Help Center/ MapReduce Service/ Component Operation Guide (Paris Region)/ Using Loader/ Destination Link Configurations of Loader Jobs
Updated on 2022-12-14 GMT+08:00
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Destination Link Configurations of Loader Jobs

Overview

When Loader jobs save data to different storage locations, a destination link needs to be selected and the link properties need to be configured.

obs-connector

Table 1 Destination link properties of obs-connector

Parameter

Description

Bucket Name

OBS file system for storing final data.

Output Directory

Directory for storing final data in the file system. A directory must be specified.

File Format

Loader supports the following file formats of data stored in OBS:

  • CSV_FILE: Specifies a text file. When the destination link is a database link, only the text file is supported.
  • BINARY_FILE: Specifies binary files excluding text files.

Line Separator

Identifier of each line end of final data

Field Separator

Identifier of each field end of final data

Encoding Type

Text encoding type of final data. It takes effect on text files only.

generic-jdbc-connector

Table 2 Destination link properties of generic-jdbc-connector

Parameter

Description

Schema Name

Name of the database storing final data

Table

Name of the table saving final data

ftp-connector or sftp-connector

Table 3 Destination link properties of ftp-connector or sftp-connector

Parameter

Description

Output Directory

Directory for storing final data in the file server. A directory must be specified.

File Format

Loader supports the following file formats of data stored in the file server:

  • CSV_FILE: Specifies a text file. When the destination link is a database link, only the text file is supported.
  • BINARY_FILE: Specifies binary files excluding text files.

Line Separator

Identifier of each line end of final data

NOTE:

If FTP or SFTP serves as a destination link and File Format is set to BINARY_FILE, the value of Line Separator in the advanced properties is invalid.

Field Separator

Identifier of each field end of final data

NOTE:

If FTP or SFTP serves as a destination link and File Format is set to BINARY_FILE, the value of Field Separator in the advanced properties is invalid.

Encoding Type

Text encoding type of final data. It takes effect on text files only.

hbase-connector

Table 4 Destination link properties of hbase-connector

Parameter

Description

Table Name

Name of the HBase table saving final data. You can query and select it on the interface.

Method

Data can be imported to an HBase table using either BULKLOAD or PUTLIST.

Clear Data Before Import

Whether to clear data in the destination HBase table. Options are as follows:

  • True: Clean up data in the table.
  • False: Do not clean up data in the table. If you select False, an error is reported during job running if data exists in the table.

hdfs-connector

Table 5 Destination link properties of hdfs-connector

Parameter

Description

Output Directory

Directory for storing final data in HDFS. A directory must be specified.

File Format

Loader supports the following file formats of data stored in HDFS:

  • CSV_FILE: Specifies a text file. When the destination link is a database link, only the text file is supported.
  • BINARY_FILE: Specifies binary files excluding text files.

Compression Codec

Compression mode used when a file is saved to HDFS. The following modes are supported: NONE, DEFLATE, GZIP, BZIP2, LZ4, and SNAPPY.

Overwrite

How to process files in the output directory when files are imported to HDFS. Options are as follows:

  • True: Clean up files in the directory and import new files by default.
  • False: Do not clean up files. If files exist in the output directory, job running fails.

Line Separator

Identifier of each line end of final data

NOTE:

If HDFS serves as a destination link and File Format is set to BINARY_FILE, the value of Line Separator in the advanced properties is invalid.

Field Separator

Identifier of each field end of final data

NOTE:

If HDFS serves as a destination link and File Format is set to BINARY_FILE, the value of Field Separator in the advanced properties is invalid.

hive-connector

Table 6 Destination link properties of hive-connector

Parameter

Description

Database

Name of the Hive database storing final data. You can query and select it on the interface.

Table

Name of the Hive table saving final data. You can query and select it on the interface.
Parent topic: Using Loader