. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.3.2 Execution mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Notification execution . . and executed on another job node. 5.3.1 Concept Failover is a temporary compensation execution mechanism for the currently executed job. When the next job is run, the current job allocation will be adjusted With sufficient resources, the job can still be executed completely at 13:30. 5.3.2 Execution mechanism When the job execution node goes down, the failover process will be triggered. ElasticJob determines

requires to designate sharding result externally, which is referred to as Hint in ShardingSphere. Mechanism Apache ShardingSphere uses ThreadLocal to manage sharding key values. Users can program to add use the cluster topology state diagram to manage the cluster state and the heartbeat detection mechanism to achieve state detection and update. On the other hand, the unified coordination and the synchronization Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

requires to designate sharding result externally, which is referred to as Hint in ShardingSphere. Mechanism Apache ShardingSphere uses ThreadLocal to manage sharding key values. Users can program to add use the cluster topology state diagram to manage the cluster state and the heartbeat detection mechanism to achieve state detection and update. On the other hand, the unified coordination and the synchronization Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

apache.shardingsphere:shardingsphere-infra-context, the kernel operation and metadata refresh mechanism of Context • org.apache.shardingsphere:shardingsphere-logging-core, logging core • org.apache Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it separation and other rules ‐> Create table. Due to the existence of the single‐table automatic loading mechanism, the database will be accessed multiple times for loading during the operation, and when multiple

requires to designate sharding result externally, which is referred to as Hint in ShardingSphere. Mechanism Apache ShardingSphere uses ThreadLocal to manage sharding key values. Users can program to add Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

apache.shardingsphere:shardingsphere-infra-context, the kernel operation and metadata refresh mechanism of Context • org.apache.shardingsphere:shardingsphere-standalone-mode-core, the persis‐ tence Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

requires to designate sharding result externally, which is referred to as Hint in ShardingSphere. Mechanism Apache ShardingSphere uses ThreadLocal to manage sharding key values. Users can program to add Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

apache.shardingsphere:shardingsphere-infra-context, the kernel operation and metadata refresh mechanism of Context • org.apache.shardingsphere:shardingsphere-logging-core, logging core • org.apache Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it

Answer: 1. shardingsphere-transaction-xa-core include atomikos, it will trigger auto‐configuration mechanism in spring‐boot, add @SpringBootApplication(exclude = JtaAutoConfigu- ration.class) will solve it