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)
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
DataMover all value set on 0.
Storage is supported VAAI Configuration.
Stil need to set the DataMover value to 1?
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.
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.
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.