Data Migration 简单使用场景

    假设上游结构为：

    • 实例 1
    • 实例 2
    • 实例 3

    1. 不合并 库。

      1. 将实例 1 中的 user 库同步到下游 TiDB 的 user_north 库中。

      2. 将实例 2 中的 user 库同步到下游 TiDB 的 user_east 库中。

      3. 将实例 3 中的 user 库同步到下游 TiDB 的 user_south 库中。

    2. 将上游 store 库同步到下游 store 库中，且同步过程中不合并表。

      1. 实例 2 和实例 3 中都存在 store_sz 表，且这两个 store_sz 表分别被同步到下游的 store_suzhou 表和 store_shenzhen 表中。

      2. 任何情况下都不删除 store 库的任何数据。

    3. log 库需要被过滤掉。

    假设下游结构为：

    • 为了满足同步要求中第二点的第一条要求，需要配置以下 ：

      1.   routes:
      2.     ...
      3.     instance-2-store-rule:
      4.       schema-pattern: "store"
      5.       table-pattern: "store_sz"
      6.       target-schema: "store"
      7.       target-table:  "store_suzhou"
      8.     instance-3-store-rule:
      9.       schema-pattern: "store"
      10.       table-pattern: "store_sz"
      11.       target-schema: "store"
      12.       target-table:  "store_shenzhen"

    • 为了满足同步要求中第一点的第四条要求，需要配置以下 ：

    • 为了满足同步要求中第二点的第二条要求，需要配置以下 ：

      1.   filters:
      2.     ...
      3.     store-filter-rule:
      4.       schema-pattern: "store"
      5.       events: ["drop database", "truncate table", "drop table", "delete"]
      6.       action: Ignore

    以下是完整的同步任务配置，详见配置介绍。

    1. name: "one-tidb-slave"
    2. task-mode: all
    3. meta-schema: "dm_meta"
    5. target-database:
    6.   host: "192.168.0.1"
    7.   port: 4000
    8.   user: "root"
    9.   password: ""
    11. mysql-instances:
    12.   -
    13.     source-id: "instance-1"
    14.     route-rules: ["instance-1-user-rule"]
    15.     filter-rules: ["log-filter-rule", "user-filter-rule" , "store-filter-rule"]
    16.     black-white-list:  "log-ignored"
    17.     mydumper-config-name: "global"
    18.     loader-config-name: "global"
    19.     syncer-config-name: "global"
    20.   -
    21.     source-id: "instance-2"
    22.     route-rules: ["instance-2-user-rule", instance-2-store-rule]
    23.     filter-rules: ["log-filter-rule", "user-filter-rule" , "store-filter-rule"]
    24.     black-white-list:  "log-ignored"
    25.     mydumper-config-name: "global"
    26.     loader-config-name: "global"
    27.     syncer-config-name: "global"
    28.   -
    29.     source-id: "instance-3"
    30.     route-rules: ["instance-3-user-rule", instance-3-store-rule]
    31.     filter-rules: ["log-filter-rule", "user-filter-rule" , "store-filter-rule"]
    32.     black-white-list:  "log-ignored"
    33.     mydumper-config-name: "global"
    34.     loader-config-name: "global"
    35.     syncer-config-name: "global"
    37. # 所有实例的共有配置
    39. routes:
    40.   instance-1-user-rule:
    41.     schema-pattern: "user"
    42.     target-schema: "user_north"
    43.   instance-2-user-rule:
    44.     schema-pattern: "user"
    45.     target-schema: "user_east"
    46.   instance-3-user-rule:
    47.     schema-pattern: "user"
    48.     target-schema: "user_south"
    49.     schema-pattern: "store"
    50.     table-pattern: "store_sz"
    51.     target-schema: "store"
    52.     target-table:  "store_suzhou"
    53.   instance-3-store-rule:
    54.     schema-pattern: "store"
    55.     table-pattern: "store_sz"
    56.     target-schema: "store"
    57.     target-table:  "store_shenzhen"
    59. filters:
    60.   log-filter-rule:
    61.     schema-pattern: "user"
    62.     table-pattern: "log"
    63.     events: ["truncate table", "drop table", "delete"]
    64.     action: Ignore
    65.   user-filter-rule:
    66.     schema-pattern: "user"
    67.     events: ["drop database"]
    68.     action: Ignore
    69.   store-filter-rule:
    70.     schema-pattern: "store"
    71.     events: ["drop database", "truncate table", "drop table", "delete"]
    72.     action: Ignore
    74. black-white-list:
    75.   log-ignored:
    76.     ignore-dbs: ["log"]
    78. mydumpers:
    79.   global:
    80.     threads: 4
    81.     chunk-filesize: 64
    82.     skip-tz-utc: true
    84. loaders:
    85.   global:
    86.     pool-size: 16
    87.     dir: "./dumped_data"
    89. syncers:
    90.   global:
    91.     worker-count: 16
    92.     batch: 100