On Wed, 10/08 13:15, Alexandre DERUMIER wrote: > Hi, > > I'm currently planning to migrate our storage to ceph/rbd through qemu drive-mirror > > and It seem that drive-mirror with rbd block driver, don't create a sparse image. (all zeros are copied to the target rbd). > > Also note, that it's working fine with "qemu-img convert" , the rbd volume is sparse after conversion. What is the source format? If the zero clusters are actually unallocated in the source image, drive-mirror will not write those clusters either. I.e. with "drive-mirror sync=top", both source and target should have the same "qemu-img map" output. Fam > > > Could it be related to the "bdrv_co_write_zeroes" missing features in block/rbd.c ? > > (It's available in other block drivers (scsi,gluster,raw-aio) , and I don't have this problem with theses block drivers). > > > > Regards, > > Alexandre Derumier > > > -- 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
