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Akka Event Log

A distributed commit log, inspired by Apache Kafka. It uses Akka Cluster to manage communication between nodes. Its goal is to support an event based stream, than can be replayed as a whole or entity by entity.

NOTE: This is by no means a complete project, neither I plan to complete it anytime soon.

How to run it

  • To start a node, use ./start-node.sh [node_number]. This will create an instance that listens on TCP port 7000+n
  • To produce a test record, use ./produce.sh
  • To start a consumer, use ./consume.sh

Next steps

  • Support replication.
  • Support partitioning. Right now topics can have only one partition.
  • Create configurable utilities to produce and consume data.
  • Handle cluster-related scenarios (split brain, node failures, etc).
  • Create persistent metadata for topics (right now topic information is stored using a CRDT. This means that as long as one node is up, topics metadata will be fine. But if all nodes die and only a part of them are restarted, you might lose information about some topics).
  • Support multiple topics.
  • Support indexing of single entities.

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