MRS HBase Sink Stream

Function

DLI exports the output data of the Flink job to HBase of MRS.

Prerequisites

An MRS cluster has been created by using your account. DLI can interconnect with HBase clusters with Kerberos enabled.
In this scenario, jobs must run on the dedicated queue of DLI. Ensure that the dedicated queue of DLI has been created.
To create a dedicated DLI queue, select Pay-per-use for Billing Mode and click Dedicated Resource Mode for Queue Type when creating a queue. For details, see Creating a Queue in the Data Lake Insight User Guide.
Ensure that a datasource connection has been set up between the DLI dedicated queue and the MRS cluster, and security group rules have been configured based on the site requirements.
For details about how to create an enhanced datasource connection, see Enhanced Datasource Connections in the Data Lake Insight User Guide.

For details about how to configure security group rules, see Security Group in the Virtual Private Cloud User Guide.
If you use MRS HBase, ensure that you have added IP addresses of all hosts in the MRS cluster for the enhanced datasource connection.
For details about how to add an IP-domain mapping, see Modifying the Host Information in the Data Lake Insight User Guide.

Syntax

CREATE SINK STREAM stream_id (attr_name attr_type (',' attr_name attr_type)* )
  WITH (
    type = "mrs_hbase",
    region = "",
    cluster_address = "",
    table_name = "",
    table_columns = "",
    illegal_data_table = "",
    batch_insert_data_num = "",
    action = ""
)

Keyword

**Table 1** Keyword description
Parameter	Mandatory	Description
type	Yes	Output channel type. mrs_hbase indicates that data is exported to HBase of MRS.
region	Yes	Region where MRS resides.
cluster_address	Yes	ZooKeeper address of the cluster to which the data table to be inserted belongs. The format is ip1,ip2:port.
table_name	Yes	Name of the table where data is to be inserted. It can be specified through parameter configurations. For example, if you want one or more certain columns as part of the table name, use car_pass_inspect_with_age_${car_age}, where car_age is the column name.
table_columns	Yes	Columns to be inserted. The format is rowKey, f1:c1, f1:c2, f2:c1, where rowKey must be specified. If you do not want to add a column (for example, the third column) to the database, set this parameter to rowKey,f1:c1,,f2:c1.
illegal_data_table	No	If this parameter is specified, abnormal data (for example, rowKey does not exist) will be written into the table. If not specified, abnormal data will be discarded. The rowKey value is taskNo_Timestamp followed by six random digits, and the schema is info:data, info:reason.
batch_insert_data_num	No	Number of data records to be written in batches at a time. The value must be a positive integer. The upper limit is 1000. The default value is 10.
action	No	Whether data is added or deleted. Available options include add and delete. The default value is add.
krb_auth	No	Authentication name for creating a datasource connection authentication. This parameter is mandatory when Kerberos authentication is enabled. Set this parameter to the corresponding cross-source authentication name. For details, see Datasource Authentication. NOTE: Ensure that the /etc/hosts information of the master node in the MRS cluster is added to the host file of the DLI queue.

Precautions

None

Example

Output data to HBase of MRS.

CREATE SINK STREAM qualified_cars (
  car_id STRING,
  car_owner STRING,
  car_age INT,
  average_speed INT,
  total_miles INT
)
  WITH (
    type = "mrs_hbase",
    region = "xxx",
    cluster_address = "192.16.0.88,192.87.3.88:2181",
    table_name = "car_pass_inspect_with_age_${car_age}",
    table_columns = "rowKey,info:owner,,car:speed,car:miles",
    illegal_data_table = "illegal_data",
    batch_insert_data_num = "20",
    action = "add",
    krb_auth = "KRB_AUTH_NAME"
  );