How to set applications exceptional disc of Max new lower value?

We use an EMC VNX as our SAN, and we see high ABQL (average busy queue length) on the SAN. EMC support told me they see QFULL conditions, which means that the SAN can catch up with the number of applications. They recommend so reduce the depth of Queue LUN on my 5.5 ESX servers to reduce the load.

OK, I can understand that. We use Emulex HBA adapters, the default value is 32, so I'll put it up to 24 (at the beginning). But if you change the depth of the queue of the logic unit number, you must also replace Max drive exceptional requests, from what I've read. So I'll put that down is max 32 to 24.

Problem is, I have 26 warehouses of data that I need to change this setting, for 6 guests in a cluster. Change the depth of the queue of the logic unit number is pretty easy, I can do it manually (I put the host in maintenance mode and restart IT for this setting to take effect, anyway). But no way I want to publish manual 26

esxcli storage core device set -d naa.xxx -O Value


orders.

So, how can I recover all 'Ani' identifiers for all stores data for each host; Issue the command above, and then repeat for each host in the cluster (6)? I know how to get lists of servers in a cluster, and I think it will make me all the identifiers of data store:


Get-Datastore.

Where-Object {$_.ExtensionData.Info.GetType ().} Name - eq "VmfsDatastoreInfo"} |

{ForEach-Object

If ($_)

{

$Datastore = $_

$Datastore.ExtensionData.Info.Vmfs.Extent |

Select-Object - property DiskName

}

}

(I stole openly meanings of Robert van den Nieuwendijk, BTW)

But I'm not clear how to translate "esxcli" above, command line command in Powershell.

Anyone?

Try something like that.

Note that it requires PowerCLI 6.3R1 because it uses the switch on the cmdlet Get-EsxCli V2.

You can do it in a similar way the HBA queue depth

$clusterName = "mycluster.

foreach ($esx in (Get-Cluster-name $clusterName |)) Get - VMHost)) {}

$esxcli = get-EsxCli - VMHost $esx - V2

$esxcli.storage.vmfs.extent.list.invoke () | %{

$obj = $esxcli.storage.core.device.set.CreateArgs)

$obj.device = $_. DeviceName

$obj.schednumreqoutstanding = 32

$esxcli.storage.core.device.set.Invoke ($obj)

$obj = $esxcli.storage.core.device.list.CreateArgs)

$obj.device = $_. DeviceName

$esxcli.storage.core.device.list.Invoke ($obj) | Select the device, NoofoutstandingIOswithcompetingworlds

}

}

Tags: VMware

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