1. broker主要配置参数：
relica.lag.time.max.ms
auto.leader.rebalance.enable
leader.imbalance.per.broker.percentage
leader.imbalance.check.interval.seconds
log.segment.bytes
log.index.interval.bytes
log.retention.hours
log.retention.minutes
log.retention.ms
log.retention.check.interval.ms
log.retention.bytes
log.cleanup.policy
num.io.threads
num.replica.fetchers
num.network.threads
log.flush.interval.messages
log.flush.interval.ms

2. 服役新节点、退役旧节点
3. 增加主题分区
4. 增加分区副本因子
5. 手动调整分区副本存储因子
6. Leader分区负载平衡
7. 自动创建主题