Re: [PATCH 0/4] nfs41: allow layoutget at pnfs_do_multiple_writes

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That would be pretty disappointing.  However, based on previous interactions, my belief would be, the
Linux client will do what can be shown empirically to work better, or more correctly.

Matt

----- "Trond Myklebust" <Trond.Myklebust@xxxxxxxxxx> wrote:

> On Tue, 2011-11-29 at 14:40 -0800, Boaz Harrosh wrote: 
> > On 11/29/2011 01:57 PM, Trond Myklebust wrote:
> > >> Also Files when they will support segments and servers that
> request segments,
> > >> like the CEPH server, will very much enjoy the above, .i.e: Tell
> me the amount
> > >> you know you want to write.
> > > 
> > > Why would we want to add segment support to the pNFS files
> client???
> > > Segments are a nuisance that multiply the amount of unnecessary
> chitchat
> > > between the client and the MDS without providing any tangible
> > > benefits...
> > > 
> > 
> > Your kidding right?
> > 
> > One: it is mandated by the Standard, This is not an option. So a
> perfectly
> >      Standard complaint server is not Supported by Linux because we
> don't see
> >      the point.
> 
> Bollocks.. Nothing is "mandated by the Standard". If the server
> doesn't
> give us a full layout, then we fall back to write through MDS. Why
> dick
> around with crap that SLOWS YOU DOWN.
> 
> > Two: There are already file-layout servers out there (multiple)
> which are
> >      waiting for the Linux files-layout segment support, because the
> underline
> >      FS requires Segments and now they do not work with the Linux
> client. These
> >      are CEPH and GPFS and more.
> 
> Then they will have a _long_ wait....
> 
> Trond
> 
> -- 
> Trond Myklebust
> Linux NFS client maintainer
> 
> NetApp
> Trond.Myklebust@xxxxxxxxxx
> www.netapp.com

-- 

Matt Benjamin

The Linux Box
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Ann Arbor, MI  48104

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