On Fri, Jun 12, 2015 at 1:07 AM, Paweł Sadowski <ceph@xxxxxxxxx> wrote: > Hi All, > > I'm testing erasure coded pools. Is there any protection from bit-rot > errors on object read? If I modify one bit in object part (directly on > OSD) I'm getting *broken*object: Sorry, are you saying that you're getting a broken object if you flip a bit in an EC pool? That should detect the chunk as invalid and reconstruct on read... -Greg > > mon-01:~ # rados --pool ecpool get `hostname -f`_16 - | md5sum > bb2d82bbb95be6b9a039d135cc7a5d0d - > > # modify one bit directly on OSD > > mon-01:~ # rados --pool ecpool get `hostname -f`_16 - | md5sum > 02f04f590010b4b0e6af4741c4097b4f - > > # restore bit to original value > > mon-01:~ # rados --pool ecpool get `hostname -f`_16 - | md5sum > bb2d82bbb95be6b9a039d135cc7a5d0d - > > If I run deep-scrub on modified bit I'm getting inconsistent PG which is > correct in this case. After restoring bit and running deep-scrub again > all PGs are clean. > > > [ceph version 0.94.1 (e4bfad3a3c51054df7e537a724c8d0bf9be972ff)] > > > -- > PS > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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