Re: [Xen-devel] [PATCH 4 of 4] Linux/xencommons: Use oxenstored by default when available

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sun, 2011-12-11 at 18:10 +0000, Roger Pau Monnà wrote:
> 2011/12/9 Ian Campbell <ian.campbell@xxxxxxxxxx>:
> > # HG changeset patch
> > # User Ian Campbell <ian.campbell@xxxxxxxxxx>
> > # Date 1323448636 0
> > # Node ID 3b7ac401f144206c30440fbb41c74b13fa20b8cb
> > # Parent  74f94e15bfe1dad412d0342aeabdbd895657f54f
> > Linux/xencommons: Use oxenstored by default when available
> >
> > oxenstored is an ocaml implementation of the xenstore daemon. It is faster,
> > more scalable and more reliable than the C xenstored.
> 
> This means that C xenstore is going the way of the Dodo? Or are we
> going to maintain both implementations (ocalm and C)?

I honestly don't know.

They are both reasonably low maintenance and rarely change or have bugs
reported. We don't actually see many bug reports about C xenstored
although it's short comings only tend to become apparent at scale and I
suspect lots of people use workarounds like nuking the tdb on boot
and/or putting it on a tmpfs.

On the other hand having two code bases providing the same service has
its own downsides.

I expect our (or at least my) first response to a non-obvious bug report
in C xenstored would be "have you tried oxenstored?".

FWIW my intention (when I eventually get to it and resurrect those
patches) is for stub-xenstored to be an oxenstored only thing.

Ian.


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