I have a windows server 2003 machine acting as our print server. It was a VM on ESX 4.1, and I have now transferred to my XCP 1.1 pool. I used this procedure to transfer the VM: 1. Uninstall VMW tools 2. Shutdown VM 3. Export as OVF 4. Convert and import OVF to XCP pool using XenConvert 5. Power up VM on XCP using XenCenter 6. Install Citrix XenTools using XenCenter 7. Configure IP to match what it was originally The server appears to work the same as before, at least as far as configuration. All of the users'' installed printers still function normally, and no additional changes had to be made to the server. The issue we have is that printing is now much slower. If I send a 35Mb PDF to the printer, I see it show up in the print queue on the server right away. However, I can watch it tick by VERY slowly as it sends that job to the printer. 0.1 MB every few seconds, whereas before this server was converted and moved to XCP, a job like that would fly right through. I''ve checked and there doesn''t seem to be any issue in the guest as far as CPU/Memory. They are hardly being touched. Any ideas? Thanks, Brett Westover
How is network performance in general? For example doing a UNC based copy to and from the guest from a box not in the pool? Also the "disabletaskoffloading" registry tweak mentioned here http://www.xenappblog.com/2010/citrix-xenserver-slow-network-performance/ Might be worth a shot ...... On Dec 2, 2011 5:52 PM, "Brett Westover" <bwestover@pletter.com> wrote:> > I have a windows server 2003 machine acting as our print server. It was > a VM on ESX 4.1, > and I have now transferred to my XCP 1.1 pool. > > I used this procedure to transfer the VM: > 1. Uninstall VMW tools > 2. Shutdown VM > 3. Export as OVF > 4. Convert and import OVF to XCP pool using XenConvert > 5. Power up VM on XCP using XenCenter > 6. Install Citrix XenTools using XenCenter > 7. Configure IP to match what it was originally > > The server appears to work the same as before, at least as far as > configuration. > All of the users'' installed printers still function normally, and no > additional changes > had to be made to the server. > > The issue we have is that printing is now much slower. If I send a 35Mb > PDF to the printer, > I see it show up in the print queue on the server right away. However, I > can watch it tick > by VERY slowly as it sends that job to the printer. 0.1 MB every few > seconds, whereas before > this server was converted and moved to XCP, a job like that would fly > right through. > > I''ve checked and there doesn''t seem to be any issue in the guest as far > as CPU/Memory. They > are hardly being touched. > > Any ideas? > > Thanks, > Brett Westover > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
>How is network performance in general? For example doing a UNC based copy to and >from the guest from a box not in the pool?I had the same thought. It seems fine. I haven''t done any scientific testing, but my ad-hoc file copies from/to a few different locations seem entirely normal.>Also the "disabletaskoffloading" registry tweak mentioned here >http://www.xenappblog.com/2010/citrix-xenserver-slow-network-performance/ >Might be worth a shot ......I''ll try that, but since I''m not really seeing bad network performance in general, I don''t know if it will help. What about that other fix mentioned on your link? "Disable CheckSum Offload". Is that applicable to XCP, using XenTools drivers? On Dec 2, 2011 5:52 PM, "Brett Westover" <bwestover@pletter.com> wrote:> > I have a windows server 2003 machine acting as our print server. It was > a VM on ESX 4.1, > and I have now transferred to my XCP 1.1 pool. > > I used this procedure to transfer the VM: > 1. Uninstall VMW tools > 2. Shutdown VM > 3. Export as OVF > 4. Convert and import OVF to XCP pool using XenConvert > 5. Power up VM on XCP using XenCenter > 6. Install Citrix XenTools using XenCenter > 7. Configure IP to match what it was originally > > The server appears to work the same as before, at least as far as > configuration. > All of the users'' installed printers still function normally, and no > additional changes > had to be made to the server. > > The issue we have is that printing is now much slower. If I send a 35Mb > PDF to the printer, > I see it show up in the print queue on the server right away. However, I > can watch it tick > by VERY slowly as it sends that job to the printer. 0.1 MB every few > seconds, whereas before > this server was converted and moved to XCP, a job like that would fly > right through. > > I''ve checked and there doesn''t seem to be any issue in the guest as far > as CPU/Memory. They > are hardly being touched. > > Any ideas? > > Thanks, > Brett Westover
> > Any ideas? >Run wireshark in your DomU and see if you are seeing a lot of resends or other strange things. That would indicate some sort of network issue James
>>How is network performance in general? For example doing a UNC basedcopy to and>>from the guest from a box not in the pool?>I had the same thought. It seems fine. I haven''t done any scientifictesting,>but my ad-hoc file copies from/to a few different locations seementirely normal.>>Also the "disabletaskoffloading" registry tweak mentioned here >>http://www.xenappblog.com/2010/citrix-xenserver-slow-network-performance/>>Might be worth a shot ......This seemed to fix it. My ad-hoc file copies don''t seem any different either way, but for some reason sending raw data to the printer was badly affected without this tweak.>What about that other fix mentioned on your link? "Disable CheckSumOffload". Is that>applicable to XCP, using XenTools drivers?Still curious about running that script to disable checksum on all of the interfaces. Should I do this, or wait and see if I have more network performance concerns?
My initial thought is "if it isnt broken, don''t fix it" but others might have a different opinion. On Dec 5, 2011 3:59 PM, "Brett Westover" <bwestover@pletter.com> wrote:> >>How is network performance in general? For example doing a UNC based > copy to and > >>from the guest from a box not in the pool? > > >I had the same thought. It seems fine. I haven''t done any scientific > testing, > >but my ad-hoc file copies from/to a few different locations seem > entirely normal. > > > >>Also the "disabletaskoffloading" registry tweak mentioned here > >>http://www.xenappblog.com/2010/citrix-xenserver-slow-network-performan > ce/ > >>Might be worth a shot ...... > > This seemed to fix it. My ad-hoc file copies don''t seem any different > either way, but for some reason sending raw data to the printer was > badly affected without this tweak. > > >What about that other fix mentioned on your link? "Disable CheckSum > Offload". Is that > >applicable to XCP, using XenTools drivers? > > Still curious about running that script to disable checksum on all of > the interfaces. Should I do this, or wait and see if I have more network > performance concerns? > > > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users