![]() ![]() ![]() A MongoDB index stores a small portion of the data set in a form that is convenient to traverse. Indexing: A MongoDB field can be indexed with primary and secondary indices or indexes. To resolve the election of the new primary, three standalone servers must be added as secondary servers.Ģ. Secondary replicas may additionally serve read operations, but the data is only eventually consistent by default. Whenever a primary replica crashes, the replica set automatically determines which secondary should become the primary and conducts an election if necessary. Secondary replicas keep a copy of the data of the primary, preserving it in an orderly manner, as part of a replicated MongoDB system. ![]() A replica-set acts as a primary or a secondary replica. Two or more copies of data constitute a replica set. Replication: The MongoDB replica set feature is known for providing high availability. There have also been instances of ransomware attacks that forced the setting to be turned on by the database administrator.ġ.Because of this, there is a default setting that blocks networked connections to databases if they've not been configured by a database administrator. User authentication isn't enabled by default in MongoDB databases.MongoDB doesn't provide full referential integrity using foreign-key constraints, which could affect data consistency. ![]() Because of this, data writes must be recorded on the master, and new information cannot be added to the database quickly.
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