Target Permissions

Teradata® Listener™ User Guide

brand
Analytical Ecosystem
prodname
Teradata Listener
vrm_release
2.05
category
User Guide
featnum
B035-2910-039K

Teradata

The target system user must have read and write access to the Teradata target system. The following example shows how to grant read and write privileges on the target system.

Grant select on DBC.ColumnsV to {User};
Grant select on DBC.AllRightsV to {User};
Grant select on DBC.UDTInfo to {User};
Grant select on DBC.TablesV to {User};

For the data field, Teradata supports CLOB, JSON, or VARCHAR. If you use VARCHAR and send a message larger than the preallocated column size, the message is truncated.

HDFS

The target system user must have permission to create and modify files in HDFS for the defined data path. HDFS includes the following default configurations that are not adjustable:

Configuration Value
File Rotation Size 20 MB
File Rotation Time 1 Day
Block Size 128 MB
Buffer Size 4 kb
Replication Factor 3
File Naming Conventions /user/defined/path/[target_id]/file.seq
Compression Code Sequence
Before Listener can write data to an HDFS target for a Kerberized Hadoop instance, valid credentials for the following are required:
  • KDC
  • Principal
  • Base64 encoded keytab file content
Listener 2.0 and later do not prevalidate the Kerberized HDFS target credentials provided by the end user.
The following example shows the fields where the credentials must be provided.
...
    "data_path": {
      "extension": "seq",
      "path": "/user/testuser/kerberos"
    },
    "properties":{
        "kdc":"ip-xxx-xx-xx-xxx.location.compute.internal:88",
        "principal":"testuser@ABC.LOCATION.COMPUTE.INTERNAL",
        "base64KeytabContent":"BQIAAABdAAE...F+zcAAAAB" 
}
 }' \
  -i \
  https://CLUSTER.DOMAIN/listener/appservices/targets

HBase

The target system user must have permission to access and write to the table and column family.

Aster

The target system user must have permission to access and write data to the database and table.