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by ongardie
4058 days ago
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Compaction in LogCabin uses a snapshotting approach. It writes a header to a snapshot file, then forks off a child process to write the data into a snapshot. The data is just each node in the tree serialized as a protobuf using a pre-order traversal, IIRC. Much more detail on compaction [1] mentioning LogCabin explicitly. LogCabin does currently keep all data in memory, so it never touches disk for read requests. It also keeps a copy of the entire log in memory for now, but I hope to address that eventually [2]. [1] https://github.com/ongardie/dissertation#readme [2] https://github.com/logcabin/logcabin/issues/106 |
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