Update - still not solved:
Got on a call with a MSFT rep. He ran a quick shell script that did
the things I've already done:
netsh interface tcp set global chimney=disabled
netsh interface tcp set global rss=disabled
netsh int tcp set global autotuning=disabled
netsh int tcp set global congestion=none
netsh int tcp set global netdma=Disabled
I've put him off for now, as I'm seeing what might be a related
problem crop up - the ancient CRM we're using has been spouting errors
all day about not being able to write to the database.
I've looked at CPU ready on both machines, and the file server's is
pretty bad, but the other server's isn't. That's after migrating them
to a single host together, and migrating everything else off that host
- just those two VMs on this host. I've also looked at performance
charts in vmware for both machines regarding disk and network, and am
not seeing anything out of line.
I'm trying to install the vmware support assistant appliance, but am
running into problems with SSO auth - the vsphere infrastructure was
upgraded from 5.5 to 6.0, and it looks like I have a project ahead of
me to fix the SSL certs, which this post seems to cover:
https://virtuallyunderstood.wordpress.com/2016/08/03/troubleshooting-expired-psc-certificates-with-vsphere-6/
Further, I've checked with Nimble support, and they say that there is
some latency, but that their tools indicate that it is external to the
array - they're pointing at vsphere or the network, and suggesting I
should fail over the array to its other interface to see if that
clears the problem. I'm saving that for later.
I'm also going to see about setting up a machine to monitor the
server/iSCSI switch to which the hosts and SANs are attached - what
I'm seeing in PRTG for that doesn't give me what I want.
It just goes deeper and deeper...
Kurt
Kurt
I've got a ticket open with vmware now
On Fri, May 26, 2017 at 12:20 PM, Kurt Buff <[email protected]> wrote:
> All,
>
> I have a 2012R2 file server running as a VM on vSphere 6.0.
>
> Here's what I'm seeing:
>
> Copy large file (win7 ISO) from file server to workstation, I get
> roughly 12-13Mbytes/second, wired or wireless.
>
> Copy that file from workstation to server over a wireless connection,
> same speed - 12-13Mbytes/second
>
> Copy that file from workstation to server over wired connection, speed
> degrades to 1Mbyte/second or less
>
> Copy that file to another 2012R2 VM on the same host on the same SAN
> volume (our print server), and speeds are 12-13Mbytes/second for both
> wired and wireless.
>
> I've made sure that the following are disabled: RSS, atime, 8.3
> filename generation, TCP Chimney.
>
> RAM and CPU utilization on this machine are well within limits.
>
> I'm thoroughly stumped.
>
> Anyone have pointers for me? I'm about to raise a case with MSFT.
>
> Kurt
