Hi Dev Team, I'm writing to discuss the auto balancing feature in IoTDB, which currently is operational for data region. This feature is designed to optimize resource use, maximize throughput, minimize response time, and prevent overloading on any individual resource.
However, it's presently inactive by default for the schema region.The initial rationale for this decision was based on the instability observed in the underlying consensus (Ratis) during leader transitions. In scenarios where a leader election failed, the previous leader was forced to step down and the new leader is not elected out. This situation may led to temporary unavailability in the schema region. Encouragingly, with the upgrade to Ratis 3.0.0, ratis community introduced a notable enhancement in leader transition processes. 3.0.0 facilitates smoother transitions between nodes and we've successfully incorporated as detailed in our recent PR: https://github.com/apache/iotdb/pull/11785 Given these advancements, I propose we revisit our current settings for the schema region. Specifically, I recommend enabling the auto balance feature by default for the schema region. What do you think? Best regards, Ziyang
