Re: [Xen-devel] [xs-devel] blktap3 / tapdisk3 development

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 02/10/2014 10:41, Thanos Makatos ha scritto:
> > It seems upcoming XenServer 6.5 "Creedence" is going to use blktap3 /
> > tapdisk3 after all, so if i understand this correctly blktap3 is being developed
> > "only for XenServer", right?
> Correct, although it shouldn't be too much work for making it work on upstream 
> Xen.
>
> > Many interested persons have been asking on mailing lists and on IRC about
> > the status of blktap3 development.
> > Is it possible for someone from Citrix/XenServer to comment about this?
> >
> > I know there's a blog post about blktap3/tapdisk3 performance
> > (improvements) here:
> > http://xenserver.org/blog/entry/tapdisk3
> >
> > One of the interested developers is CC'd on this email. He has written
> > RBD/Ceph support patch for blktap2, and he's interested in porting that to
> > blktap3/tapdisk3..
> >
> > Also is this the correct repo with latest blktap3/tapdisk3 bits in it?:
> > https://github.com/xapi-project/blktap
> blktap3 is actively developed and is the I/O default data path in XenServer 6.5. The repo you 
> mention is the right one (https://github.com/xapi-project/blktap, git branch "xs64bit", 
> but we'll soon bring the "master" branch up to date. I'd be more than happy to assist you 
> and the developer in porting that patch to blktap3!
Sorry for a my probably stupid question.
Why not use qdisk (that have very good performance, support many formats 
and is supported also by other project) and improve it if needed instead 
do/maintain another project xen-only?
FWIK the only thing in what blktab is better is vhd support (not vhdx).

Thanks for any reply and sorry for my bad english.

> Cheers
>
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