sharding item sequence number stores detailed information. The child node under each shard is used to control and record the running status of the shard. Node details description： 5.2. Elastic Schedule 11 core of the job more purely, the server function may be deleted in the future, and the ability to control whether the server is disabled should be delegated to the automated deployment system. leader node ShardingSphere ElasticJob document 6.1.4 Operation API ElasticJob provides a Java API, which can control the life cycle of jobs in a distributed environment by directly operating the registry. The module

be saved persistently. In single data node, transactions are only restricted to the access and control of single database re‐ sources, called local transactions. Almost all the mature relational databases application scenario. However, in distributed scenarios, traditional database solutions cannot manage and control global transactions, and users may find data inconsistency on multiple database nodes. ShardingSphere database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 3.6.2 Challenges

operations, including the SET database manage‐ ment order used to set the database and transaction control statement as TCL. In this case, all physical databases matched with the name are traversed according is to automat‐ ically balance between the resource control and the execution efficiency. Connection Mode From the perspective of resource control, the connection number of the business side’s visit can be used, under this kind of circumstances, it will also degenerate to the memory merger. The control and protection of database connection resources is one thing, adopting better merging model to save

be saved persistently. In single data node, transactions are only restricted to the access and control of single database re‐ sources, called local transactions. Almost all the mature relational databases application scenario. However, in distributed scenarios, traditional database solutions cannot manage and control global transactions, and users may find data inconsistency on multiple database nodes. ShardingSphere database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 3.6.2 Challenges

be saved persistently. In single data node, transactions are only restricted to the access and control of single database re‐ sources, called local transactions. Almost all the mature relational databases application scenario. However, in distributed scenarios, traditional database solutions cannot manage and control global transactions, and users may find data inconsistency on multiple database nodes. ShardingSphere database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 8.5.2 Challenges

be saved persistently. In single data node, transactions are only restricted to the access and control of single database re‐ sources, called local transactions. Almost all the mature relational databases application scenario. However, in distributed scenarios, traditional database solutions cannot manage and control global transactions, and users may find data inconsistency on multiple database nodes. ShardingSphere database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 8.5.2 Challenges

power outage or crash). In single data node, transactions are only restricted to the access and control of single database re‐ sources, called local transactions. Almost all the mature relational databases underlying database node, middleware or business system node, to further provide the basis for the control and scheduling of the cluster. In this regard, we use the cluster topology state diagram to manage to achieve configuration synchronization, notification of state changes and distributed locks to control exclusive operations. At the same time, since the governance function itself can use appropriate

database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 4.2.2 Challenges information with control and scheduling. In the overload traffic scenario, circuit breaker and request limiting for a node to ensure whole database cluster can run continuously is a challenge to control ability module is to realize the integrated management ability from database to computing node, and provide control ability for components in case of fail‐ ure. 4.2. Management 23 Apache ShardingSphere document

database has become a trend gradually. The unified management ability of cluster perspective, and control ability of individual components are necessary ability in modern database system. 4.2.2 Challenges information with control and scheduling. In the overload traffic scenario, circuit breaker and request limiting for a node to ensure whole database cluster can run continuously is a challenge to control ability module is to realize the integrated management ability from database to computing node, and provide control ability for components in case of fail‐ ure. 4.2.4 Core Concept Circuit Breaker Fuse connection

Language）负责资源和规则的创建、修改和删除； • RQL（Resource & Rule Query Language）负责资源和规则的查询和展现； • SCTL（ShardingSphere Control Language）负责 Hint、事务类型切换、分片执行计划查询等增量 功能的操作。 3.8.3 目标 打破中间件和数据库之间的界限，让开发者像使用数据库一样使用 Apache ShardingSphere，是 discoverProps 数据库发现服务参数 SCTL 语法 本章节将对 SCTL 的语法进行详细说明，并结合使用实战介绍 SCTL 的使用方法。 SCTL 定义 SCTL (ShardingSphere Control Language) 为 Apache ShardingSphere 的控制语言，负责 Hint、事务类 型切换、分片执行计划查询等增量功能的操作。 3.8. Dist SQL 100 Apache 如果是 Windows 10，还需要通过注册表或组策略，解除操作系统的文件名长度限制（需要重 启） ：> 在注册表编辑器中创建 HKLM\SYSTEM\CurrentControlSet\Control\FileSystem LongPathsEnabled，类型为 REG_DWORD，并设置为 1。> 或者从系统菜单点击设置图标，输入“编辑 组策略”，然后在打开的窗口依次进入“计算机管理”>