VMXNET3 adapter? There's a bug I'm halfway remembering with the paravirtualized driver, 10.x tools branch, and multi-core guest VMs. Perhaps you're running into that?
Sent from my iPhone > On May 26, 2017, at 7:10 PM, Kurt Buff <[email protected]> wrote: > > I'm on the phone with MSFT now. > > I'll update y'all once I know more. > > Kurt > >> On Fri, May 26, 2017 at 3:54 PM, Michael B. Smith <[email protected]> >> wrote: >> Time for netmon/wireshark. >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] >> On Behalf Of Kurt Buff >> Sent: Friday, May 26, 2017 6:09 PM >> To: ntsysadm >> Subject: Re: [NTSysADM] Very strange problem file server - read vs. write >> >> Multiple workstations. I've migrated the file server to different hosts (5 >> in the cluster), and it doesn't seem to make a difference. >> >> Kurt >> >>> On Fri, May 26, 2017 at 2:17 PM, elsalvoz <[email protected]> wrote: >>> One, multiple or all workstations? How about server on different host >>> or physicals? >>> >>> Cesar A. >>> >>>> On May 26, 2017 2:10 PM, "Michael B. Smith" <[email protected]> wrote: >>>> >>>> Without a trace I can't be sure. But it seems likely. >>>> >>>> Have you also verified that the link is negotiating to the highest >>>> speed available and that it is error free? >>>> >>>> -----Original Message----- >>>> From: [email protected] >>>> [mailto:[email protected]] On Behalf Of Kurt Buff >>>> Sent: Friday, May 26, 2017 4:04 PM >>>> To: ntsysadm >>>> Subject: Re: [NTSysADM] Very strange problem file server - read vs. >>>> write >>>> >>>> No, we have not. It's required for some older machines. >>>> >>>> FWIW, the client's I'm testing with are Win10 1607. >>>> >>>> I presume that your implication is that turning it off would speed >>>> things up? >>>> >>>> Kurt >>>> >>>> On Fri, May 26, 2017 at 12:33 PM, Michael B. Smith >>>> <[email protected]> >>>> wrote: >>>>> Have you disabled smb1? >>>>> >>>>> -----Original Message----- >>>>> From: [email protected] >>>>> [mailto:[email protected]] On Behalf Of Kurt Buff >>>>> Sent: Friday, May 26, 2017 3:20 PM >>>>> To: ntsysadm >>>>> Subject: [NTSysADM] Very strange problem file server - read vs. >>>>> write >>>>> >>>>> 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 >>>>> >>>>> >>>> >>>> >>> >> >> > >
