Link to HBase

CDM supports the following HBase data sources:

MRS HBase
FusionInsight HBase
Apache HBase

MRS HBase

When connecting CDM to HBase of MRS, configure the parameters as described in Table 1.

Before creating an MRS link, you need to add an authenticated Kerberos user on MRS and log in to the MRS management page to change the initial password. Then use the new user to create an MRS link.
To connect to an MRS 2.x cluster, create a CDM cluster of version 2.x first. CDM 1.8.x clusters cannot connect to MRS 2.x clusters.
Ensure that the MRS cluster and the DataArts Studio instance can communicate with each other. The following requirements must be met for network interconnection:
- If the CDM cluster in the DataArts Studio instance and the MRS cluster are in different regions, a public network or a dedicated connection is required. If the Internet is used for communication, ensure that an EIP has been bound to the CDM cluster, and the MRS cluster can access the Internet and the port has been enabled in the firewall rule.
- If the CDM cluster in the DataArts Studio instance and the MRS cluster are in the same region, VPC, subnet, and security group, they can communicate with each other by default. If they are in the same VPC but in different subnets or security groups, you must configure routing rules and security group rules. For details about how to configure routing rules, see Custom Route in Region Type I > Adding Routes in Virtual Private Cloud (VPC) Usage Guide. For details about how to configure security group rules, see Security Group > Adding a Security Group Rule in Virtual Private Cloud (VPC) Usage Guide.
- The MRS cluster and the DataArts Studio workspace belong to the same enterprise project. If they do not, you can modify the enterprise project of the workspace.

**Table 1** MRS HBase link parameters
Parameter	Description	Example Value
Name	Link name, which should be defined based on the data source type, so it is easier to remember what the link is for	mrs_hbase_link
Manager IP	Floating IP address of MRS Manager. Click Select next to the Manager IP text box to select an MRS cluster. CDM automatically fills in the authentication information.	127.0.0.1
Username	If Authentication Method is set to KERBEROS, you must provide the username and password used for logging in to MRS Manager. If you need to create a snapshot when exporting a directory from HDFS, the user configured here must have the administrator permission on HDFS. To create a data connection for an MRS security cluster, do not use user admin. The admin user is the default management page user and cannot be used as the authentication user of the security cluster. You can create an MRS user and set Username and Password to the username and password of the created MRS user when creating an MRS data connection. NOTE: If the CDM cluster version is 2.9.0 or later and the MRS cluster version is 3.1.0 or later, the created user must have the permissions of the Manager_viewer role to create links on CDM. To perform operations on databases, tables, and data of a component, you also need to add the user group permissions of the component to the user. If the CDM cluster version is earlier than 2.9.0 or the MRS cluster version is earlier than 3.1.0, the created user must have the permissions of Manager_administrator or System_administrator to create links on CDM. A user with only the Manager_tenant or Manager_auditor permission cannot create connections.	cdm
Password	Password used for logging in to MRS Manager	-
Authentication Method	Authentication method used for accessing the cluster: SIMPLE: for non-security mode KERBEROS: for security mode	SIMPLE
HBase Version	HBase version	HBASE_2_X
Run Mode	This parameter is used only when the HBase version is HBASE_2_X. Running mode of the HBase link. The options are as follows: EMBEDDED: The link instance runs with CDM. This mode delivers better performance. STANDALONE: The link instance runs in an independent process. If CDM needs to connect to multiple Hadoop data sources (MRS, Hadoop, or CloudTable) with both Kerberos and Simple authentication modes, select STANDALONE or configure different agents. Note: The STANDALONE mode is used to solve the version conflict problem. If the connector versions of the source and destination ends of the same link are different, a JAR file conflict occurs. In this case, you need to place the source or destination end in the STANDALONE process to prevent the migration failure caused by the conflict.	STANDALONE
Use Cluster Config	You can create cluster configurations on the Links page to simplify the configuration of Hadoop link parameters.	No
Cluster Config Name	This parameter is valid only when Use Cluster Config is set to Yes. Select a cluster configuration that has been created. For details, see Managing Cluster Configurations.	hbase_01

Click Show Advanced Attributes, and then click Add to add configuration attributes of other clients. The name and value of each attribute must be configured. You can click Delete to delete no longer used attributes.

