Space available reported on Ceph file system

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Hi,
I have a test cluster of 80Tb raw.
My pools are using rep size = 2, so the real storage capacity is 40Tb
but I see in pgmap a total of 80Tb available and also the cephfs
mounted on a client reports 80Tb available too
I would expect to see somewhere a "40Tb available"

Is this behavior correct?
Thanks

pool 0 'data' rep size 2 crush_ruleset 0 object_hash rjenkins pg_num
2880 pgp_num 2880 last_change 1 owner 0 crash_replay_interval 45

pgmap v796: 8640 pgs: 8640 active+clean; 8913 bytes data, 1770 MB
used, 81489 GB / 81491 GB avail; 229B/s wr, 0op/s

root@client1 ~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
192.168.21.12:6789:/   80T  1,8G     80T   1% /mnt/ceph

--
Marco Aroldi
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