hi,all there are some questions about ceph. 1) can i get the osd list that hold objects consist of a file by command-line?
2) does ceph support FC or how can i get FC supported in ceph? like we use iscsi target tool to export rbd block device ,so windows can use it as a disk. 3) the question i thought many times, the crush hierarchy is stack,host,device,and the replication level is 2, but if two disks failed in different stack in 5 mins, how can i cut down the risk of data lose to lowest? I thought about disaster backup by building a remote datacenter, but if another two disks also failed in that datacenter? 4) "df -h" on client shows the data stored(include the replicated data) in cluster, not data really used by user. thanks huangjun
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