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xen-devel
[Xen-devel] Re: oxenstored in stubdom ?
On 21/08/10 23:39, Łukasz Oleś wrote:
Hi,
recently on irc channel (##xen) was some "discussion" about xen vs kvm...
There was idea that it would be nice if domUs could survive dom0 restart, but
this needs, for example, to have xenstored running in separate domain.
In 2009 Alex Zeffertt posted some patches
(http://lists.xensource.com/archives/html/xen-devel/2009-04/msg00696.html) to
add this functionallity, but they weren't applied.
So.. having xenstore in separate domain can have other advantages
(performance?).
Is it (or will be) possible run oxenstroed in stubdomain?
oxenstored is already restartable (or used to be and easy to fix if it
was broken), so from a xenstore point of view, you could already restart
dom0; Obviously this would block all the domains that try to do a
xenstore query, but if the dom0 is restarted quickly enough this
shouldn't be too noticeable since a normal working domain shouldn't use
much xenstore after starting up.
Regarding performance nobody profiled oxenstored in this context as far
as i know; I'm not sure that would be a win, and i would much rather
squeeze performance in the code directly than move xenstored in a
complicated setup.
--
Vincent
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