How can you efficiently synchronize MySQL data to S3file with Apache SeaTunnel? All steps detailed here have been fully tested and are suitable for building a data‑platform scenario based on object storage. They offer flexible deployment and strong scalability, making this guide highly valuable for users with MySQL‑to‑S3 integration needs. Give it a like, save it, and start learning! Step 1: Create the Hive Table CREATE EXTERNAL TABLE ods_ekp.`ods_sys_notify_todo_bak` (
  `fd_id` STRING,
  `fd_app_name` STRING,
  `fd_model_name` STRING,
  `fd_model_id` STRING,
  `fd_key` STRING,
  `fd_parameter1` STRING,
  `fd_parameter2` STRING,
  `fd_create_time` TIMESTAMP,
  `fd_subject` STRING,
  `fd_type` INT,
  `fd_link` STRING,
  `fd_mobile_link` STRING,
  `fd_pad_link` STRING,
  `fd_bundle` STRING,
  `fd_replace_text` STRING,
  `fd_md5` STRING,
  `fd_del_flag` STRING,
  `fd_level` INT,
  `doc_creator_id` STRING,
  `fd_extend_content` STRING,
  `fd_lang` STRING,
  `fd_cate_name` STRING,
  `fd_cate_id` STRING,
  `fd_template_name` STRING,
  `fd_template_id` STRING,
  `fd_hierarchy_id` STRING
)
COMMENT 'sys_notify_todo_bak data'
PARTITIONED BY (
  `dctime` STRING COMMENT 'partition year‑month‑day'
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001'
STORED AS PARQUET
LOCATION 's3a://seatunnel/doris/warehouse/ods_ekp/ods_sys_notify_todo_bak'
TBLPROPERTIES (
  'parquet.compression'='ZSTD'
); CREATE EXTERNAL TABLE ods_ekp.`ods_sys_notify_todo_bak` (
  `fd_id` STRING,
  `fd_app_name` STRING,
  `fd_model_name` STRING,
  `fd_model_id` STRING,
  `fd_key` STRING,
  `fd_parameter1` STRING,
  `fd_parameter2` STRING,
  `fd_create_time` TIMESTAMP,
  `fd_subject` STRING,
  `fd_type` INT,
  `fd_link` STRING,
  `fd_mobile_link` STRING,
  `fd_pad_link` STRING,
  `fd_bundle` STRING,
  `fd_replace_text` STRING,
  `fd_md5` STRING,
  `fd_del_flag` STRING,
  `fd_level` INT,
  `doc_creator_id` STRING,
  `fd_extend_content` STRING,
  `fd_lang` STRING,
  `fd_cate_name` STRING,
  `fd_cate_id` STRING,
  `fd_template_name` STRING,
  `fd_template_id` STRING,
  `fd_hierarchy_id` STRING
)
COMMENT 'sys_notify_todo_bak data'
PARTITIONED BY (
  `dctime` STRING COMMENT 'partition year‑month‑day'
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001'
STORED AS PARQUET
LOCATION 's3a://seatunnel/doris/warehouse/ods_ekp/ods_sys_notify_todo_bak'
TBLPROPERTIES (
  'parquet.compression'='ZSTD'
); Notes: The delimiter setting ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001' must be configured identically later in SeaTunnel; otherwise the format will be wrong.
The compression algorithm 'parquet.compression'='ZSTD' also needs the same configuration later in SeaTunnel.
The file format STORED AS PARQUET likewise must match the later SeaTunnel configuration. The delimiter setting ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001' must be configured identically later in SeaTunnel; otherwise the format will be wrong. ROW FORMAT DELIMITED FIELDS TERMINATED BY '\001' The compression algorithm 'parquet.compression'='ZSTD' also needs the same configuration later in SeaTunnel. 'parquet.compression'='ZSTD' The file format STORED AS PARQUET likewise must match the later SeaTunnel configuration. STORED AS PARQUET Before use, remove the comments env {
  job.mode = "BATCH"
  parallelism = 2
}

