transfer rate between esxi hosts very slow
Posted on 2013-06-14
I have a strange problem with speed between two ESXi 5.1 hosts managed by a vCenter.
The machines involved are two Dell PowerEdge 2950 (local datastore, one has 15k disks, the other 7k2) , connected together by redundant gigabit network.
Each of them has a local datastore on which runs some VMs.
If I do a file transfer between this hosts by Datastore Browser or by a backup software (VMX emplorer), the speed that I reach is about 6/10 MB/sec.
You might think of a problem resident on the network, but performing a file transfer between VMs runnings on different host , I reach good performance (60/100 MB/sec). I also try to disable redundant nic for sake, but problem stiil remains.
We may think of datastore I/O problem of one of the two hosts, but it is not so because benchmarking each datastore, each result is good.
thank's a lot