a whole, and either all or none is executed. • Consistency: transactions should ensure that the state of data remains consistent after the tran‐ sition. • Isolation: when multiple transactions execute availability, soft state, and eventual consistency. • Basically Available: ensure that distributed transaction parties are not necessarily online at the same time. • Soft state: system status updates same time, when the secondary database breaks down, ShardingSphere can also dynamically correct the state of storage nodes to ensure correct distribution of the read traffic. 3.4.5 Related References Java

a whole, and either all or none is executed. • Consistency: transactions should ensure that the state of data remains consistent after the tran‐ sition. • Isolation: when multiple transactions execute availability, soft state, and eventual consistency. • Basically Available: ensure that distributed transaction parties are not necessarily online at the same time. • Soft state: system status updates operation in case of single node in failure. Centralized management is to uniformly manage the state of database storage nodes and middleware computing nodes, and can detect the latest updates in the

a whole, and either all or none is executed. • Consistency: transactions should ensure that the state of data remains consistent after the tran‐ sition. • Isolation: when multiple transactions execute availability, soft state, and eventual consistency. • Basically Available: ensure that distributed transaction parties are not necessarily online at the same time. • Soft state: system status updates operation in case of single node in failure. Centralized management is to uniformly manage the state of database storage nodes and middleware computing nodes, and can detect the latest updates in the

Console page display normally? . . . . . . . . . . . . . . . . . . . . . . 92 10.8 Why is the job state shard to be adjusted in the Console? . . . . . . . . . . . . . . . . . 92 10.9 Why is there a task NO The primary key of the job running instance that executes the shard run ning YES The running state of the shard item.Only valid when monitorExecution is configured fail over YES If the shard item sharding item, multiple sharding items are separated by commas. st ate V AR CH AR (2 0) Y e s State of job execution, the value options are TASK_STAGING, TASK_RUNNING, TASK_FINISHED, TASK_KILLED, TASK_LOST

a whole, and either all or none is executed. • Consistency: transactions should ensure that the state of data remains consistent after the tran‐ sition. • Isolation: when multiple transactions execute availability, soft state, and eventual consistency. • Basically Available: ensure that distributed transaction parties are not necessarily online at the same time. • Soft state: system status updates same time, when the secondary database breaks down, ShardingSphere can also dynamically correct the state of storage nodes to ensure correct distribution of the read traffic. 3.4.5 Related References Java

situations. They usually replace strongly consistent transactions with eventually consistent soft state. 3.1.3 Goal The main design goal of the data sharding modular of Apache ShardingSphere is to try use sharding keys to route to the only data node, which will make the system in a totally unlocked state, thereby improve the concurrency efficiency further. In addition to routing to a single shard, replica calculated through SUM and COUNT of SQL re‐write, which has been mentioned in SQL re‐write, so we will state no more here. Pagination Merger All the merger types above can be paginated. Pagination is the decorator

事务要素的事务则称为柔性事 务。BASE 是基本可用、柔性状态和最终一致性这三个要素的缩写。 • 基本可用（Basically Available）保证分布式事务参与方不一定同时在线； • 柔性状态（Soft state）则允许系统状态更新有一定的延时，这个延时对客户来说不一定能够察觉； • 最终一致性（Eventually consistent）通常是通过消息传递的方式保证系统的最终一致性。 在 ACID 按类型（INSERT、UPDATE、DELETE、SELECT）分类的路由总数 routed_result_total C OUN TER 路由结果总数 (数据源路由结果、表路由结果) jdbc_state GA UGE ShardingSphere‐JDBC 状态信息。0 表示正常状态；1 表示熔断状 态；2 锁定状态 jdbc_meta_data_info GA UGE ShardingSphere‐JDBC ERT、UPDATE、DELETE、SELECT）分类的路由总数 rout ed_result_total C OUN TER 路由结果总数 (数据源路由结果、表路由结果) proxy_state GA UGE ShardingSphere‐Proxy 状态信息。0 表示正常状态；1 表示熔断状态； 2 锁定状态 proxy _meta_data_info GA UGE ShardingSphere‐Proxy

事务要素的事务则称为柔性事 务。BASE 是基本可用、柔性状态和最终一致性这三个要素的缩写。 • 基本可用（Basically Available）保证分布式事务参与方不一定同时在线； • 柔性状态（Soft state）则允许系统状态更新有一定的延时，这个延时对客户来说不一定能够察觉； • 最终一致性（Eventually consistent）通常是通过消息传递的方式保证系统的最终一致性。 在 ACID 按类型（INSERT、UPDATE、DELETE、SELECT）分类的路由总数 routed_result_total C OUN TER 路由结果总数 (数据源路由结果、表路由结果) jdbc_state GA UGE ShardingSphere‐JDBC 状态信息。0 表示正常状态；1 表示熔断状 态；2 锁定状态 jdbc_meta_data_info GA UGE ShardingSphere‐JDBC ERT、UPDATE、DELETE、SELECT）分类的路由总数 rout ed_result_total C OUN TER 路由结果总数 (数据源路由结果、表路由结果) proxy_state GA UGE ShardingSphere‐Proxy 状态信息。0 表示正常状态；1 表示熔断状态； 2 锁定状态 proxy _meta_data_info GA UGE ShardingSphere‐Proxy

SELECT * FROM BLOG WHERE state = ‘ACTIVE’ AND title like #{title} 最近更新: 24 入另一个条件即 可。 SELECT * FROM BLOG WHERE state = ‘ACTIVE’ AND title like #{title} SELECT * FROM BLOG WHERE state = ‘ACTIVE’ AND title like #{title}

0 码力 | 98 页 | 2.03 MB | 1 年前

3

Apache ShardingSphere v5.5.0 中文文档

事务要素的事务则称为柔性事 务。BASE 是基本可用、柔性状态和最终一致性这三个要素的缩写。 • 基本可用（Basically Available）保证分布式事务参与方不一定同时在线； • 柔性状态（Soft state）则允许系统状态更新有一定的延时，这个延时对客户来说不一定能够察觉； • 最终一致性（Eventually consistent）通常是通过消息传递的方式保证系统的最终一致性。 在 ACID ERT、UPDATE、DELETE、SELECT）分类的路由总 数 ro uted_result_total C OU NT ER 路由结果总数 (数据源路由结果、表路由结果) jdbc_state G AU GE ShardingSphere‐JDBC 状态信息。0 表示正常状态；1 表示熔断状 态；2 锁定状态 jd bc_meta_data_info G AU GE ShardingSphere‐JDBC ERT、UPDATE、DELETE、SELECT）分类的路由总数 rout ed_result_total C OUN TER 路由结果总数 (数据源路由结果、表路由结果) proxy_state GA UGE ShardingSphere‐Proxy 状态信息。0 表示正常状态；1 表示熔断状态； 2 锁定状态 proxy _meta_data_info GA UGE ShardingSphere‐Proxy

0 码力 | 557 页 | 4.61 MB | 1 年前

3

共 19 条

• 1
• 2

前往