Hi Everyone, Is the 4.x branch suitable yet for serious production hosting services? We currently run the latest 3.x version with a CentOS Dom0 which has been rock solid for us, but wondering if we would gain any advantages by upgrading to 4.x? Are there any security issues fixed in 4.x that are present in 3.x? When we were deploying some server last summer, we tested 4.0, but found it to be a bit buggy (random lock-ups occurring) I''m just trying to get an idea of which version is used out there Cheers _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wed, Jan 12, 2011 at 09:45:13PM +0000, Jonathan Tripathy wrote:> Hi Everyone, > > Is the 4.x branch suitable yet for serious production hosting services? > We currently run the latest 3.x version with a CentOS Dom0 which has > been rock solid for us, but wondering if we would gain any advantages by > upgrading to 4.x? Are there any security issues fixed in 4.x that are > present in 3.x? > > When we were deploying some server last summer, we tested 4.0, but found > it to be a bit buggy (random lock-ups occurring) > > I''m just trying to get an idea of which version is used out there >Xen 4.0.2-rc1 was just released a couple of days ago. I''d recommend you to try it, and run some proper tests with your workloads and see how it goes. If you have any issues, or find some bugs, let us know. Note that some people have had random lockups due to ACPI C-states being enabled in the BIOS. That option is known to cause a lot of problems and crashes on multiple platforms, not only in Xen. Also dom0 kernel version will heavily affect the stability of the whole system. You basicly have two choises there. 1) pvops xen/stable-2.6.32.x branch, and SLES11 SP1 Xenlinux 2.6.32 kernel. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 15/01/11 12:44, Pasi Kärkkäinen wrote:> On Wed, Jan 12, 2011 at 09:45:13PM +0000, Jonathan Tripathy wrote: >> Hi Everyone, >> >> Is the 4.x branch suitable yet for serious production hosting services? >> We currently run the latest 3.x version with a CentOS Dom0 which has >> been rock solid for us, but wondering if we would gain any advantages by >> upgrading to 4.x? Are there any security issues fixed in 4.x that are >> present in 3.x? >> >> When we were deploying some server last summer, we tested 4.0, but found >> it to be a bit buggy (random lock-ups occurring) >> >> I''m just trying to get an idea of which version is used out there >> > Xen 4.0.2-rc1 was just released a couple of days ago. > > I''d recommend you to try it, and run some proper tests > with your workloads and see how it goes. > > If you have any issues, or find some bugs, let us know. > > Note that some people have had random lockups due to ACPI C-states > being enabled in the BIOS. That option is known to cause a lot of > problems and crashes on multiple platforms, not only in Xen. > > Also dom0 kernel version will heavily affect the stability > of the whole system. You basicly have two choises there. > 1) pvops xen/stable-2.6.32.x branch, and SLES11 SP1 Xenlinux 2.6.32 kernel. > > -- Pasi >I''m guessing if I went with the 4.x branch, is using the CentOS provided kernel out of the question? At the minute, we use the latest 3.x branch (3.4.3) due to extra features, but we use the kernel from CentOS (Red Hat) due to it stability and patch management (yum). 3.4.3 and CentOS provided kernel works really really well. Thanks _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Sat, Jan 15, 2011 at 06:23:36PM +0000, Jonathan Tripathy wrote:> > On 15/01/11 12:44, Pasi Kärkkäinen wrote: >> On Wed, Jan 12, 2011 at 09:45:13PM +0000, Jonathan Tripathy wrote: >>> Hi Everyone, >>> >>> Is the 4.x branch suitable yet for serious production hosting services? >>> We currently run the latest 3.x version with a CentOS Dom0 which has >>> been rock solid for us, but wondering if we would gain any advantages by >>> upgrading to 4.x? Are there any security issues fixed in 4.x that are >>> present in 3.x? >>> >>> When we were deploying some server last summer, we tested 4.0, but found >>> it to be a bit buggy (random lock-ups occurring) >>> >>> I''m just trying to get an idea of which version is used out there >>> >> Xen 