February 2019
Beginner to intermediate
544 pages
14h 36m
English
Content preview from Mastering Hadoop 3
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MongoDB connector
MongoDB is a document storage database that provides scalability, high availability, and high performance. Mongo collections are used as Presto tables and users can execute SQL-like queries over these. To set up the Mongo connector, we must have mongo.properties in the catalog directory by adding the following properties to it:
connector.name=mongodb mongodb.seeds=host1,hostname:port
There are a few other properties that can be set in the catalog properties and they are:
- mongodb.min-connections-per-host: The minimum number of connections that can be reserved for the Mongo client. The default is 0, which can be changed if needed.
- mongodb.max-connections-per-host: The maximum number of connections allowed for a Mongo client. ...
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