Ceph » rgw

A scenario that we can run into is that a bucket appears in the reshard list, but is manually resharded to higher count. However the next cycle of dynamic resharding picks up the bucket and reshards to the original count.

# radosgw-admin reshard list 
    {
        "time": "2020-04-17T15:02:39.002488Z",
        "tenant": "",
        "bucket_name": "bucket5",
        "bucket_id": "b695b662-4453-4c86-85c6-119bdbfe30ef.16309.4",
        "new_instance_id": "",
        "old_num_shards": 1,
        "new_num_shards": 31
    }
]

# radosgw-admin bucket reshard --bucket bucket5 --num-shards 103

(successful reshard)
# radosgw-admin reshard process 

Now we'll end up with the 31 shards again as the second process from the original queue still executes.