Henrik Ingo
MongoDB
Henrik Ingo has worked 4 years at MongoDB. Initially as a Solutions Architect working with European customers, he's now in R&D on the performance team. Prior to MongoDB he was active — and an activist — in the MySQL space, and employed by MySQL (MySQL NDB Cluster team), MariaDB and Galera Cluster. Henrik is the author of the book "Open Life: The Philosophy of Open Source"
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MongoDB 3.2 introduced a new replication protocol: version 1, or pv1 for short. While still similar to the original replication protocol (pv0), it adds some robustness improvements found in the Raft algorithm. Raft is an algorithm introduced in a series of academic publications by Diego Ongaro. It's a short and simple leader-based replication algorithm, popular in particular due to its design goal of being remarkably simpler than Paxos and other predecessors.
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This is the classic MongoDB tutorial for beginners, where you can learn about the JSON and JavaScript based MongoDB query language, as well as how to design schemas in a document based data model. This tutorial has been a popular way to learn something new — and a new way to think — for people that have strong experience with relational databases.
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