PostgreSQL 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.

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源端数据源

前置条件

条件	说明
账号权限	需要权限如下(以自建数据库为例): GRANT ALL PRIVILEGES ON DATABASE 同步库 TO 同步账号（或同步库 information_schema 中所有视图的 SELECT 权限和需要同步表、索引、约束的 SELECT 权限) ALTER USER 同步账号 REPLICATION
增量同步准备	准备动作按如下步骤进行: 修改 postgresql.conf, 设置 wal_level=logical 和 wal_log_hints = on 修改 pg_hba.conf, 设置 host replication 同步账号 CIDR网段 md5 , host 同步库 同步账号 CIDR网段 md5, host postgres 同步账号 CIDR网段 md5 重启 PostgreSQL
网络准备	迁移同步节点（sidecar）可连接 PostgreSQL 标准交互接口（如 5432）

任务参数

参数名称	说明
fullFetchSize	全量扫描数据设置的 fetch size
eventStoreSize	缓存解析完毕的增量事件缓存大小
ignoreGisSRID	解析 GIS 数据类型时是否忽略 SRID
defaultGisSRID	设置 GIS 数据类型的 SRID

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