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xen-api
RE: [Xen-API] XCP: dom0 scalability
Hi George,
> And one more...
>
> I think, this is point where we shall think again about XenSockets.
> They
> well be perfect for IDC.
I definitely agree that we need to create a nice IDC mechanism :)
I don't really know what the best mechanism would be... I've heard people talk
about a few different options.
One option is to create a protocol similar to blkback/blkfront and
netback/netfront i.e. using shared memory pages and event channels. This ought
to be the highest bandwidth approach. One potential downside is that a software
bug in one endpoint can prevent the other domain being cleaned up properly --
the domain will remain in the 'D'ying state until all memory is returned to it.
Another option is to create a protocol where instead of sharing memory pages,
memcpy() is used to move the data between domains. I think the XCI people might
be using a variant of this already.
There may be other options... what do you think?
Cheers,
Dave
>
> В Птн, 08/10/2010 в 20:54 +0100, Dave Scott пишет:
> > Hi,
> >
> > I've added a draft of a doc called "the dom0 capacity crunch" to the
> wiki:
> >
> >
> http://wiki.xensource.com/xenwiki/XCP_Overview?action=AttachFile&do=get
> &target=xcp_dom0_capacity_crunch.pdf
> >
> > The doc contains a proposal for dealing with ever-increasing dom0
> load, primarily by moving the load out of dom0 (stubdoms, helper
> domains etc) and, where still necessary, tweaking the number of dom0
> vcpus. I think this is becoming pretty important and we'll need to work
> on this asap.
> >
> > Comments are welcome.
> >
> > Cheers,
> > Dave
> >
> > _______________________________________________
> > xen-api mailing list
> > xen-api@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/mailman/listinfo/xen-api
>
>
>
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> xen-api@xxxxxxxxxxxxxxxxxxx
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