On Fri, 9 Jan 2015, Gregory Farnum wrote:
> On Fri, Jan 9, 2015 at 10:00 AM, Sage Weil <sw...@redhat.com> wrote:
> > On Fri, 9 Jan 2015, Gregory Farnum wrote:
> >> On Fri, Jan 9, 2015 at 7:20 AM, Sage Weil <sw...@redhat.com> wrote:
> >> > Should we drop this entirely in hammer?
> >>
> >> Yes!
> >>
> >> >  If I remember correctly all of
> >> > the layout stuff is fully supported using virtual xattrs and standard
> >> > tools.  The only thing left is the tool that shows you how file blocks 
> >> > map
> >> > to objects map to OSDs (or something like that), which I've never used 
> >> > and
> >> > have never seen anyone use...
> >>
> >> ...oh, hmmm. Actually there have been people using that tool
> >> occasionally over the years, and I don't think we provide any other
> >> way to learn that information (besides calculating it yourself,
> >> obviously).
> >> Perhaps we could extend the vxattr interface to include that
> >> information as well?
> >
> > Actually, I think Andreas's librados stuff he's working on may be the
> > right path... it'll expose general information about object -> pg ->
> > osd mappings.  Then a simple script could take the ino + file size, turn
> > it into object names, and use that.
> >
> > In any case, I don't mind nuking this and waiting for a complaint before
> > investing in replacing that bit of functionality since it's such a small
> > thing...
> 
> Yeah, that's fine with me, but I'd like some idea of how we'd suggest
> any users who complain do the implementation so we can point them at a
> ticket if they do complain. ;)

Email thread subject:

RFC: new rados whereis command

Earlier pull requests:

https://github.com/ceph/ceph/pull/2729
https://github.com/ceph/ceph/pull/2730

There isn't a redmine ticket since it originated as a PR.

sage
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