Hi, As lots of fiemap issues in XFS, fiemap is default disabled now, especially in Hammer, before seek_data, seek_hole is added. But disabling fiemap feature will cause a small sparse object become a large full object during PushOps, which may lead to notably data in-balance between OSD, especially on the new added OSD during data rebalance. With those full objects, some OSDs may simultaneously becomes full. Furthermore, currently, it is impossible to make the full objects sparse again if we enable the fiemap feature in the future. So I think if any solutions to make a full object back to a sparse object again? One of the idea is to check whether the content in the object contains consecutive zero and punch zeros for those object during deep-scrub, is that possible and reasonable? Regards Ning Yao -- 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
