I create a rbd named dx-app with 500G, and map as rbd0. But i find the size is different with different cmd:
[root@dx-app docker]# rbd info dx-app rbd image 'dx-app': size 32000 GB in 8192000 objects <==== order 22 (4096 kB objects) block_name_prefix: rbd_data.1206643c9869 format: 2 features: layering flags: create_timestamp: Thu Aug 2 18:18:20 2018 [root@dx-app docker]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 253:0 0 20G 0 disk └─vda1 253:1 0 20G 0 part / vdb 253:16 0 200G 0 disk └─vg--test--data-lv--data 252:0 0 199.9G 0 lvm /test/data vdc 253:32 0 200G 0 disk vdd 253:48 0 200G 0 disk /pkgs vde 253:64 0 200G 0 disk rbd0 251:0 0 31.3T 0 disk /test/docker <==== [root@dx-app docker]# df -Th Filesystem Type Size Used Avail Use% Mounted on /dev/vda1 xfs 20G 14G 6.5G 68% / devtmpfs devtmpfs 7.8G 0 7.8G 0% /dev tmpfs tmpfs 7.8G 12K 7.8G 1% /dev/shm tmpfs tmpfs 7.8G 3.7M 7.8G 1% /run tmpfs tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup /dev/vde xfs 200G 33M 200G 1% /test/software /dev/vdd xfs 200G 117G 84G 59% /pkgs /dev/mapper/vg--test--data-lv--data xfs 200G 334M 200G 1% /test/data tmpfs tmpfs 1.6G 0 1.6G 0% /run/user/0 /dev/rbd0 xfs 500G 34M 500G 1% /test/docker <==== Which is true? Is it normal?
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