rados df with nautilus / bluestore

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Hi

we found a very ugly issue in rados df

I have several clusters, all running ceph nautilus (14.2.11), We have
there replicated pools with replica size 4.

On the older clusters "rados df" shows in the used column the net used
space. On our new cluster, rados df shows in the used column the gross
used space.

The older clusters was upgraded from luminous (and before) and uses
filestore and the new cluster is initally deployed with nautilus and
bluestore.

why are the outputs different? Is this related with nautilus or with
bluestore? For our reporting this values have a significant relevance
and now I am running in such discrepancies.

What commands/metrics can I use to get more reliable values. Maybe "ceph
df detail"?


Manuel
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