Hi list,
this is my first post. I have networking problems with ESX and linux guests.
I have a netboot farm with approx. 40 Guests booting and servicing over
the network.
I use 64Bit guestst with e1000. I also use the latest open-vm-tools from
2009.
Now i started to investigate perf. problems with esx and nfs clients.
The datastore is multiple connected through gigabit bonding. The client
intself is booting via pxe.
This is working very good without any troubles. But as we changed the
backend NAS with more nfs throughput the guests begin to loose the nfs
storage some times a day.
They lock up and then the load's going high and higher. later, if the
guest is able to connect again, the vm will process again.
Now i set up a template vm with 32 bit Paravirt and vmxnet.
The performance is increasing to 97 MB/s. In 64Bit mode with e1000 i
have on 50  MB troughput.
So that's fine.
But now i read that i should use the vmxnet3 driver which is not
working.I tried virtualdev=e1000,vmxnet and vlance.
But the vmxnet3 driver doesn't initialize the eth. interfaces.
Now, what is the vmxnet3 driver ?
Why does the driver not work with virtualdev=e1000 since the source show
the pci id ?
What is the best solution for maximizing the troughout  ?
The esx hosts a re quite idle but on load spikes some vm's loose the nfs
connection.

code Snip from vmxnet3:
vm_device_version.h:#define PCI_DEVICE_ID_INTEL_82545EM     0x100f

lspci: 00:11.0 Ethernet controller: VMware Inc Abstract Ethernet
Controller (rev 10)

Is the virtual=vmxnet option the best ?

Perhaps the developer of the vmxnet3 driver could give me an answer to
the question.


Kind regards

Franz


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