(leader) Upgrading - PD For each PD replica - If it’s the leader of PD cluster, transfer the leadership - Upgrade PD V0 PD V0 (leader) PD V0 PD V1 PD V0 (leader) PD V0 PD V0 PD V0 PD V1 (leader) PD PingCAP.com Upgrading - PD For each PD replica - If it’s the leader of PD cluster, transfer the leadership - Upgrade PingCAP.com Upgrading - TiKV For each TiKV replica - Evict region leaders - Wait

document 10.11 Unable to startup Cloud Scheduler. Continuously output“Elastic job: IP:PORT has leadership” Answer: Cloud Scheduler required Mesos native library. Specify Mesos native library path by thrown: 10.11. Unable to startup Cloud Scheduler. Continuously output “Elastic job: IP:PORT has leadership” 93 Apache ShardingSphere ElasticJob document xxxx-07-27 22:33:55.224 [DEBUG] [localhost-sta

Store 4 PD PD PD PD: “Hey, Node1, create a new replica of Region 2 in Node 4, and transfer your leadership of Region 2 to Node 2” How scale-out works inside TiDB TiKV Node 3 Store 3 TiKV Node 1 Store

Bootstrap，如何解决？ . . . . . . . . . 91 10.11 运行 Cloud Scheduler 持续输出日志“Elastic job: IP:PORT has leadership”，不能正常运行 91 10.12 在多网卡的情况下无法获取到合适的 IP . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

impact on the cluster operation. Before disabling a leader, you need to switch the leadership. During the leadership change, performance jitter of about 3 seconds will occur. 10.2.4.2.2 Minority of replicas (BR) • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • Enhance support for connection reuse of log backup and PITR @YuJuncen • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • TiCDC • Fix the issue that restarting the changefeed might

impact on the cluster operation. Before disabling a leader, you need to switch the leadership. During the leadership change, performance jitter of about 3 seconds will occur. 10.2.4.2.2 Minority of replicas (BR) • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • Enhance support for connection reuse of log backup and PITR @YuJuncen • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • TiCDC • Fix the issue that restarting the changefeed might

API, but it’s only for refreshing against state changes in the global topo. Exception 1: Cluster Leadership In the case of flows that designate who the primary is, the topo is the authority. For such requests try to update its record, and only then succeed. This is required because of how the new cluster leadership redesign works. Exception 2: VTTablet startup When a vttablet starts up, it will treat the following

impact on the cluster operation. Before disabling a leader, you need to switch the leadership. During the leadership change, performance jitter of about 3 seconds will occur. 10.2.4.2.2 Minority of replicas @YuJuncen • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • TiCDC • Fix the issue that restarting the changefeed might @RidRisR • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • Improve the speed of merging SST files during data restore

impact on the cluster operation. Before disabling a leader, you need to switch the leadership. During the leadership change, performance jitter of about 3 seconds will occur. 10.2.4.2.2 Minority of replicas (BR) • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • Enhance support for connection reuse of log backup and PITR @YuJuncen • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • TiCDC • Fix the issue that restarting the changefeed might

impact on the cluster operation. Before disabling a leader, you need to switch the leadership. During the leadership change, performance jitter of about 3 seconds will occur. 10.2.4.2.2 Minority of replicas (BR) • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • Enhance support for connection reuse of log backup and PITR @YuJuncen • Alleviate the issue that the latency of the PITR log backup progress increases when Region leadership migration occurs #13638 @YuJuncen • TiCDC • Fix the issue that restarting the changefeed might