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Re: [Xen-users] Xen 4.2.5 Remus usage triggers random host restarts


I have yet to receive any suggestions regarding this problem.

Besides what has happened using patched (as mentioned before) Xen
4.2.5, I have tried using Remus+DRBD (8.3.11 version patched to
support protocol D) using out-of-the-box compilations of vanilla Xen
4.3.3 and 4.4.1 (optionally building xend). In both these versions
Remus, after successfully synchronizing the initial vm memory
snapshot, and when about to start making the incremental state updates
to the other host, simply fails.

Is anybody using this feature of Xen? Is this feature working in the
currently supported Xen minor versions?

Thank you,


On Thu, Nov 6, 2014 at 3:35 PM, JoÃo LuÃs Pinto <joaoluispinto@xxxxxxxxx> wrote:
> Hi,
> I am evaluating Xen Remus usage.
> The test systems consists of two virtualized hosts running Xen 4.2.5
> with Debian Wheezy 7.6, with the first compiled with the patches
> linked in the instructions available at http://remusha.wikidot.com/.
> Only the patches that can cleanly (or with minor adjustments) migrate
> to version 4.2.5 are applied, namely patches 02, 03, 05 and 06 and the
> drbd-hvm-fix.
> I am using the available patched version of drbd 8.3.11 (and
> overriding the kernel provided drbd module), and the sch-plug kernel
> module provided.
> For tests, I am running a pv domain (with a kernel supporting the
> event channel). After starting Remus, and after some time of having
> things running normally (two instances: one a few hours later and
> another 3.5 days later), the host running Remus unexpectedly reboots,
> leaving no trace of errors in the several logs
> (/var/log/{messages,dmesg,syslog},
> /var/log/xen/{xend.log,xend-debug.log}, the Remus log itself).
> Does anyone have any idea of what might be happening?
> Thank you,
> Joao

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