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February 12th, 2015 04:00

EMC VNXe3300- While Cloning any ".vmdk" file at Vcentre level the Performance is very low

Hello Experts,

EMC VNXe3300- While Cloning any ".vmdk" file at Vcentre level the Performance is very low.

There is a ISCSI connection between VNX & C3000 enclosure for connectivity.

Please help me guys.

Thanks & Regards,@@

Sandy

341 Posts

February 12th, 2015 04:00

Any SCSI errors in the vmkernel.log?

Are the VAAI primitives enabled on the ESXi hosts?

1. Open the VMware vSphere Client.

2. In the Inventory pane, select the ESXi/ESX host.

3. Click the Configuration tab.

4. Under Software, click Advanced Settings.

5. Click DataMover.

Ensure the following parameters are set to 1 (Enabled)

HardwareAcceleratedMove

HardwareAcceleratedInit

HardwareAcceleratedLocking

Now check the storage device that the datastore resides on to see if the storage array supports the VAAI primitives:

esxcli storage core device vaai status get

We are looking for the following status:

Clone Status: Supported

February 12th, 2015 08:00

DataMover all value set on 0.

Storage is supported VAAI Configuration.

Stil need to set the DataMover value to 1?

2 Intern

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715 Posts

February 12th, 2015 13:00

I think you'll find that VNXe 3300 only supports VAAI primitives for NFS datastores, and that is configured by a vib/plugin that must be installed on each ESXi host.

February 12th, 2015 21:00

Yes Brett, You are right but we are using only VMWare & ISCSI LUN's on this EMC VNX.

All Other file like .ISO and all are copying very fast on datastores but only .VMDK file(machines) taking lot of time 200 GB - 9 to 10 hrs.

Any IDea, If any thing needs to check from Vcentre, ESX OR drivers side.

2 Intern

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715 Posts

February 13th, 2015 03:00

Are you just copying the vmdk's by browsing the datastores and copying/pasting to another ? I've never found this to produce great speeds (much like copying up/down using scp).

..or are you actually doing a cloning operation from vCenter ?

How is the performance when copying to your actual running vm's ?

As Conor suggested, also check the vmkernel.log for errors.

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