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How to connect to a replica set in mongodump?
To connect to a replica set to export its data, you can either: Specify the replica set name and members in the –uri connection string: Specify the replica set name and members in the –host: By default, mongodump reads from the primary of the replica set. To override the default, you can specify the read preference:
What are the mechanics of replication in MongoDB?
For more information on replication mechanics, see Replica Set Oplog and Replica Set Data Synchronization. Starting in version 4.2 (also available starting in 4.0.6), secondary members of a replica set now log oplog entries that take longer than the slow operation threshold to apply.
Which is the latest version of mongodump server?
Online Archive automatically archives infrequently accessed data to fully-managed S3 buckets for cost-effective data tiering. Starting with MongoDB 4.4, mongodump is now released separately from the MongoDB Server and uses its own versioning, with an initial version of 100.0.0.
Why does mongodump push data out of memory?
If your data is larger than system memory, the mongodump will push the working set out of memory. mongodump automatically creates FIPS-compliant connections to a mongod / mongos that is configured to use FIPS mode.
How does mongodump affect the performance of mongod?
When run against a mongod instance that uses the WiredTiger storage engine, mongodump outputs uncompressed data. mongodump can adversely affect performance of the mongod. If your data is larger than system memory, the mongodump will push the working set out of memory.
How big is the replica set OpLog in MongoDB?
When you start a replica set member for the first time, MongoDB creates an oplog of a default size if you do not specify the oplog size. [1] The default oplog size depends on the storage engine: The default oplog size is 192 MB of either physical memory or free disk space depending on the storage engine:
Which is the latest version of MongoDB dump?
For example, if your dump was created from a MongoDB Server running version 4.4.x, be sure that the MongoDB Server you are restoring to is also running version 4.4.x. In addition, ensure that you are using the same version of mongorestore to load the data files as the version of mongodump that you used to create them.