sh._lastMigration()¶

sh._lastMigration(namespace)¶

参数:	namespace (string) – The name of a database or collection within the current database.
返回:	A document with fields detailing the most recent migration in the specified namespace.

sh._lastMigration() returns a document with details about the last migration performed on the database or collection you specify.

Document details:

Fields:

_id (string) – The id of the migration task
server (string) – The name of the server
clientAddr (string) – The IP address and port number of the server.
time (ISODate) – The time of the last migration.
what (string) – The specific type of migration.
ns (string) – The complete namespace of the collection affected by the migration.
details (document) – A document containing details about the migrated chunk. Includes min and max sub-documents with the bounds of the migrated chunk.