Tan xinyu reassigned IOTDB-567:

    Assignee:     (was: Tan xinyu)

> Apache IoTDB's Peer Tracker for The Raft Protocol [distributed]
> ---------------------------------------------------------------
>                 Key: IOTDB-567
>                 URL: https://issues.apache.org/jira/browse/IOTDB-567
>             Project: Apache IoTDB
>          Issue Type: Task
>          Components: Core/Cluster
>            Reporter: Xiangdong Huang
>            Priority: Major
>              Labels: IoTDB, gsoc2020, mentor
> IoTDB is a highly efficient time-series database, which supports high-speed 
> query process, including aggregation query.
> Currently, clustered IoTDB is under close development. It now supports leader 
> election, log replication, cluster membership change, and log compaction. We 
> are testing and optimizing these features these days.
> However, we have not yet implemented log status tracking for peers, which 
> leads to the fact that when sending the logs, the logs required by a peer may 
> not be immediately sent correctly, resulting in wasted bandwidth and possible 
> errors.
> So there are two improvements about peer tracker need to be done:
> 1.implement a peer tracker to track follower's log status. You can borrow 
> from other projects or design your own, as long as it's right.
> 2.you should also dynamically maintain the peer tracker on the current design 
> and handle possible conflicting inconsistencies, this requires a little 
> understanding of IoTDB’s raft log module.
> This proposal is mainly for implementing and maintaining a peer tracker in 
> clustered IoTDB. 
> It is necessary for you to understand that correctness is the most important 
> thing.
> You should know:
>  - IoTDB cluster structure
>  - IoTDB raft RPC module
>  - IoTDB raft log module
>  - Raft
>  - Java
> difficulty: Major
> Mentor:
> jt2594...@163.com, h...@apache.org

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