October 2017
Intermediate to advanced
226 pages
6h 56m
English
Content preview from MongoDB Administrator's Guide
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When upgrading a sharded cluster, your sequence of steps should be as follows:
- Log in to the mongos shell and stop the balancer using the sh.stopBalancer() command.
- First upgrade the config server replica set.
- Upgrade each shard individually.
- Upgrade the mongos query routers.
- Finally, connect the mongos shell and start the balancer using the sh.startBalancer() command.
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