[openstack-dev] [Nova][Vmware]Bad Performance when creating a new VM

Ray Sun xiaoquqi at gmail.com
Thu Jan 9 00:42:27 UTC 2014

Thanks for your response.

I make another testing to upload my iso to my ESXi host directly, the speed
is much faster now, avg is more than 40 MB/s. By the way, is my
vcenter server.

I will keep you update if I have some new found. Thanks a lot.

Best Regards
-- Ray

On Thu, Jan 9, 2014 at 1:09 AM, Rick Jones <rick.jones2 at hp.com> wrote:

> On 01/07/2014 06:30 PM, Ray Sun wrote:
>> Stackers,
>> I tried to create a new VM using the driver VMwareVCDriver, but I found
>> it's very slow when I try to create a new VM, for example, 7GB Windows
>> Image spent 3 hours.
>> Then I tried to use curl to upload a iso to vcenter directly.
>> curl -H "Expect:" -v --insecure --upload-file
>> windows2012_server_cn_x64.iso
>> "https://administrator:root123.@
>> iso/windows2012_server_cn_x64.iso?dcPath=dataCenter&dsName=datastore2"
>> The average speed is 0.8 MB/s.
>> Finally, I tried to use vSpere web client to upload it, it's only 250
>> KB/s.
>> I am not sure if there any special configurations for web interface for
>> vcenter. Please help.
> I'm not fully versed in the plumbing, but while you are pushing via curl
> to you might check the netstat statistics at the sending side,
> say once a minute, and see what the TCP retransmission rate happens to be.
>  If has to push the bits to somewhere else you should follow
> that trail back to the point of origin, checking statistics on each node as
> you go.
> You could, additionally, try running the likes of netperf (or iperf, but I
> have a natural inclination to suggest netperf...) between the same pairs of
> systems.  If netperf gets significantly better performance then you
> (probably) have an issue at the application layer rather than in the
> networking.
> Depending on how things go with those, it may be desirable to get a packet
> trace of the upload via the likes of tcpdump.  It will be very much
> desirable to start the packet trace before the upload so you can capture
> the TCP connection establishment packets (aka the TCP SYNchronize segments)
> as those contain some important pieces of information about the
> capabilities of the connection.
> rick jones
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