Hi ,

i have been browsing the discussion / kb and googled alot on this subject and didnt find any clear directions concerning this issue.  The issue being, the speed will not exceed between 3 and 4MB/sec (thats about 24 to 32mbit) network performence when we upload/download from the datastore using the VI client or the http browser. Even the VMWare convert 3 and 4 wont exceed that network speed.

BUT

Usual network traffic from/to the VM running in it, can achieve speed of 60MB/sec (500mbit) between each other and top the full gigabit (100-125MB/sec) if we do network transfer with another host/physical machine. So it is clearly not a disk IO or NIC issue, since my VM performs very well, and yes the VM are using the same vswitch as the host management.

Here are the test i did:

The Server is a proliant ML350 G5, 10GB ram, and the data store is a 900GB Raid 10 array composed of 4 x 450GB SAS 15K RPM disks

i have 2 VM guest (both windows 2003 x86) running on a VMware ESXi 3.5 U4 with HP management agents integreted

Both guest use enhanced vmxnet NIC.

Test #1: Transfer of a 600mb .iso file from a physical server to VM guest #1 took 7 seconds 650mb/7 = 92MB/sec (0.73gbit/s)

Test #2: Transfer from that same 600mb iso file from guest #1 to guest #2 took 12 seconds 650mb/12 = 54MB/sec (0.43gbit/s)

Test #3: Installed VI client on guest #2, logged into esxi, opened datastore to upload a file and upload that same .iso file took 210 seconds 650mb/210 = 3MB/sec (0.024gbit/sec or 24mbit/s.....)

Is this by design or normal or? I know that some peoples enable ssh on the host and then use scp that has way better performences, that can work out for file moving but what happens with converter then who has same performence as when we use datastore file upload/download? Anyone else having this same issue?

Thanks

Seb