Hello. I'm not sure that this list is correct to ask the following question. It would be nice to understand the architecture of Ceph. To do this i want to find answers for the following questions: 1. Ceph supports 2 types of scrubbing. To do check need to calculate something and compare the result and the previously stored value. If i understand correctly Ceph uses crc32. Where the value is stored? 2. Where can i read (in details) about data placement (structure)? only sources? 3. I tried to find information about behavior of Ceph in case of failures? For example I put a data to Ceph. Placement logic has done its work and we know where need to place the data. We send data to primary OSD and it resend the data to the secondary OSDs. At some point a primary OSD fails. What next? Need to call CRUSH again? 4. What is the minimal structure of data in Ceph? object or object-chunk? 5. Where object-metadata is stored? as a separate metadata-object or as a part of object structure? Thanks. -- 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
