RE: [NTSysADM] Very strange problem file server - read vs. write
Sounds like you are referring to the issue where RSS Scaling is enabled, which by default is disabled on individual Windows NICs. I believe all the problem does is make the performance the same as if didn't have RSS Scaling enabled. In any case, VMware just came out with a new version of the Tools that resolves the issue. Even if your VM is not being affected, you may want to get the new version of the Tools, install them and set RSS Scaling on the NIC. It's supposed to make a big performance difference, though obviously any other issues you have may override that. Still probably worth trying. I've just begun to do that on servers where app owners say they need better network performance and so far I've only been able to do 2 or 3 due to the required reboot. -Original Message- From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On Behalf Of Jack Kramer Sent: Friday, May 26, 2017 11:53 PM To: ntsysadm@lists.myitforum.com Subject: Re: [NTSysADM] Very strange problem file server - read vs. write 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 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 wrote: >> Time for netmon/wireshark. >> >> -Original Message- >> From: listsad...@lists.myitforum.com >> [mailto:listsad...@lists.myitforum.com] 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 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" 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: listsad...@lists.myitforum.com >>>> [mailto:listsad...@lists.myitforum.com] 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 >>>> >>>> wrote: >>>>> Have you disabled smb1? >>>>> >>>>> -Original Message- >>>>> From: listsad...@lists.myitforum.com >>>>> [mailto:listsad...@lists.myitforum.com] 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 >>>>> >>>>> >>>> >>>> >>> >> >> > >
Re: [NTSysADM] Very strange problem file server - read vs. write
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 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 >> wrote: >> Time for netmon/wireshark. >> >> -Original Message- >> From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] >> 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 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" 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: listsad...@lists.myitforum.com >>>> [mailto:listsad...@lists.myitforum.com] 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 >>>> >>>> wrote: >>>>> Have you disabled smb1? >>>>> >>>>> -Original Message- >>>>> From: listsad...@lists.myitforum.com >>>>> [mailto:listsad...@lists.myitforum.com] 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 >>>>> >>>>> >>>> >>>> >>> >> >> > >
Re: [NTSysADM] Very strange problem file server - read vs. write
Please, that's a good one. Cesar A. On May 26, 2017 4:10 PM, "Kurt Buff" 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 > wrote: > > Time for netmon/wireshark. > > > > -Original Message- > > From: listsad...@lists.myitforum.com [mailto:listsadmin@lists. > myitforum.com] 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 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" > 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: listsad...@lists.myitforum.com > >>> [mailto:listsad...@lists.myitforum.com] 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 > >>> > >>> wrote: > >>> > Have you disabled smb1? > >>> > > >>> > -Original Message- > >>> > From: listsad...@lists.myitforum.com > >>> > [mailto:listsad...@lists.myitforum.com] 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 > >>> > > >>> > > >>> > >>> > >> > > > > > > >
Re: [NTSysADM] Very strange problem file server - read vs. write
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 wrote: > Time for netmon/wireshark. > > -Original Message- > From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] > 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 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" 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: listsad...@lists.myitforum.com >>> [mailto:listsad...@lists.myitforum.com] 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 >>> >>> wrote: >>> > Have you disabled smb1? >>> > >>> > -Original Message- >>> > From: listsad...@lists.myitforum.com >>> > [mailto:listsad...@lists.myitforum.com] 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 >>> > >>> > >>> >>> >> > >
RE: [NTSysADM] Very strange problem file server - read vs. write
Time for netmon/wireshark. -Original Message- From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 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 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" 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: listsad...@lists.myitforum.com >> [mailto:listsad...@lists.myitforum.com] 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 >> >> wrote: >> > Have you disabled smb1? >> > >> > -Original Message- >> > From: listsad...@lists.myitforum.com >> > [mailto:listsad...@lists.myitforum.com] 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 >> > >> > >> >> >
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 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" 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: listsad...@lists.myitforum.com >> [mailto:listsad...@lists.myitforum.com] 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 >> wrote: >> > Have you disabled smb1? >> > >> > -Original Message- >> > From: listsad...@lists.myitforum.com >> > [mailto:listsad...@lists.myitforum.com] 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 >> > >> > >> >> >
Re: [NTSysADM] Very strange problem file server - read vs. write
Indirectly, yes... I've tried this against our print server, on the same host, and the speeds are very acceptable, both wired and wireless. It's just the file server that is giving me this problem. One of the machines I've tried this from is a laptop that sits outside our firewall, on the same switch, - it's consuming one of our public IPs, getting internal access via DirectAccess. Same behavior - slow writes to file server, acceptable writes to print server. On Fri, May 26, 2017 at 2:07 PM, Michael B. Smith 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: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] > 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 > wrote: >> Have you disabled smb1? >> >> -Original Message- >> From: listsad...@lists.myitforum.com >> [mailto:listsad...@lists.myitforum.com] 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 >> >> > >
RE: [NTSysADM] Very strange problem file server - read vs. write
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" 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: listsad...@lists.myitforum.com [mailto:listsadmin@lists. > myitforum.com] 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 > wrote: > > Have you disabled smb1? > > > > -Original Message- > > From: listsad...@lists.myitforum.com > > [mailto:listsad...@lists.myitforum.com] 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 > > > > > > >
RE: [NTSysADM] Very strange problem file server - read vs. write
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: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 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 wrote: > Have you disabled smb1? > > -Original Message- > From: listsad...@lists.myitforum.com > [mailto:listsad...@lists.myitforum.com] 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 > >
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 wrote: > Have you disabled smb1? > > -Original Message- > From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] > 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 > >
RE: [NTSysADM] Very strange problem file server - read vs. write
Have you disabled smb1? -Original Message- From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 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
