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使用手册

MySQL 使用手册

环境要求

支持的 MySQL 版本：5.1.15 ~ 5.7.x。

权限要求

开启 binlog

MySQL 5.7 my.cnf 示例配置：

[mysqld]
server-id=1
log-bin=mysql-bin
binlog-format=row
binlog-row-image=full
max_connections=600

执行以下命令，确认是否有开启 binlog：

show variables like '%log_bin%';
show variables like '%binlog%';

如以下显示，则说明 binlog 已开启

+-----------------------------------------+---------------------------------------+
| Variable_name                           | Value                                 |
+-----------------------------------------+---------------------------------------+
| log_bin                                 | ON                                    |
| binlog_format                           | ROW                                   |
| binlog_row_image                        | FULL                                  |
+-----------------------------------------+---------------------------------------+

赋予 MySQL 账号 Replication 相关权限。

执行以下命令，查看该用户是否有迁移权限：

SHOW GRANTS FOR 'user';

示例结果：

+------------------------------------------------------------------------------+
|Grants for ${username}@${host}                                                |
+------------------------------------------------------------------------------+
|GRANT REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO ${username}@${host}     |
|.......                                                                       |
+------------------------------------------------------------------------------+

完整流程示例

前提条件

在 MySQL 已准备好源端库、表、数据。

示例：

DROP DATABASE IF EXISTS migration_ds_0;
CREATE DATABASE migration_ds_0 DEFAULT CHARSET utf8;

USE migration_ds_0

CREATE TABLE t_order (order_id INT NOT NULL, user_id INT NOT NULL, status VARCHAR(45) NULL, PRIMARY KEY (order_id));

INSERT INTO t_order (order_id, user_id, status) VALUES (1,2,'ok'),(2,4,'ok'),(3,6,'ok'),(4,1,'ok'),(5,3,'ok'),(6,5,'ok');

在 MySQL 准备目标端库。

示例：

DROP DATABASE IF EXISTS migration_ds_10;
CREATE DATABASE migration_ds_10 DEFAULT CHARSET utf8;

DROP DATABASE IF EXISTS migration_ds_11;
CREATE DATABASE migration_ds_11 DEFAULT CHARSET utf8;

DROP DATABASE IF EXISTS migration_ds_12;
CREATE DATABASE migration_ds_12 DEFAULT CHARSET utf8;

操作步骤

在 proxy 新建逻辑数据库并配置好资源和规则。

CREATE DATABASE sharding_db;

USE sharding_db

ADD RESOURCE ds_2 (
    URL="jdbc:mysql://127.0.0.1:3306/migration_ds_10?serverTimezone=UTC&useSSL=false",
    USER="root",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_3 (
    URL="jdbc:mysql://127.0.0.1:3306/migration_ds_11?serverTimezone=UTC&useSSL=false",
    USER="root",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_4 (
    URL="jdbc:mysql://127.0.0.1:3306/migration_ds_12?serverTimezone=UTC&useSSL=false",
    USER="root",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

CREATE SHARDING TABLE RULE t_order(
RESOURCES(ds_2,ds_3,ds_4),
SHARDING_COLUMN=order_id,
TYPE(NAME="hash_mod",PROPERTIES("sharding-count"="6")),
KEY_GENERATE_STRATEGY(COLUMN=order_id,TYPE(NAME="snowflake"))
);

如果是迁移到异构数据库，那目前需要在 proxy 执行建表语句。

在 proxy 配置源端资源。

ADD MIGRATION SOURCE RESOURCE ds_0 (
    URL="jdbc:mysql://127.0.0.1:3306/migration_ds_0?serverTimezone=UTC&useSSL=false",
    USER="root",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

启动数据迁移。

MIGRATE TABLE ds_0.t_order INTO t_order;

或者指定目标端逻辑库：

MIGRATE TABLE ds_0.t_order INTO sharding_db.t_order;

查看数据迁移作业列表。

SHOW MIGRATION LIST;

示例结果：

+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| id                                  | tables  | sharding_total_count | active | create_time         | stop_time |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| j015d4ee1b8a5e7f95df19babb2794395e8 | t_order | 1                    | true   | 2022-08-22 16:37:01 | NULL      |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+

查看数据迁移详情。

SHOW MIGRATION STATUS 'j015d4ee1b8a5e7f95df19babb2794395e8';
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| item | data_source | status                   | active | inventory_finished_percentage | incremental_idle_seconds |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| 0    | ds_0        | EXECUTE_INCREMENTAL_TASK | true   | 100                           | 141                      |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+

执行数据一致性校验。

CHECK MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8' BY TYPE (NAME='CRC32_MATCH');
+------------+----------------------+----------------------+-----------------------+-------------------------+
| table_name | source_records_count | target_records_count | records_count_matched | records_content_matched |
+------------+----------------------+----------------------+-----------------------+-------------------------+
| t_order    | 6                    | 6                    | true                  | true                    |
+------------+----------------------+----------------------+-----------------------+-------------------------+

