. . . . . . . . . . . . . . . . . 54 Functions covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Examples of valid queries . . . . . . . . . . . . . . . . . . . . . 54 Examples of queries not supported in the first implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Owned Primary Vindexes . . . . . .

. . . . . . . . . . . . . . . 54 VReplication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 File:Position based VReplication . . . . . . . . . . . . . . . . . 54 Problem Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . 54 Semi-Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Database Schema Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Schema Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . large number of MySQL instances Vitess database drivers Vitess includes compliant JDBC and Go (Golang) database drivers using a native query protocol. Additionally, it implements the MySQL server protocol

. . . . . . . . . . . . . . . . . . 54 Stream migration on a resharding operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Schema Tracker . . . . . . . . . . instead. Install Dependencies Install Go 1.15+ Download and install Golang 1.15. For example, at writing: curl -O https://golang.org/dl/go1.15.6.linux-amd64.tar.gz sudo tar -C /usr/local -xzf go1.15 with the local install guide instead. Install Dependencies Install Go 1.15+ Download and install Golang 1.15. For example, at writing: curl -O https://dl.google.com/go/go1.15.6.linux-amd64.tar.gz sudo

. . . . . . . . . . . . . . . 54 Scalability Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 3 Small instances . . . . . . . . . . . . . . . . . . . . . . . 54 Durability through replication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Consistency model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Multi-cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 VTTablet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . instead. Install Dependencies Install Go 1.15+ Download and install Golang 1.15. For example, at writing: curl -O https://golang.org/dl/go1.15.6.linux-amd64.tar.gz sudo tar -C /usr/local -xzf go1.15 with the local install guide instead. Install Dependencies Install Go 1.15+ Download and install Golang 1.15. For example, at writing: curl -O https://dl.google.com/go/go1.15.6.linux-amd64.tar.gz sudo

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Workflows involving the Topology Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . large number of MySQL instances Vitess database drivers Vitess includes compliant JDBC and Go (Golang) database drivers using a native query protocol. Additionally, it implements the MySQL server protocol the local install guide instead. 16 Install Dependencies Install Go 1.13+ Download and install Golang 1.13. For example, at writing: curl -O https://dl.google.com/go/go1.13.9.linux-amd64.tar.gz sudo

. . . . . . . . . . . . . . . . . 54 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Sharding scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Resharding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . with the local install guide instead. Install Dependencies Install Go 1.13+ Download and install Golang 1.13. For example, at writing: curl -O https://dl.google.com/go/go1.13.9.linux-amd64.tar.gz sudo

Vitess解析 ⺴⽹网易杭州研究院后台技术组---胡争 Vitess Introduction • Golang , GTID • youtube 2011~2015 , github 2000+ star • vitess provides servers and tools which facilitate scaling of MySQL databases for large large scale web services. • about 8w line(test code exclude) • client(bson SSL) java/python/go Golang ? • minimalist • goroutines • channels & selects • closures • defers • generics • GC • map

implement their own via the Authenticator interface: https://github.com/vitessio/vitess/blob/da1906d54eaca4447e039d90b96fb07251ae852c/g o/vt/vtadmin/rbac/authentication.go#L37. Vitess links to an example authentication plugin which is available here: https://gist.github.com/ajm188/5b2c7d3ca76004a297e6e279a54c2299. This example plugin extracts the actor from either the context of a request or from a cookie route handlers with a call to IsAuthorized, for example: https://github.com/vitessio/vitess/blob/da1906d54eaca4447e039d90b96fb07251ae852c/g o/vt/vtadmin/api.go#L755 func (api *API) GetClusters(ctx context