source {
    Jdbc {
        url = "jdbc:mysql://[server‑ip]:3306/[database]?serverTimezone=GMT%2b8&useUnicode=true&characterEncoding=UTF-8&rewriteBatchedStatements=true"
        driver = "com.mysql.cj.jdbc.Driver"
        user = "[username]"
        password = "[password]",
        # dctime must be converted to string, because in the Hive table this field is a string; include the partition field in the query—SeaTunnel will handle it automatically in the sink
        query = "select fd_id, fd_app_name, fd_model_name, fd_model_id, fd_key, fd_parameter1, fd_parameter2, fd_create_time, fd_subject, fd_type, fd_link, fd_mobile_link, fd_pad_link, fd_bundle, fd_replace_text, fd_md5, fd_del_flag, fd_level, doc_creator_id, fd_extend_content, fd_lang, fd_cate_name, fd_cate_id, fd_template_name, fd_template_id, fd_hierarchy_id, cast(date_format(fd_create_time, '%Y-%m-%d') as char) as dctime from sys_notify_todo_bak"
    }
}

transform {
}

sink {
    S3File {
      bucket = "s3a://seatunnel"
      fs.s3a.endpoint = "[minio‑host/ip]:9000"
      access_key = "[username]"
      secret_key = "[password]"
      fs.s3a.aws.credentials.provider = "org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider"
      # directory path
      path = "/doris/warehouse/ods_ekp/ods_sys_notify_todo_bak"
      tmp_path = "/data/tmp/seatunnel"
      # Mandatory; because my MinIO is not SSL‑enabled, set as follows
      hadoop_s3_properties {
        "fs.s3a.connection.ssl.enabled" = "false"
        "fs.s3a.path.style.access" = "true"
      }
      # Parquet file format
      file_format_type = "parquet"
      # Must use \\ to represent \
      field_delimiter = "\\001"
      # Required for Parquet or it will fail
      parquet_avro_write_timestamp_as_int96 = true
      # Compression algorithm
      compress_codec = "zstd"
      have_partition = true
      partition_by = ["dctime"]
      partition_dir_expression = "${k0}=${v0}"
      is_partition_field_write_in_file = false
      schema_save_mode = "CREATE_SCHEMA_WHEN_NOT_EXIST"
      data_save_mode = "APPEND_DATA"
      custom_filename = true
      file_name_expression = "${transactionId}_${now}"
      filename_time_format = "yyyy.MM.dd"
  }
} env {
  job.mode = "BATCH"
  parallelism = 2
}

source {
    Jdbc {
        url = "jdbc:mysql://[server‑ip]:3306/[database]?serverTimezone=GMT%2b8&useUnicode=true&characterEncoding=UTF-8&rewriteBatchedStatements=true"
        driver = "com.mysql.cj.jdbc.Driver"
        user = "[username]"
        password = "[password]",
        # dctime must be converted to string, because in the Hive table this field is a string; include the partition field in the query—SeaTunnel will handle it automatically in the sink
        query = "select fd_id, fd_app_name, fd_model_name, fd_model_id, fd_key, fd_parameter1, fd_parameter2, fd_create_time, fd_subject, fd_type, fd_link, fd_mobile_link, fd_pad_link, fd_bundle, fd_replace_text, fd_md5, fd_del_flag, fd_level, doc_creator_id, fd_extend_content, fd_lang, fd_cate_name, fd_cate_id, fd_template_name, fd_template_id, fd_hierarchy_id, cast(date_format(fd_create_time, '%Y-%m-%d') as char) as dctime from sys_notify_todo_bak"
    }
}

