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slow NFS transfer speeds

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Hi everyone,

 

My scenario:

FreeNAS with:

-one CIFS directory

-one NFS directory

 

Esxi 5.1 with:

-2 hosts

-windows machines and linux machines

 

I have added the NFS directory as a new Datastore on both hosts and started to migrate 2 machines. The migration speed is soooo slow: 1MB/s or even much less, with spikes of 40MB/s (very rare spikes).

From a windows machine in my cluster, i tried to copy a file to/from the CIFS directory; the speed is ok - around 60MB/s

From a linux machine in my cluster, i tried to copy a file to/from the NFS directory; very slow transfer - max 1,5MB/s

Since all the machines share he same virtual NIC, it is clearly a problem with the NFS or something like that.

 

Any help on this problem is highly appreciated.

 

Thank you


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