![]() Run exstop –u and hit f look at the DQLEN column.ĭQLEN is the queue depth of the storage device. Is the queue depth of the storage adapter. Need to run esxtop -d then f you will now press f you will now beĪble to see the stats for the adapter under the AQLEN column. d” will give you the current queue depth in the “QUED”įind the max queue depth for your storage adaptor, for that we will Resources! Google, forums, vmware / SAN support, and experiencedĬonsultants can guide you on your journey.Įnvironment is configured now so it exstop time. Will enable you to find the answers that you seek. Tools! Exstop, exscli, powercli, powershell, and your SAN interface Storage protocol? What storage vendors are you looking at if The next level of control over your storage environment.ĭown into things you will need to know before you start Įnvironment! What HBAs are you using? What SAN are you using? What I’m going to blow your mind, read on if you are ready to reach Way out hu? I can however, help you find the answer that works for Ports become underutilized and that nice expensive SAN you bought isĪnswer the first or second question, why? It depends. Settings are set too high the Storage ports get congested leading to ItĪllows vSphere host to have VMs that are able to share disk resourcesĪnd make having multiple VMDKs per LUN possible. (software or hardware) that sets a limit on the queue depth. It is a hardware dependent setting on the HBA or iSCSI initiator Limit of request that can be open on a storage port at any one time. Pending input/output (I/O) requests for a volume. I’m going to try and make it a little easier. Explaining the reasons whyĪre not common knowledge and start to delve into the deep darkĬorners of vSphere, sometimes turning people off to doing the That we can have huge datastores and storage choices are endless theĪnswer is a little more complicate. That leads us to the second question how many VMs can we put in these datastores? Now Have huge caches, auto-tiering, dedupe, and all around magic. ![]() The world is full of storage vendors that Need a fast disk in your vm? Carve up aĬhunk of the faster storage. Of the high performance raid 10 on 15k disks were carved up intoĢ50GB to 600GB LUNs and the raid 5 and 6 and 7.2k or 10k disks wereĪnywhere from 500GB to 2TB. Were segregated into disk speeds and raid arrays under 2TB. Back in theĭays of vSphere 4.1 you were limited to a volume size of 2TB so theĬhoice wasn’t as hard and most of the datastores I was running into What size do we need to make these datastores? Well the VMwareConfig Max doc for vSphere 6.5 list the maximum volume size ofĦ4TB, but just because you can doesn’t mean you should. It will provide the Datastore name, UsedSpace in GB, TotalSpace in GB and % of free space on the datastore.As a consultant I get all kinds of questions but two of the mostĬommonly asked is "What size do we need to make theseĭatastores?" and "How many VMs can we put in theseĭatastores?" Well I believe that both of these questions are Output of the above script will be similar to the below table. $datastores | Select – ,PercentFree | Export-Csv c:\datastorereport.csv -NoTypeInformation $ds | Add-Member -type NoteProperty -name PercentFree -value $PercentFree $PercentFree = Percentcal $ds.FreeSpaceMB $ds.CapacityMB If (($ds.Name -match “Shared”) -or ($ds.Name -match “”)) Both items are marked in yellow in the below script. ![]() Diff VCenter 5.5 appliance and vCenter on WIndowsĮnter your vCenter Server Name and Specify the output file name as per your wish.
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