| Custodian is responsible for the data stored in CouchDB databases. | |
| Custodian scans the shards database, which details the location of | |
| every shard of every database and ensures that operators are aware of | |
| any shard that is under-replicated (has less than N copies). | |
| Custodian accounts for data in transit (as indicated by the | |
| mem3.redirects section) as well as nodes not recently known to be up. |