> Op 8 februari 2016 om 14:44 schreef Jason Dillaman <dillaman@xxxxxxxxxx>: > > > The 'rbd du' utility actually just performs a diff operation on the image [1]. > If the image doesn't have the _FAST_DIFF feature enabled, this operation will > require scanning all potential objects in the RBD image. > Thanks! How does this look: https://github.com/wido/libvirt/commit/16817a46b6948bd97968712d4865299da54b4fff If all good I'll send it to libvirt upstream. Wido > [1] > https://github.com/ceph/ceph/blob/master/src/tools/rbd/action/DiskUsage.cc#L58 > > -- > > Jason Dillaman > > > ----- Original Message ----- > > From: "Wido den Hollander" <wido@xxxxxxxx> > > To: "ceph-devel" <ceph-devel@xxxxxxxxxxxxxxx> > > Sent: Saturday, February 6, 2016 2:57:23 AM > > Subject: RBD image usage with librbd (rbd du) > > > > Hi, > > > > I'm working on libvirt again and for volumes libvirt has a 'capacity' and > > 'allocation'. > > > > Until recently both were set to the size of the RBD image since it was not > > possible to fetch the allocation of a image. > > > > We now have 'rbd du' and this uses a librbd call to fetch the real usage of > > a > > image. > > > > What is the best way to fetch the 'allocation' of a RBD image using librbd > > (C)? > > rbd_stat() won't tell and looking through librbd.h I don't know which > > function > > to use. > > > > Thanks, > > > > Wido > > -- > > 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 > > > -- > 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 -- 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
