Hi; Currently I am running xen 3.4.2 on one of my Centos servers , I want to upgrade to latest version of xen but I dont know if I should upgrade to latest branch of xen 3 or xen 4 ? is xen 4 backward compatible with xen 3 VMs ? does it provide any performance benefit compared to xen 3 ? What is your recommendation ? Regards
Hi; Currently I am running xen 3.4.2 on one of my Centos servers , I want to upgrade to latest version of xen but I dont know if I should upgrade to latest branch of xen 3 or xen 4 ? is xen 4 backward compatible with xen 3 VMs ? does it provide any performance benefit compared to xen 3 ? What is your recommendation ? Regards -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5491994.html Sent from the Xen - User mailing list archive at Nabble.com.
Hi, all Xen3 installed domU''s should run without any issues on Xen4. There are many improvements in Xen4. For more details read this http://wiki.xen.org/wiki/Xen_4.0_Release_Notes . -- Peter On 02/17/2012 10:44 AM, FiFtHeLeMeNt wrote:> Hi; > Currently I am running xen 3.4.2 on one of my Centos servers , I want > to upgrade to latest version of xen but I dont know if I should > upgrade to latest branch of xen 3 or xen 4 ? is xen 4 backward > compatible with xen 3 VMs ? does it provide any performance benefit > compared to xen 3 ? > What is your recommendation ? > Regards > > -- > View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5491994.html > Sent from the Xen - User mailing list archive at Nabble.com. > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >
Thank your for your reply On Fri, Feb 17, 2012 at 5:40 PM, Peter Viskup [via Xen] <ml-node+s1045712n5492116h32@n5.nabble.com> wrote:> Hi, > all Xen3 installed domU''s should run without any issues on Xen4. > There are many improvements in Xen4. For more details read this > http://wiki.xen.org/wiki/Xen_4.0_Release_Notes . > > -- > Peter > > On 02/17/2012 10:44 AM, FiFtHeLeMeNt wrote: > >> Hi; >> Currently I am running xen 3.4.2 on one of my Centos servers , I want >> to upgrade to latest version of xen but I dont know if I should >> upgrade to latest branch of xen 3 or xen 4 ? is xen 4 backward >> compatible with xen 3 VMs ? does it provide any performance benefit >> compared to xen 3 ? >> What is your recommendation ? >> Regards >> >> -- >> View this message in context: >> http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5491994.html >> Sent from the Xen - User mailing list archive at Nabble.com. >> >> _______________________________________________ >> Xen-users mailing list >> [hidden email] >> http://lists.xensource.com/xen-users >> > > > _______________________________________________ > Xen-users mailing list > [hidden email] > http://lists.xensource.com/xen-users > > > ________________________________ > If you reply to this email, your message will be added to the discussion > below: > http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5492116.html > To unsubscribe from Xen 3 vs Xen 4, click here. > NAML-- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5492387.html Sent from the Xen - User mailing list archive at Nabble.com. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
From my experience this is true if you keep using xm toolstack.> When I switched to Xen4.1.2 I had to modify some configuration files > (mostly because of management software that was used to put "proprietary > values in thoose files) that xl could not process. > Further more I also noticed really worst performances when starting a > domain with xl than with xm. > I just kept using xm and didn''t really dig into the problem, so am not > sure this is general or if you would face it too... But this is what > happened to me.Yes , my experience is the same. I did the upgrade and after upgrade the network settings was messed up and server lost its network connectivity. so I downgraded to branch 3 again. -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-vs-Xen-4-tp5491994p5498497.html Sent from the Xen - User mailing list archive at Nabble.com.
On 02/20/2012 09:54 AM, FiFtHeLeMeNt wrote:> > From my experience this is true if you keep using xm toolstack. >> When I switched to Xen4.1.2 I had to modify some configuration files >> (mostly because of management software that was used to put "proprietary >> values in thoose files) that xl could not process. >> Further more I also noticed really worst performances when starting a >> domain with xl than with xm. >> I just kept using xm and didn''t really dig into the problem, so am not >> sure this is general or if you would face it too... But this is what >> happened to me. > Yes , my experience is the same. I did the upgrade and after upgrade the > network settings was messed up and server lost its network connectivity. so > I downgraded to branch 3 again.I was upgrading from Xen3 to Xen4.0.1 and that upgrade was without any issues (running Debian stable). Anyway I have networking configured with system tools and not by Xend. It is much better to have it configured by system to overdue any such issues you are experiencing now. -- Peter
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 FiFtHeLeMeNt <farzad.fallah@gmail.com> schrieb:>Yes , my experience is the same. I did the upgrade and after upgrade >the >network settings was messed up and server lost its network >connectivity. so >I downgraded to branch 3 again.After several changes within the "auto networking" and naming conventions in xen 3 versions with xen 4 this part was widely "cleand up". It is fact that configuring the networking by the used Dom0 OS / distribution is more reliable but even more easy in the many different existing as thinkable setups - or make them just possible... Before you upgrade your productive machines from xen 3 to xen 4 you should plan your new networking and try it with xen 3 and disabled auto-bridge/auto-routing scripts. How your OS i.e. lets you configure new bridges should be well documented. If your prefer to do that by hand, use the brctl tool to create a new bridge and "connect" ethernet port(s) to it. Xen just has to know how your bridge is called (if you use just one as before i assume). In your DomU configs you should name the bridge too within vif. See i.e. in the howtos how todo that - there are manies out att. If anything goes correct under Xen 3 then you should be able to switch to 4 without further networking problems. good luck, Niels. - -- Niels Dettenbach Syndicat IT&Internet http://www.syndicat.com -----BEGIN PGP SIGNATURE----- Version: APG v1.0.8 iIEEAREIAEEFAk9CNgY6HE5pZWxzIERldHRlbmJhY2ggKFN5bmRpY2F0IElUJklu dGVybmV0KSA8bmRAc3luZGljYXQuY29tPgAKCRBU3ERlZRyiDXTVAJ4r0MCXhpC2 2bIpuAAbqxB1EzP3RACeLjOq9mMpPMNXnpAq0lrhxFa+OC8=uALJ -----END PGP SIGNATURE-----
Hello im using xen 4.1 on ubuntu oniric,and i want to have a vm for windows 7 in new using xen,the last days i was trying to enable vga passthrought but when i go to xen faq says that the configuration file for the vm is in /etc/xen but i use Virt manager to create and use vm''s, and i think is for this reason the config files can be diferent patch or file, in this case i know that virt manager use config.sxp but i dont know what i need to put in this type of configuration file the line vga pass* and pci * to enable it. Thanks in advance and sorry for my english.
Fajar A. Nugraha
2012-Feb-21 13:53 UTC
Re: How to enable gpu passthrough using Virt-manager
On Mon, Feb 20, 2012 at 7:33 PM, li0n <emaildeluismi@gmail.com> wrote:> Hello im using xen 4.1 on ubuntu oniric,and i want to have a vm for windows > 7 in new using xen,the last days i was trying to enable vga passthrought > but when i go to xen faq says that the configuration file for the vm is in > /etc/xen but i use Virt manager to create and use vm''s, and i think is for > this reason the config files can be diferent patch or file, in this case i > know that virt manager use config.sxp but i dont know what i need to put in > this type of configuration file the line vga pass* and pci * to enable it.The easiest way would be to convert it to native format first, You need to know how to use virsh and xm. See: - virsh dumpxml - http://libvirt.org/drvxen.html#xmlexport Then put the resulting file in /etc/xen, and manage it with xm -- Fajar