Re: [Qemu-devel] [PATCH v3 2/2] qapi: add read-pattern support for quorum

[Liu Yuan <namei.unix@gmail.com>]

On Wed, Jul 16, 2014 at 10:22:20AM +0800, Liu Yuan wrote:
> On Tue, Jul 15, 2014 at 06:22:14AM -0600, Eric Blake wrote:
> > On 07/15/2014 12:34 AM, Liu Yuan wrote:
> > > Cc: Eric Blake <eblake@redhat.com>
> > > Signed-off-by: Liu Yuan <namei.unix@gmail.com>
> > > ---
> > >  qapi/block-core.json | 19 ++++++++++++++++++-
> > >  1 file changed, 18 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/qapi/block-core.json b/qapi/block-core.json
> > > index e378653..22491bc 100644
> > > --- a/qapi/block-core.json
> > > +++ b/qapi/block-core.json
> > > @@ -1384,6 +1384,18 @@
> > >              'raw': 'BlockdevRef' } }
> > >  
> > >  ##
> > > +# @QuorumReadPattern
> > > +# An enumeration of quorum read pattern.
> > 
> > s/pattern/patterns/
> > 
> > > +#
> > > +# @quorum: read all the children and do a quorum vote on reads
> > > +#
> > > +# @fifo: read a single child and try next child in FIFO order if read fails.
> > 
> > Inconsistent on whether you are ending a line with '.'.  I'm not quite
> > sure if this reads well; maybe:
> > 
> > @fifo: read only from the first child that has not failed
> > 
> > I also wonder if 'single' might be a better name than 'fifo', especially
> > if we later add a 'round-robin' for read load balancing.
> 
> Both fifo and round-robin in our context indicate a single read.
> 
> but either one looks okay to me. We need to reach agreement on the name before I
> send the next version, single or fifo or any other suggested, Benoit, Kevin,
> Stefan?

Cc others mentioned.