数据一致性校验算法类型来自：

SHOW MIGRATION CHECK ALGORITHMS;
+-------------+--------------------------------------------------------------+----------------------------+
| type        | supported_database_types                                     | description                |
+-------------+--------------------------------------------------------------+----------------------------+
| CRC32_MATCH | MySQL                                                        | Match CRC32 of records.    |
| DATA_MATCH  | SQL92,MySQL,MariaDB,PostgreSQL,openGauss,Oracle,SQLServer,H2 | Match raw data of records. |
+-------------+--------------------------------------------------------------+----------------------------+

目标端开启数据加密的情况需要使用DATA_MATCH。

异构迁移需要使用DATA_MATCH。

完成作业。

COMMIT MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8';

刷新元数据。

REFRESH TABLE METADATA;

更多 DistSQL 请参见 RAL #数据迁移。

PostgreSQL 使用手册

环境要求

支持的 PostgreSQL 版本：9.4 或以上版本。

权限要求

开启 test_decoding。
调整 WAL 配置。

postgresql.conf 示例配置：

wal_level = logical
max_wal_senders = 10
max_replication_slots = 10
max_connections = 600

详情请参见 Write Ahead Log 和 Replication。

配置 PostgreSQL 允许 Proxy 拥有 replication 权限。

pg_hba.conf 示例配置：

host replication repl_acct 0.0.0.0/0 md5

详情请参见 The pg_hba.conf File。

完整流程示例

前提条件

在 PostgreSQL 已准备好源端库、表、数据。

DROP DATABASE IF EXISTS migration_ds_0;
CREATE DATABASE migration_ds_0;

\c migration_ds_0

CREATE TABLE t_order (order_id INT NOT NULL, user_id INT NOT NULL, status VARCHAR(45) NULL, PRIMARY KEY (order_id));

INSERT INTO t_order (order_id, user_id, status) VALUES (1,2,'ok'),(2,4,'ok'),(3,6,'ok'),(4,1,'ok'),(5,3,'ok'),(6,5,'ok');

在 PostgreSQL 准备目标端库。

DROP DATABASE IF EXISTS migration_ds_10;
CREATE DATABASE migration_ds_10;

DROP DATABASE IF EXISTS migration_ds_11;
CREATE DATABASE migration_ds_11;

DROP DATABASE IF EXISTS migration_ds_12;
CREATE DATABASE migration_ds_12;

操作步骤

在 proxy 新建逻辑数据库并配置好资源和规则。

CREATE DATABASE sharding_db;

\c sharding_db

ADD RESOURCE ds_2 (
    URL="jdbc:postgresql://127.0.0.1:5432/migration_ds_10",
    USER="postgres",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_3 (
    URL="jdbc:postgresql://127.0.0.1:5432/migration_ds_11",
    USER="postgres",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_4 (
    URL="jdbc:postgresql://127.0.0.1:5432/migration_ds_12",
    USER="postgres",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

CREATE SHARDING TABLE RULE t_order(
RESOURCES(ds_2,ds_3,ds_4),
SHARDING_COLUMN=order_id,
TYPE(NAME="hash_mod",PROPERTIES("sharding-count"="6")),
KEY_GENERATE_STRATEGY(COLUMN=order_id,TYPE(NAME="snowflake"))
);

如果是迁移到异构数据库，那目前需要在 proxy 执行建表语句。

在 proxy 配置源端资源。

ADD MIGRATION SOURCE RESOURCE ds_0 (
    URL="jdbc:postgresql://127.0.0.1:5432/migration_ds_0",
    USER="postgres",
    PASSWORD="root",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

启动数据迁移。

MIGRATE TABLE ds_0.t_order INTO t_order;

或者指定目标端逻辑库：

MIGRATE TABLE ds_0.t_order INTO sharding_db.t_order;

也可以指定源端schema：

MIGRATE TABLE ds_0.public.t_order INTO sharding_db.t_order;

查看数据迁移作业列表。

SHOW MIGRATION LIST;

示例结果：

+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| id                                  | tables  | sharding_total_count | active | create_time         | stop_time |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| j015d4ee1b8a5e7f95df19babb2794395e8 | t_order | 1                    | true   | 2022-08-22 16:37:01 | NULL      |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+

查看数据迁移详情。

SHOW MIGRATION STATUS 'j015d4ee1b8a5e7f95df19babb2794395e8';
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| item | data_source | status                   | active | inventory_finished_percentage | incremental_idle_seconds |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| 0    | ds_0        | EXECUTE_INCREMENTAL_TASK | true   | 100                           | 141                      |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+

执行数据一致性校验。

CHECK MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8';
+------------+----------------------+----------------------+-----------------------+-------------------------+
| table_name | source_records_count | target_records_count | records_count_matched | records_content_matched |
+------------+----------------------+----------------------+-----------------------+-------------------------+
| t_order    | 6                    | 6                    | true                  | true                    |
+------------+----------------------+----------------------+-----------------------+-------------------------+

