[Xen-devel] Re: ocaml?? why??

[Vincent Hanquez <vincent.hanquez@xxxxxxxxxxxxx>]

John Levon wrote:
> Whilst I agree that xenstored's  transaction-via-cp is incredibly gross,
> you can get most of the benefit with a two-line patch to move it onto
> tmpfs (as we have done for quite some time).
>   
you're still writing inside a database on a ram filesystem ...  this is 
just a band-aid solution.
> > same thing that the ocaml code does become trivial in C. either you need 
> > to modify every operation to understand some kind of modification list 
> > so that the tree get modified only at commit time (compare to now, at 
> > every operations)
> >     
> Well exactly. It's hot air since I haven't actually written it, but a
> modification list doesn't seem particularly complex to me.
>   
Well that's only half the problem (dare i say the easy part ?), you 
still need to merge 2 xenstored databases together in a clever way 
without issuing a EAGAIN to the connection when it's possible (most of 
the cases).
--
Vincent

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