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Type: Improvement
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Resolution: Won't Fix
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Priority: Major - P3
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Affects Version/s: None
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Component/s: production
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Labels:None
There is currently a documentation page that outlines how to restore a sharded environment onto the same cluster:
http://docs.mongodb.org/v2.4/tutorial/restore-sharded-cluster/
There is some small mention made there of changing hostnames.
However, the procedure as a whole is not entirely suitable for restoring a complete sharded cluster backup (including config servers) onto a fresh sharded environment.
There are also several caveats - such as the new mongos will at first try to reach the old shard servers - that need to be addressed as well.