4.0.2-rc1 was just released a couple of days ago. >> >> I''d recommend you to try it, and run some proper tests >> with your workloads and see how it goes. >> >> If you have any issues, or find some bugs, let us know. >> >> Note that some people have had random lockups due to ACPI C-states >> being enabled in the BIOS. That option is known to cause a lot of >> problems and crashes on multiple platforms, not only in Xen. >> >> Also dom0 kernel version will heavily affect the stability >> of the whole system. You basicly have two choises there. >> 1) pvops xen/stable-2.6.32.x branch, and SLES11 SP1 Xenlinux 2.6.32 kernel. >> >> -- Pasi >> > I''m guessing if I went with the 4.x branch, is using the CentOS provided > kernel out of the question? At the minute, we use the latest 3.x branch > (3.4.3) due to extra features, but we use the kernel from CentOS (Red > Hat) due to it stability and patch management (yum). 3.4.3 and CentOS > provided kernel works really really well. >In general Xen 4.0 works with 2.6.18 based dom0 kernel aswell. Try it and see how it goes with the el5 kernel :) I know gitco.de guys had some problems with the el5 dom0 kernel, but those might be already resolved. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> In general Xen 4.0 works with 2.6.18 based dom0 kernel aswell. > Try it and see how it goes with the el5 kernel :) > > I know gitco.de guys had some problems with the el5 dom0 kernel, > but those might be already resolved. >I had problems with xendomains failing to save and restore domains on startup/shutdown using 4.0 and the Gitco 2.6.18. Other than that, it seemed alright. I reverted back to 3.4.3 because xendomains would fail to restore and fail to auto-start them, as they were left in a broken state after the attempted restore. Xen 3.4.3 + CentOS''s 2.6.18 was a rock solid combination, Good luck getting pv_ops 2.6.32.27 +4.0.1 reliably working on CentOS 5.5. So far, it has been quite problematic for me. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 16/01/11 10:35, Ian Murray wrote:>> In general Xen 4.0 works with 2.6.18 based dom0 kernel aswell. >> Try it and see how it goes with the el5 kernel :) >> >> I know gitco.de guys had some problems with the el5 dom0 kernel, >> but those might be already resolved. >> > > I had problems with xendomains failing to save and restore domains on > startup/shutdown using 4.0 and the Gitco 2.6.18. Other than that, it seemed > alright. I reverted back to 3.4.3 because xendomains would fail to restore and > fail to auto-start them, as they were left in a broken state after the > attempted > restore.> Xen 3.4.3 + CentOS''s 2.6.18 was a rock solid combination,I 100% agree with you here. I''m using Xen 3.4.3 and CenOS''s 2.6.18 and it has been really rock solid! I''ve had a couple of crashes when trying to remove an LVM LV, but I figured that by doing "lvchange -an /dev/vg0/lvname" first before "lvremove /dev/vg0/lvname" instead of doing just the latter seems to keep it stable. Not even sure if that''s a Xen issue..> Good luck getting pv_ops 2.6.32.27 +4.0.1 reliably working on CentOS 5.5. So > far, it has been quite problematic for me. >Hmm may not try it then. I shall wait a few months until there is a "clear winner" in the community for 4.x (Which I believe is CentOS for the 3.x builds). _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Just wanted to ring on this one... On Sun, Jan 16, 2011 at 11:10:13AM +0000, Jonathan Tripathy wrote:> >Xen 3.4.3 + CentOS''s 2.6.18 was a rock solid combination, > I 100% agree with you here. I''m using Xen 3.4.3 and CenOS''s 2.6.18 > and it has been really rock solid!Yeah gitco.de''s 3.4.x and centos5 with 2.6.18 has been working pretty well for me. What you might also want to consider is running debian squeeze. Though, admidtedly, there have been 2 bugs which plagued my installs for about 1-2 days each when they poped up. Otherwise it''s also very good and you''ll have the latest xen-tools version *cough shameless plug* in your package manager. Regards, D. -- Dmitry Nedospasov <dmitry@nedos.net> -- Twitter: @nedos Web: http://nedos.net -- Github: http://github.com/nedos _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users