MariaDB 到 DocumentDB
| 功能 | 说明 |
|---|---|
Schema Migration | If the target database or dataset does not exist, BladePipe will automatically generate and execute CREATE statements based on the source metadata. |
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. |
Position Resetting | Reset positions by file position or timestamp. Allow re-consumption of incremental data logs in a past period or since a specific Binlog file and position. |
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. |
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 |
前置条件
| 条件 | 说明 |
|---|---|
账号权限 | |
开启 Binlog | [mysqld] |
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
任务参数
| 参数名称 | 说明 |
|---|---|
totalDataInMemMb | 攒批写入,内存中最大数据容量,超过此容量或超过 asyncFlushIntervalSec 则刷出数据到写入队列 |
asyncFlushIntervalSec | 攒批写入,等待刷出的间隔时间,超过此时间或超过 totalDataInMemMb 则刷出数据到写入队列 |
flushBatchMb | 单表最大攒批容量,超过此容量则刷出数据到写入队列 |
realFlushPauseSec | 刷出数据到 MongoDB 的等待时间,0 则不等待 |
enableTimeZoneProcess | 是否对时间字段进行时区转换 |
timezone | 需要转换的目标时区(默认 UTC) |
enableBatchApply | 启用批量写入模式 (默认关闭) |
Tips: 通用参数配置请参考 通用参数及功能