完成作业。

COMMIT MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8';

刷新元数据。

REFRESH TABLE METADATA;

更多 DistSQL 请参见 RAL #数据迁移。

openGauss 使用手册

环境要求

支持的 openGauss 版本：2.0.1 ~ 3.0.0。

权限要求

调整 WAL 配置。

postgresql.conf 示例配置：

wal_level = logical
max_wal_senders = 10
max_replication_slots = 10
wal_sender_timeout = 0
max_connections = 600

详情请参见 Write Ahead Log 和 Replication。

配置 openGauss 允许 Proxy 拥有 replication 权限。

pg_hba.conf 示例配置：

host replication repl_acct 0.0.0.0/0 md5

详情请参见 Configuring Client Access Authentication 和 Example: Logic Replication Code。

完整流程示例

前提条件

在 openGauss 已准备好源端库、表、数据。

DROP DATABASE IF EXISTS migration_ds_0;
CREATE DATABASE migration_ds_0;

\c migration_ds_0

CREATE TABLE t_order (order_id INT NOT NULL, user_id INT NOT NULL, status VARCHAR(45) NULL, PRIMARY KEY (order_id));

INSERT INTO t_order (order_id, user_id, status) VALUES (1,2,'ok'),(2,4,'ok'),(3,6,'ok'),(4,1,'ok'),(5,3,'ok'),(6,5,'ok');

在 openGauss 准备目标端库。

DROP DATABASE IF EXISTS migration_ds_10;
CREATE DATABASE migration_ds_10;

DROP DATABASE IF EXISTS migration_ds_11;
CREATE DATABASE migration_ds_11;

DROP DATABASE IF EXISTS migration_ds_12;
CREATE DATABASE migration_ds_12;

操作步骤

在 proxy 新建逻辑数据库并配置好资源和规则。

CREATE DATABASE sharding_db;

\c sharding_db

ADD RESOURCE ds_2 (
    URL="jdbc:opengauss://127.0.0.1:5432/migration_ds_10",
    USER="gaussdb",
    PASSWORD="Root@123",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_3 (
    URL="jdbc:opengauss://127.0.0.1:5432/migration_ds_11",
    USER="gaussdb",
    PASSWORD="Root@123",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
), ds_4 (
    URL="jdbc:opengauss://127.0.0.1:5432/migration_ds_12",
    USER="gaussdb",
    PASSWORD="Root@123",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

CREATE SHARDING TABLE RULE t_order(
RESOURCES(ds_2,ds_3,ds_4),
SHARDING_COLUMN=order_id,
TYPE(NAME="hash_mod",PROPERTIES("sharding-count"="6")),
KEY_GENERATE_STRATEGY(COLUMN=order_id,TYPE(NAME="snowflake"))
);

如果是迁移到异构数据库，那目前需要在 proxy 执行建表语句。

在 proxy 配置源端资源。

ADD MIGRATION SOURCE RESOURCE ds_2 (
    URL="jdbc:opengauss://127.0.0.1:5432/migration_ds_0",
    USER="gaussdb",
    PASSWORD="Root@123",
    PROPERTIES("minPoolSize"="1","maxPoolSize"="20","idleTimeout"="60000")
);

启动数据迁移。

MIGRATE TABLE ds_0.t_order INTO t_order;

或者指定目标端逻辑库：

MIGRATE TABLE ds_0.t_order INTO sharding_db.t_order;

也可以指定源端schema：

MIGRATE TABLE ds_0.public.t_order INTO sharding_db.t_order;

查看数据迁移作业列表。

SHOW MIGRATION LIST;

示例结果：

+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| id                                  | tables  | sharding_total_count | active | create_time         | stop_time |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+
| j015d4ee1b8a5e7f95df19babb2794395e8 | t_order | 1                    | true   | 2022-08-22 16:37:01 | NULL      |
+-------------------------------------+---------+----------------------+--------+---------------------+-----------+

查看数据迁移详情。

SHOW MIGRATION STATUS 'j015d4ee1b8a5e7f95df19babb2794395e8';
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| item | data_source | status                   | active | inventory_finished_percentage | incremental_idle_seconds |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+
| 0    | ds_0        | EXECUTE_INCREMENTAL_TASK | true   | 100                           | 141                      |
+------+-------------+--------------------------+--------+-------------------------------+--------------------------+

执行数据一致性校验。

CHECK MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8';
+------------+----------------------+----------------------+-----------------------+-------------------------+
| table_name | source_records_count | target_records_count | records_count_matched | records_content_matched |
+------------+----------------------+----------------------+-----------------------+-------------------------+
| t_order    | 6                    | 6                    | true                  | true                    |
+------------+----------------------+----------------------+-----------------------+-------------------------+

完成作业。

COMMIT MIGRATION 'j015d4ee1b8a5e7f95df19babb2794395e8';

刷新元数据。

REFRESH TABLE METADATA;

更多 DistSQL 请参见 RAL #数据迁移。