Technical overview of the database

Evan · April 20, 2018, 5:13pm

Besides diagrams I posted above, I added some documentation that just has not been built yet.

apple/foundationdb/blob/master/documentation/sphinx/source/kv-architecture.rst

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FoundationDB Architecture
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Coordinators
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All clients and servers connect to a FoundationDB cluster with a cluster file, which contains the IP:PORT of the coordinators. Both the clients and servers use the coordinators to connect with the cluster controller. The servers will attempt to become the cluster controller if one does not exist, and register with the cluster controller once one has been elected. Clients use the cluster controller to keep an up-to-date list of proxies.

Cluster Controller
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The cluster controller is a singleton elected by a majority of coordinators. It is the entry point for all processes in the cluster. It is responsible for determining when a process has failed, telling processes which roles they should become, and passing system information between all of the processes.

Master
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The master is responsible for coordinating the transition of the write sub-system from one generation to the next. The write sub-system includes the master, proxies, resolvers, and transaction logs. The three roles are treated as a unit, and if any of them fail, we will recruit a replacement for all three roles. The master provides the commit versions for batches of the mutations to the proxies, runs data distribution algorithm, and runs ratekeeper.

Proxies

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Technical overview of the database

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