A replica set in MongoDB is a group of mongod processes that maintain the same data set. Replica sets provide redundancy and high availability, and are the basis for all production deployments. This section int
In MongoDB, the replication process can be set up by creating a replica set. In MongoDB, a replica set contains multiple MongoDB servers. In this group of MongoDB servers, one server is known as a Primary Server and others are known as Secondary servers. Every secondary server alwa...
4. Then create one more environment withMongoDBdatabase in the same way as it is described above or just clone the already existing one, specifying the desired environment’s name (e.g.mongo-slave) in the appropriate frame. MongoDB in this environment will be your standby database. In cas...
Starting in version 2.0, MongoDB supports chained replication. A chained replication occurs when a secondary member replicates from another secondary member instead of from the primary. This might be the case, for example, if a secondary selects its replication target based on ping time and if ...
mongodb://127.0.0.1:27117,127.0.0.1:27118 And if you are .NET developer there is a sample READ/WRITE data in mongodb cluster here:https://github.com/minhhungit/mongodb-cluster-docker-compose/tree/master/client Notes If you get error "docker.errors.DockerException: Error while fetching serv...
Before joining Percona, Avi worked as a Database Architect at OpenSCG for 2 Years and as a DBA Lead at Dell for 10 Years in Database technologies such as PostgreSQL, Oracle, MySQL and MongoDB. He has given several talks and trainings on PostgreSQL. He has good experience in performing ...
Starting in MongoDB 4.4, mirrored reads are enabled by default and use a default sampling rate of 0.01. To disable mirrored reads, set the mirrorReads parameter to { samplingRate: 0.0 }: db.adminCommand( { setParameter: 1, mirrorReads: { samplingRate: 0.0 } } ) With a sampling rate gre...
replicate-do-db=your_database_name Restart MySQL: Restart the MySQL server on each slave. Step 3: Create Replication User on Master Log in to the master database as a privileged user: CREATE USER 'replication_user'@'slave_ip' IDENTIFIED BY 'password'; ...
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Now that you’ve configured the replication set, the next step is to validate the replication process. To do that, first login to the primary MongoDB node in the replica set. Then you need to create a collection with some sample data using the following commands: ...