radosgw-admin sync status output

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All;

We've been running our Ceph clusters (Nautilus / 14.2.8) for a while now (roughly 9 months), and I've become curious about the output of the "radosgw-admin sync status" command.

Here's a the output from our secondary zone:
          realm <guid> (<realm-name>)
      zonegroup <guid> (<zonegroup name>)
           zone <guid> (<zone name>)
  metadata sync syncing
                full sync: 0/64 shards
                incremental sync: 64/64 shards
                metadata is caught up with master
      data sync source: <guid> (<master zone name>)
                        syncing
                        full sync: 0/128 shards
                        incremental sync: 128/128 shards
                        3 shards are recovering
                        recovering shards: [39,41,66]

Radosgw is in use, so the active recovery for data doesn't really surprise me.

What I am curious about is these 2 lines:
full sync: 0/64 shards
full sync: 0/128 shards

Is this considered normal?  If so, why have those lines present in this output?
Are they relevant to a different type of replication than what we are doing (I'm not aware of a different type of radosgw replication, but I'm not omniscient)?

Thank you,

Dominic L. Hilsbos, MBA 
Director - Information Technology 
Perform Air International Inc.
DHilsbos@xxxxxxxxxxxxxx 
www.PerformAir.com


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