Does the hint not go into the pg log? Which could be retried on an older OSD? On Thu, Sep 11, 2014 at 1:33 PM, Samuel Just <sam.just@xxxxxxxxxxx> wrote: > That part is harmless, the transaction would be recreated for the new > acting set taking into account the new acting set features. It > doesn't have any actual affect on the contents of the object. > -Sam > > On Thu, Sep 11, 2014 at 1:30 PM, Gregory Farnum <greg@xxxxxxxxxxx> wrote: >> On Thu, Sep 11, 2014 at 1:19 PM, Samuel Just <sam.just@xxxxxxxxxxx> wrote: >>> http://tracker.ceph.com/issues/9419 >>> >>> librbd unconditionally sends set_alloc_hint. Do we require that users >>> upgrade the osds first? Also, should the primary respond with >>> ENOTSUPP if any replicas don't support it? >> >> Something closer to the second option, I think...but then you run into >> the problem where maybe the PG gets moved from a set of new OSDs to a >> set of old ones that don't support the op. :/ I think for anything >> that goes to disk you need to go through a full features-in-the-osdmap >> process like we did for erasure coding. >> -Greg >> Software Engineer #42 @ http://inktank.com | http://ceph.com -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
