Hello, Some basic Ceph questions, would appreciate your help:) Sorry about the number and detail in advance! a. Ceph RADOS is strongly consistent and different from usual object, does that mean all metadata also, container and account etc is all consistent and everything is updated in the path of the client operation itself, for a single site? b. If it is strongly consistent, is that the case across sites also? How can it be performant across geo sites if that is the case? If its choosing consistency over partitioning and availability...For object, I read somewhere that it is now eventually consistent(local CP, remotely AP) via DR. Gets a bit confusing with all the literature out there. If it is DR, isnt that slightly different from the Swift case? c. For block, is it CP on a single site and then usual DR to another site using snapshotting? d. For block, is it just a linux block device or is it SCSI? Is it a custom device driver running within Linux which hooks into the block layer? Trying to understand the layering diagram. e. Do the snapshot, compression features come from the underlying file system? f. What is the plan for deduplication? If that comes from the local file system, how would it deduplicate across nodes to achieve the best dedup ratio? TIA, MW _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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