question about mongodb


Configuring shared: What will happen if we lose a node? do we lose the entire base?
• What is happening in case of write conflict? are we able to rebuild the database from a source (Primary storage)?


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Dung DinhDBA and Business Intelligence DeveloperCommented:
High Availability and Scalability solution in MongoDB, we should often combine Replication and Sharding. For example, we will have three shards. In each shard, we implement Replication solution. This makes sure that the entire base is not lost.

>> What is happening in case of write conflict?
MongoDB has locking mechanism and other concurrency control measure to prevent multiple clients from modifying the same piece of data.

>>are we able to rebuild the database from a source
Yes, we can use some BACKUP / RESTORE methods in MongoDB.

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