October 2017
Intermediate to advanced
226 pages
6h 56m
English
Content preview from MongoDB Administrator's Guide
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How it works...
Taking backups of a sharded cluster is a bit nuanced, as it involves ensuring certain steps are considered before planning a backup strategy. For starters, we need to stop the balancer. We begin by connecting to mongos server and stopping the balancer, as shown in step 1. Next, in step 2, we use mongodump to take a backup of the config server. In a production environment, prior to executing a mongodump, it is suggested to connect to the config server replica set secondary, issue a db.fsyncLock() and rs.slaveOk(). This ensures that there are no writes to the config database, of the given replica set and we are able to read from it. Next, in step 3, we connect to each shard (our example only has one shard member) and execute ...
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