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Updates to movePrimary command page #1736

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Updates to movePrimary command page #1736

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ccbfb59
Updates to movePrimary command page
rueckstiess Apr 18, 2014
704da46
Update movePrimary.txt
rueckstiess Apr 18, 2014
862678a
Update movePrimary.txt
rueckstiess Apr 18, 2014
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10 changes: 9 additions & 1 deletion source/reference/command/movePrimary.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ movePrimary

.. important:: Only use :dbcommand:`movePrimary` when:

- the database does not contain any collections with data, *or*
- the database does not contain any collections, *or*

- you have drained all sharded collections using the
:dbcommand:`removeShard` command.
Expand All @@ -35,3 +35,11 @@ movePrimary
When the command returns, the database's primary location will
shift to the designated :term:`shard`. To fully decommission a
shard, use the :dbcommand:`removeShard` command.

If the :dbcommand:`movePrimary` command moves any un-sharded collections
in the process, all :program:`mongos` instances need to be restarted
or the :dbcommand:`flushRouterConfig` command needs to be invoked on all
:program:`mongos` instances before writing any data, to notify them of the
primary shard change. If this process is not followed, data may end up being
written to the incorrect shard and appears to be missing without manual
efforts to correct this.