MySQL 到 Kudu

选择对端数据库：

Kudu

数据链路

基本功能

功能	说明
Schema Migration	If the target schema does not exist, BladePipe will automatically generate and execute CREATE statements based on the source metadata and the mapping rule.
Full Data Migration	Migrate data by sequentially scanning data in tables and writing it in batches to the target database.
Incremental Data Sync	Sync of common DML like INSERT, UPDATE, DELETE is supported.
Data Verification and Correction	Verify all existing data. Optionally, you can correct the inconsistent data based on verification results. Scheduled DataTasks are supported.
Subscription Modification	Add, delete, or modify the subscribed tables with support for historical data migration. For more information, see Modify Subscription.
Table Name Mapping	Support the mapping rules, namely, keeping the name the same as that in Source, converting the text to lowercase, converting the text to uppercase, truncating the name by "_digit" suffix.
Metadata Retrieval	Retrieve the target metadata with filtering conditions or target primary keys set from the source table.

高级功能

功能	说明
Custom Code	For more information, see Custom Code Processing, Debug Custom Code and Logging in Custom Code.
Adding Virtual Columns	Support adding custom virtual columns with fixed values, such as region, ID, etc.
Setting Target Primary Key	Change the primary key to another field to facilitate data aggregation and other operations.
Data Filtering Conditions	Support data filtering using WHERE conditions, with SQL-92 as the SQL language. For more information, see Data Filtering.

限制和注意点

限制项	说明
MySQL 存储引擎	支持 InnoDB, MySIAM, 阿里云 XEngine, 其他存储引擎暂未测试
MySQL 字符集	支持 utf8, utf8mb4, latin1, 其他编码暂未测试

链路FAQ

• MySQL 任务延迟怎么办?

• MySQL 源端找不到 binlog 文件

• 如何打开 MySQL 源端心跳?

• MySQL 源端 Schema 权限报错怎么办?

  Tips: MySQL 源端相关 FAQ 同样适用于 MySQL 系数据源。

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源端数据源

前置条件

条件	说明
账号权限	文档：MySQL / MariaDB 需要的权限
开启 Binlog	[mysqld] log-bin=mysql-bin # 开启 Binlog binlog-format=ROW # 选择 ROW 模式 binlog_row_image=FULL # 变更带所有列数据

任务参数

参数名称	说明
parseBinlogParallel	增量解析 Binlog 的并发数
parseBinlogBufferSize	用于增量解析 Binlog 的环形队列大小
maxTransactionSize	单事务最大数据条数，超过则分段刷出
limitThroughputMb	限制增量 Binlog 流量
extraDDL	兼容额外的 DDL 同步，包括 PT, GHOST, ALI_DMS, PT_GHOST
fullDataSqlConditionEnabled	将过滤条件拼入 SQL 中进行源端数据扫描，此参数只针对全量迁移有效
srcTimeZone	源端时区，例如 +08:00, Asia/Shanghai, America/New_York 等

Tips: 通用参数配置请参考 通用参数及功能

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目标端数据源

前置条件

条件	说明
网络准备	迁移同步节点（sidecar）可连接 Kudu 各 Master 和 Tablet Server 节点

任务参数

参数名称	说明
writeParallel	对端写入并发数
batchSize	单次写入的数据条数上限
retryCount	写入错误重试次数

Tips: 通用参数配置请参考 通用参数及功能