vertical sharding according to business need. Vertical sharding requires to adjust the architecture and design from time to time. Generally speaking, it is not soon enough to deal with fast changing needs from 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 to reduce the influenceof sharding achievement are closely related, it extracts all kinds of scenarios by sharding strategies, instead of pro‐ viding built‐in sharding algorithms. Therefore, it can provide higher abstraction and the interface

Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Design Philosophy 4 2.1 Connect: Create database upper level standard . . . . . . . . . . . . . . . . Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462 11.5.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 462 Test case . platform and further building an ecosystem around the upper layer of the platform. Database Plus, the design phi‐ losophy of Apache ShardingSphere, aims at building the standard and ecosystem on the upper

Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Design Philosophy 4 2.1 Connect: Create database upper level standard . . . . . . . . . . . . . . . . Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491 11.5.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491 Test case . platform and further building an ecosystem around the upper layer of the platform. Database Plus, the design phi‐ losophy of Apache ShardingSphere, aims at building the standard and ecosystem on the upper

1.5 How to Contribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Design Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2.1 Connect: Integration Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 6.5.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 Test case . 467 xiv 1 Overview This chapter mainly introduces what Apache ShardingSphere is, as well as its design philosophy and deployment architecture. For frequently asked questions, please refer to FAQ. 1

1.3 Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Design Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.1 Connect: Integration Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 6.5.1 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 Test case . platform and further building an ecosystem around the upper layer of the platform. Database Plus, the design phi‐ losophy of Apache ShardingSphere, aims at building the standard and ecosystem on the upper

. . . . . . 306 7.7.12 12. [Sharding] Why are the default distributed auto‐augment key strategy pro‐ vided by ShardingSphere not continuous and most of them end with even num‐ bers? . . . . . . . planning and so on. 3.3. DistSQL 14 Apache ShardingSphere document, v5.0.0 3.3.3 Goal It is the design goal of DistSQL to break the boundary between middleware and database and let developers use Apache expansion or component replacement. 3.4.2 Challenges Pluggable architecture is very difficult to design for the project architecture. It needs to make each mod‐ ule decouple to independent and imperceptible

planning and so on. 3.3. DistSQL 14 Apache ShardingSphere document, v5.1.2 3.3.3 Goal It is the design goal of DistSQL to break the boundary between middleware and database and let developers use Apache expansion or component replacement. 3.4.2 Challenges Pluggable architecture is very difficult to design for the project architecture. It needs to make each mod‐ ule decouple to independent and imperceptible totally, and enables appendable functions in a way of superposition through a pluggable kernel. Design an architecture to completely isolate each function, not only can stimulate the enthusiasm of the

planning and so on. 3.3. DistSQL 14 Apache ShardingSphere document, v5.1.1 3.3.3 Goal It is the design goal of DistSQL to break the boundary between middleware and database and let developers use Apache expansion or component replacement. 3.4.2 Challenges Pluggable architecture is very difficult to design for the project architecture. It needs to make each mod‐ ule decouple to independent and imperceptible totally, and enables appendable functions in a way of superposition through a pluggable kernel. Design an architecture to completely isolate each function, not only can stimulate the enthusiasm of the

const、proba bilistic、ratel imiting、remote const JAEGE R_SAMPLER_PARAM Jaeger 采 样 率 参数 c onst：0、1，pro babilistic：0.0 ‐ 1.0，ratelimiting：> 0，自定义 每秒采集数量，remot e：需要自定义配置远程采样率管理 服务地址，JA EGER_SAMPLER_MA NAGER_HOST_PORT jta. datasou rce.pro perties .dialec t.SQLSe rverXAD ataSour ceDefin ition ｜ H2 非 XA 的 H2 数据源自动转化为 XA 的 H2 数据源 org .apache .shardi ngspher e.trans action. xa.jta. datasou rce.pro perties .dialec t

果分片总数变化，或作业服务器节点上下线或启用/禁用，以 及主节点选举，会触发设置重分片标记作业在下次执行时使 用 主节点重新分片，且中间不会被打断作业执行时不会触发分 片 sharding :raw‐lat ex:pro cessing 是 | 主节点在 分片时持有的节点如果有此节点，所有的作业执行都将阻塞， 直至分片结束主节点分片结束或主节点崩溃会删除此临时节 点 failove r:raw‐la tex:it