Distributed Listener Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 58 ii 6.2.4 Event Tracing Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Configuration . 60 Job Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Event Trace Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 6.2.7 Spring Namespace 64 Job Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Event Tracing Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Job Dump Configuration

${springboot.version} 配置 spring: datasource: url: jdbc:h2:mem:job_event_storage driver-class-name: org.h2.Driver username: sa password: elasticjob: tracing: type: RDB ShardingSphere ElasticJob document 作业启动 将配置 Spring 命名空间的 xml 通过 Spring 启动，作业将自动加载。 表结构说明 事 件 追 踪 的 event_trace_rdb_url 属 性 对 应 库 自 动 创 建 JOB_EXECUTION_LOG 和 JOB_STATUS_TRACE_LOG 两张表以及若干索引。 JOB_EXECUTION_LOG Simple – � Dataflow – � Script – � Http（3.0.0‐beta 提供） • � Event Trace – � Event Publisher – � Database Event Listener – ☐ Other Event Listener • ☐ Unified Schedule API • ☐ Unified Resource API

document, v5.2.1 3.10.2 Challenges Tracing and metrics need to collect system information through event tracking. Lots of events tracking make kernel code mess, difficult to maintain, and difficult to failed. 08000 18092 Get binlog position failed by job ˋ%sˋ, reason is: %s HY000 18093 Can not poll event because of binlog sync channel already closed. HY000 18094 Task ˋ%sˋ execute failed. HY000 18095 execution events. The execution engine only focuses on sending events rather than subscribers to the event. Other ShardingSphere modules, such as distributed transactions, call linked tracing and so on, will

ShardingSphere document 8.10.2 Challenges Tracing and metrics need to collect system information through event tracking. Lots of events tracking make kernel code mess, difficult to maintain, and difficult to failed. 0 8000 18092 Get binlog position failed by job ˋ%sˋ, reason is: %s H Y000 18093 Can not poll event because of binlog sync channel already closed. H Y000 18095 Can not find consistency check job of execution events. The execution engine only focuses on sending events rather than subscribers to the event. Other ShardingSphere modules, such as distributed transactions, call linked tracing and so on, will

execution events. Execution engine only focuses on message send‐ ing rather than subscribers of the event. Other ShardingSphere modules, such as distributed transac‐ 3.1. Sharding 44 Apache ShardingSphere synchronization of policies and rules between different nodes also require us to design a set of global event notification mechanisms and distributed coordination lock mechanisms for exclusive operations in

synchronization of policies and rules between different nodes also require us to design a set of global event notification mechanisms and distributed coordination lock mechanisms for exclusive operations in execution events. Execution engine only focuses on message send‐ ing rather than subscribers of the event. Other ShardingSphere modules, such as distributed transac‐ 7.1. Sharding 255 Apache ShardingSphere

Prometheus by default. 4.10.2 Challenges Tracing and metrics need to collect system information through event tracking. Lots of events tracking make kernel code mess, difficult to maintain, and difficult to execution events. Execution engine only focuses on message send‐ ing rather than subscribers of the event. Other ShardingSphere modules, such as distributed transac‐ 7.2. Sharding 265 Apache ShardingSphere

document, v5.2.0 3.10.2 Challenges Tracing and metrics need to collect system information through event tracking. Lots of events tracking make kernel code mess, difficult to maintain, and difficult to execution events. The execution engine only focuses on sending events rather than subscribers to the event. Other ShardingSphere modules, such as distributed transactions, call linked tracing and so on, will

document, v5.1.2 4.10.2 Challenges Tracing and metrics need to collect system information through event tracking. Lots of events tracking make kernel code mess, difficult to maintain, and difficult to execution events. Execution engine only focuses on message send‐ ing rather than subscribers of the event. Other ShardingSphere modules, such as distributed transac‐ 7.2. Sharding 276 Apache ShardingSphere

failed. 0 8000 18092 Get binlog position failed by job ‘%s‘, reason is: %s H Y000 18093 Can not poll event because of binlog sync channel already closed. H Y000 18095 Can not find consistency check job of sum: 23999546.19 Threads fairness: events (avg/stddev): 6985.9250/34.74 # 平均每线程 完成 6985.9250 次 event，标准差为 34.74 execution time (avg/stddev): 119.9977/0.01 # 每个线程平 均耗时 119.9977 秒，标准差为 0.01 压测过程中值得关注的点