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src-kafka/core
Vikas Singh
57baa4079d
A `Partition` object contain one or many `Replica` objects. These replica objects in turn can have the "log" if the replica corresponds to the local node. All the code in Partition or ReplicaManager peek into replica object to fetch the log if they need to operate on that. As replica object can represent a local replica or a remote one, this lead to a bunch of "if-else" code in log fetch and offset update code. NOTE: In addition to a "log" that is in use during normal operation, if an alter log directory command is issued, we also create a future log object. This object catches up with local log and then we switch the log directory. So temporarily a Partition can have two local logs. Before this change both logs are inside replica objects. This change is an attempt to untangle this relationship. In particular it moves `Log` from `Replica` into `Partition`. So a partition contains a local log to which all writes go and possibly a "future log" if the partition is being moved between directories. Additionally, it maintains a list of remote replicas for offset and "caught up time" data that it uses for replication protocol. Reviewers: José Armando García Sancio <jsancio@users.noreply.github.com>, Jason Gustafson <jason@confluent.io> |
5 years ago | |
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src | KAFKA-8457; Move `Log' reference from `Replica` into `Partition` (#6841) | 5 years ago |
.gitignore |
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