To HDFS

If the destination link of a job is an HDFS link, configure the destination job parameters based on Table 1.

**Table 1** Parameter description
Parameter	Description	Example Value
Write Directory	HDFS directory to which data will be written. This parameter can be configured as a macro variable of date and time and a path name can contain multiple macro variables. When the macro variable of date and time works with a scheduled job, the incremental data can be synchronized periodically. For details, see Incremental Synchronization Using the Macro Variables of Date and Time. NOTE: If you have configured a macro variable of date and time and schedule a CDM job through DataArts Studio DataArts Factory, the system replaces the macro variable of date and time with (Planned start time of the data development job – Offset) rather than (Actual start time of the CDM job – Offset).	/user/output
File Format	Format in which data is written. The options are as follows: CSV: Data is written in CSV format, which is used for migrating data tables to files. Binary: Files will be transferred directly. CDM writes the files without changing their format. This setting is suitable for file migration. If data is migrated between file-related data sources, such as FTP, SFTP, OBS, and HDFS, the value of File Format must the same as the source file format.	CSV
Duplicate File Processing Method	This parameter is available when the migration source is a file data source, such as HTTP, FTP, SFTP, OBS, and HDFS. Files with the same name and size are identified as duplicate files. If there are duplicate files during data writing, the following methods are available: Replace Skip Stop job	Stop job
Compression Format	File compression format after data writing. The following compression formats are supported: None: The files are not compressed. DEFLATE: The files are compressed in DEFLATE format. gzip: The files are compressed in gzip format. bzip2: The files are compressed in bzip2 format. LZ4: The files are compressed in LZ4 format. Snappy: The files are compressed in snappy format.	Snappy
Line Separator	Lind feed character in a file. By default, the system automatically identifies \n, \r, and \r\n. This parameter is not used when File Format is set to Binary.	\n
Field Delimiter	Field delimiter in the file. This parameter is not used when File Format is set to Binary.	,
Use Quote Character	This parameter is displayed only when File Format is CSV. It is used when database tables are migrated to file systems. If you set this parameter to Yes and a field in the source data table contains a field delimiter or line separator, CDM uses double quotation marks (") as the quote character to quote the field content as a whole to prevent a field delimiter from dividing a field into two fields, or a line separator from dividing a field into different lines. For example, if the hello,world field in the database is quoted, it will be exported to the CSV file as a whole.	No
Use First Row as Header	When a table is migrated to a CSV file, CDM does not migrate the heading line of the table by default. If you set this parameter to Yes, CDM writes the heading line of the table to the file.	No
Write to Temporary File	Whether to write the binary file to a .tmp file first. After the migration is successful, run the rename or move command at the migration destination to restore the file.	No
Job Success Marker File	Whether to generate a marker file with a custom name in the destination directory after a job is executed successfully. If you do not specify a file name, this function is disabled by default.	finish.txt
Customize Hierarchical Directory	Users can customize the directory hierarchy of files. Example: [Table name]/[Year]/[Month]/[Day]/[Data file name]. csv	-
Hierarchical Directory	Used to specify the directory level of a file, with time macro supported (the time format is yyyy/MM/dd). If this parameter is left blank, the directory does not have a hierarchical structure. NOTE: If the source link is a relational database link, the directory name consists of the source table name and a custom directory name. In other scenarios, the directory is a custom directory.	${dateformat(yyyy/MM/dd, -1, DAY)}
Encryption	This parameter is displayed only when File Format is set to Binary. Whether to encrypt the uploaded data. The options are as follows: None: Data is written without encryption. AES-256-GCM: The AES 256-bit encryption algorithm is used to encrypt data. Currently, only the AES-256-GCM (NoPadding) encryption algorithm is supported. This parameter is used for encryption at the migration destination and decryption at the migration source. For details, see Encryption and Decryption During File Migration.	AES-256-GCM
DEK	This parameter is displayed only when Encryption is set to AES-256-GCM. The key consists of 64 hexadecimal numbers. Remember the key configured here because the decryption key must be the same as that configured here. If the encryption and decryption keys are inconsistent, the system does not report an exception, but the decrypted data is incorrect.	DD0AE00DFECD78BF051BCFDA25BD4E320DB0A7AC75A1F3FC3D3C56A457DCDC1B
IV	This parameter is displayed only when Encryption is set to AES-256-GCM. The initialization vector consists of 32 hexadecimal numbers. Remember the initialization vector configured here because the initialization vector used for decryption must be the same as that configured here. If the encryption and decryption keys are inconsistent, the system does not report an exception, but the decrypted data is incorrect.	5C91687BA886EDCD12ACBC3FF19A3C3F