transform {
}

sink {
    S3File {
      bucket = "s3a://seatunnel"
      fs.s3a.endpoint = "[minio‑host/ip]:9000"
      access_key = "[username]"
      secret_key = "[password]"
      fs.s3a.aws.credentials.provider = "org.apache.hadoop.fs.s3a.SimpleAWSCredentialsProvider"
      # directory path
      path = "/doris/warehouse/ods_ekp/ods_sys_notify_todo_bak"
      tmp_path = "/data/tmp/seatunnel"
      # Mandatory; because my MinIO is not SSL‑enabled, set as follows
      hadoop_s3_properties {
        "fs.s3a.connection.ssl.enabled" = "false"
        "fs.s3a.path.style.access" = "true"
      }
      # Parquet file format
      file_format_type = "parquet"
      # Must use \\ to represent \
      field_delimiter = "\\001"
      # Required for Parquet or it will fail
      parquet_avro_write_timestamp_as_int96 = true
      # Compression algorithm
      compress_codec = "zstd"
      have_partition = true
      partition_by = ["dctime"]
      partition_dir_expression = "${k0}=${v0}"
      is_partition_field_write_in_file = false
      schema_save_mode = "CREATE_SCHEMA_WHEN_NOT_EXIST"
      data_save_mode = "APPEND_DATA"
      custom_filename = true
      file_name_expression = "${transactionId}_${now}"
      filename_time_format = "yyyy.MM.dd"
  }
} Step 2: Run the SeaTunnel Sync and Execute in Hive -- Refresh the physical directory mapping
MSCK REPAIR TABLE ods_ekp.ods_sys_notify_todo_bak;

-- Query the Hive table to confirm data
SELECT * FROM ods_ekp.ods_sys_notify_todo_bak LIMIT 100; -- Refresh the physical directory mapping
MSCK REPAIR TABLE ods_ekp.ods_sys_notify_todo_bak;

-- Query the Hive table to confirm data
SELECT * FROM ods_ekp.ods_sys_notify_todo_bak LIMIT 100; Step 3: Create the Doris Hive Catalog External Database CREATE CATALOG hive PROPERTIES (
    'type' = 'hms',
    'hive.metastore.uris' = 'thrift://[hive‑metastore‑ip]:9083',
    "s3.endpoint" = "http://[minio‑host/ip]:9000",
    "s3.region" = "us-east-1",
    "s3.access_key" = "[username]",
    "s3.secret_key" = "[password]",
    "s3.connection.ssl.enabled" = "false",
    "use_path_style" = "true",
    "hive.version" = '2.1.1'
);

REFRESH CATALOG hive;

SHOW DATABASES FROM hive;

SELECT * FROM hive.ods_ekp.ods_sys_notify_todo_bak LIMIT 100; CREATE CATALOG hive PROPERTIES (
    'type' = 'hms',
    'hive.metastore.uris' = 'thrift://[hive‑metastore‑ip]:9083',
    "s3.endpoint" = "http://[minio‑host/ip]:9000",
    "s3.region" = "us-east-1",
    "s3.access_key" = "[username]",
    "s3.secret_key" = "[password]",
    "s3.connection.ssl.enabled" = "false",
    "use_path_style" = "true",
    "hive.version" = '2.1.1'
);

REFRESH CATALOG hive;

SHOW DATABASES FROM hive;

SELECT * FROM hive.ods_ekp.ods_sys_notify_todo_bak LIMIT 100; Explanation: Because I am using CDH 6.3.2 and Hive 2.1.1, you need to specify "hive.version" = '2.1.1' when creating the catalog.
Since my MinIO is not SSL‑enabled, configure "s3.connection.ssl.enabled" = "false".
MinIO uses path‑style addressing, so set "use_path_style" = "true".
SeaTunnel version: 2.3.11
Doris version: 2.0.15 Because I am using CDH 6.3.2 and Hive 2.1.1, you need to specify "hive.version" = '2.1.1' when creating the catalog. "hive.version" = '2.1.1' Since my MinIO is not SSL‑enabled, configure "s3.connection.ssl.enabled" = "false". "s3.connection.ssl.enabled" = "false" MinIO uses path‑style addressing, so set "use_path_style" = "true". "use_path_style" = "true" SeaTunnel version: 2.3.11 Doris version: 2.0.15

The code in this story is for educational purposes. The readers are solely responsible for whatever they build with it.

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