The control and protection of database connection resources is one thing, adopting better merging model to save the memory resources of middleware is another thing. How to deal with the relationship between set grouping and unit creation. Result set grouping is the key to realize the internal connection model concept. According to the config‐ uration option of maxConnectionSizePerQuery, execution engine will 0-beta 2PC Transaction The earliest distributed transaction model of XA standard is X/Open Distributed Transaction Processing (DTP) model brought up by X/Open, XA for short. Distributed transaction

is positioned as a Database Plus, and aims at building a new criterion and ecosystem above multi‐model databases. It focuses on how to reuse existing databases and their re‐ spective upper layer, rather Distributed Database* Data Security Database Gateway Stress T esting Data Sharding Data Encrypt Multi‐model Databases Sup‐ ported Shadow D atabase Readwrit e‐ splitting Row Authority (TODO) SQL Dialect consistency. 2PC Transaction The earliest distributed transaction model of XA standard is X/Open Distributed Transaction Processing (DTP) model brought up by X/Open, XA for short. Distributed transaction

Old Java Objects POJO class corresponding to the table. This class describes the objects that will "model" database table rows. The POJO class would have implementation for all the methods required to perform environment is driven by relational data model. You have to work on existing and complex schemas. Use Hibernate, if the environment is driven by object model and needs to generate SQL automatically.

consistency. 2PC Transaction The earliest distributed transaction model of XA standard is X/Open Distributed Transaction Processing (DTP) model brought up by X/Open, XA for short. Distributed transaction transactions, including: • XA transaction • BASE transaction XA 2PC transaction submit uses the DTP Model defined by X/OPEN, in which created AP (Application Pro‐ gram), TM (Transaction Manager) and RM (Resource 4.4. Distributed Transaction 47 Apache ShardingSphere document, v5.1.2 Java implements the XA model through defining a JTA interface, in which ResourceManager requires an XA driver provided by database

consistency. 2PC Transaction The earliest distributed transaction model of XA standard is X/Open Distributed Transaction Processing (DTP) model brought up by X/Open, XA for short. Distributed transaction transactions, including: • XA transaction • BASE transaction XA 2PC transaction submit uses the DTP Model defined by X/OPEN, in which created AP (Application Pro‐ gram), TM (Transaction Manager) and RM (Resource all of them together, which has guaran‐ teed the distributed consistency. Java implements the XA model through defining a JTA interface, in which ResourceManager requires an XA driver provided by database

Concept XA Protocol The original distributed transaction model of XA protocol is the“X/Open Distributed Transaction Pro‐ cessing (DTP)”model, XA protocol for short, which was proposed by the X/Open international Transactional consistency between primary and secondary databases is not supported. In the primary‐secondary model, both data reads and writes in transactions use the primary database. 3.3. Readwrite-splitting 37 Whether Hint is allowed in ShardingSphere‐ Proxy. Using Hint changes the Proxy’s threading model from IO mul‐ tiplexing to a separate thread per request, re‐ ducing Proxy’s throughput. f a

Concept XA Protocol The original distributed transaction model of XA protocol is the“X/Open Distributed Transaction Pro‐ cessing (DTP)”model, XA protocol for short, which was proposed by the X/Open international Transactional consistency between primary and secondary databases is not supported. In the primary‐secondary model, both data reads and writes in transactions use the primary database. 3.3. Readwrite-splitting 36 Whether Hint is allowed in ShardingSphere‐ Proxy. Using Hint changes the Proxy’s threading model from IO mul‐ tiplexing to a separate thread per request, re‐ ducing Proxy’s throughput. f a

Concept XA Protocol The original distributed transaction model of XA protocol is the“X/Open Distributed Transaction Pro‐ cessing (DTP)”model, XA protocol for short, which was proposed by the X/Open international Transactional consistency between primary and secondary databases is not supported. In the primary‐secondary model, both data reads and writes in transactions use the primary database. 8.3. Readwrite-splitting 41 is required. Finally, the domain model is traversed through the abstract syntax tree by visitor; the context required for sharding is extracted through the domain model (SQLStatement); and then, mark locations

GET http://localhost:8888/scaling/job/list 响应应为： {"success":true,"errorCode":0,"errorMsg":null,"model":[]} 4.4. ShardingSphere-Scaling 261 Apache ShardingSphere document, v5.0.0-beta 结束 ShardingSphere-Scaling ShardingSphere document, v5.0.0-beta } }' 返回信息： { "success": true, "errorCode": 0, "errorMsg": null, "model": null } 查询迁移任务进度 接口描述：GET /scaling/job/progress/{jobId} 示例： curl -X GET \ http://localhost http://localhost:8888/scaling/job/progress/1 返回信息： { "success": true, "errorCode": 0, "errorMsg": null, "model": { "id": 1, "jobName": "Local Sharding Scaling Job", "status": "RUNNING/STOPPED" "syncTaskProgress":