Sharded-cluster deployment
========================== 

Using MognoDB 5.0
-----------------

mongos> db.createCollection("coll1")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988164, 4),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1641988164, 4)
}
mongos> db.createCollection("coll1")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988167, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1641988164, 4)
}

mongos> db.coll1.insert({ "name": "Antonio" })
WriteResult({ "nInserted" : 1 })
mongos> db.createCollection("coll1")
{
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988213, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1641988205, 1)
}

mongos> db.coll1.createIndex({ "idx": 1 } )
{
	"raw" : {
		"__unknown_name__-rs0/ip-10-122-3-33:20000" : {
			"numIndexesBefore" : 1,
			"numIndexesAfter" : 2,
			"createdCollectionAutomatically" : false,
			"commitQuorum" : "votingMembers",
			"ok" : 1
		}
	},
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988250, 5),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1641988250, 5)
}
mongos> db.coll1.createIndex({ "idx": 1 } )
{
	"raw" : {
		"__unknown_name__-rs0/ip-10-122-3-33:20000" : {
			"numIndexesBefore" : 2,
			"numIndexesAfter" : 2,
			"note" : "all indexes already exist",
			"ok" : 1
		}
	},
	"ok" : 1,
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988250, 5),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	},
	"operationTime" : Timestamp(1641988250, 5)
}

Summary:
* Creating a collection of which an empty collection already exists: { "ok" : 1, ... } // INCONSISTENCY; Reverting we would have the same behaviour as mongod
* Creating a collection of which a non empty collection exists:      { "ok" : 1, ... } // INCONSISTENCY; Reverting we would have the same behaviour as mongod
* Creating an index that already exists:                             { "ok" : 1, "raw.ok" : 1, "raw.note" : "all indexes already exist", ... }


Using MognoDB 3.6.23
--------------------

mongos> db.createCollection("coll1")
{
	"ok" : 1,
	"operationTime" : Timestamp(1641988452, 7),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988452, 7),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}
mongos> db.createCollection("coll1")
{
	"ok" : 0,
	"errmsg" : "a collection 'db1.coll1' already exists",
	"code" : 48,
	"codeName" : "NamespaceExists",
	"operationTime" : Timestamp(1641988452, 7),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988452, 7),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}

mongos> db.coll1.insert({ "name": "Antonio" })
WriteResult({ "nInserted" : 1 })
mongos> db.createCollection("coll1")
{
	"ok" : 0,
	"errmsg" : "a collection 'db1.coll1' already exists",
	"code" : 48,
	"codeName" : "NamespaceExists",
	"operationTime" : Timestamp(1641988573, 1),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988573, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}

mongos> db.coll1.createIndex({ "idx": 1 } )
{
	"raw" : {
		"ip-10-122-3-33:20001" : {
			"createdCollectionAutomatically" : false,
			"numIndexesBefore" : 1,
			"numIndexesAfter" : 2,
			"ok" : 1
		}
	},
	"ok" : 1,
	"operationTime" : Timestamp(1641988633, 1),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988633, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}
mongos> db.coll1.createIndex({ "idx": 1 } )
{
	"raw" : {
		"ip-10-122-3-33:20001" : {
			"numIndexesBefore" : 2,
			"numIndexesAfter" : 2,
			"note" : "all indexes already exist",
			"ok" : 1
		}
	},
	"ok" : 1,
	"operationTime" : Timestamp(1641988633, 1),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1641988633, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}

Summary:
* Creating a collection of which an empty collection already exists: { "ok" : 0, "errmsg" : "a collection 'db1.coll1' already exists", ... }
* Creating a collection of which a non empty collection exists:      { "ok" : 0, "errmsg" : "a collection 'db1.coll1' already exists", ... }
* Creating an index that already exists:                             { "ok" : 1, "raw.ok" : 1, "raw.note" : "all indexes already exist", ... }