\n
\nChange the info to\u00c2\u00a0receive\u00c2\u00a0an report of what has been changed.<\/p>\n
\nSets the PSP and IOPS for each datastore.<\/p>\n
\nRetrieves the new settings (for\u00c2\u00a0verification) for \u00c2\u00a0each datastore.<\/p>\n
\nGenerates a list of datastores, where the PSP setting wasn’t able to be set.
\nRun the script again to set them.<\/p>\n
\nSets the hosts default datastore PSP and SATP.
\nIf your hosts connect to\u00c2\u00a0multiple\u00c2\u00a0different storage systems, I wouldn’t recommend setting this, but it’s to you.<\/p>\n
\n![\"\"](\"http:\/\/www.amikkelsen.com\/images\/vplex_multipath_report.jpg\" "\\"PSP,")
<\/a><\/p>\n