FusionInsight HBase

When connecting CDM to HBase of FusionInsight HD, configure the parameters as described in Table 2.

**Table 2** FusionInsight HBase link parameters
Parameter	Description	Example Value
Name	Link name, which should be defined based on the data source type, so it is easier to remember what the link is for	FI_hbase_link
Manager IP	IP address of FusionInsight Manager	127.0.0.1
Manager Port	Port number of FusionInsight Manager	28443
CAS Server Port	Port number of the CAS server used to connect to FusionInsight	20009
Username	Username used for logging in to FusionInsight Manager.	cdm
Password	Password used for logging in to FusionInsight Manager	-
Authentication Method	Authentication method used for accessing the cluster: SIMPLE: for non-security mode KERBEROS: for security mode	Kerberos
HBase Version	HBase version	HBASE_2_X
Run Mode	This parameter is used only when the HBase version is HBASE_2_X. Running mode of the HBase link. The options are as follows: EMBEDDED: The link instance runs with CDM. This mode delivers better performance. STANDALONE: The link instance runs in an independent process. If CDM needs to connect to multiple Hadoop data sources (MRS, Hadoop, or CloudTable) with both Kerberos and Simple authentication modes, select STANDALONE or configure different agents. Note: The STANDALONE mode is used to solve the version conflict problem. If the connector versions of the source and destination ends of the same link are different, a JAR file conflict occurs. In this case, you need to place the source or destination end in the STANDALONE process to prevent the migration failure caused by the conflict.	STANDALONE
Use Cluster Config	You can use the cluster configuration to simplify parameter settings for the Hadoop connection.	No
Cluster Config Name	This parameter is valid only when Use Cluster Config is set to Yes. Select a cluster configuration that has been created. For details, see Managing Cluster Configurations.	hbase_01

Apache HBase

When connecting CDM to HBase of Apache Hadoop, configure the parameters as described in Table 3.

**Table 3** Apache HBase link parameters
Parameter	Description	Example Value
Name	Link name, which should be defined based on the data source type, so it is easier to remember what the link is for	hadoop_hbase_link
ZK Link	ZooKeeper link of HBase Format: <host1>:<port>,<host2>:<port>,<host3>:<port>	zk1.example.com:2181,zk2.example.com:2181,zk3.example.com:2181
Authentication Method	Authentication method used for accessing the cluster: SIMPLE: for non-security mode KERBEROS: for security mode	Kerberos
Principal	When Authentication Method is set to KERBEROS, this parameter is mandatory. It is the username in the Kerberos security mode and can be obtained from the Hadoop administrator. The value of this parameter must be the same as that in the Keytab file.	-
Keytab File	When Authentication Method is set to KERBEROS, a Keytab file must be uploaded. The Keytab file is an authentication credential and can be obtained from the Hadoop administrator. Before obtaining the keytab file, you need to change the password of this user at least once in the cluster. Otherwise, the downloaded keytab file may be unavailable. After a user password is changed, the exported keytab file becomes invalid, and you need to export a keytab file again.	-
IP and Host Name Mapping	If the configuration file uses the host name, configure the mapping between the IP address and host name. Separate the IP addresses and host names by spaces and mappings by semicolons (;), carriage returns, or line feeds.	10.3.6.9 hostname01 10.4.7.9 hostname02
HBase Version	HBase version	HBASE_2_X
Run Mode	This parameter is used only when the HBase version is HBASE_2_X. Running mode of the HBase link. The options are as follows: EMBEDDED: The link instance runs with CDM. This mode delivers better performance. STANDALONE: The link instance runs in an independent process. If CDM needs to connect to multiple Hadoop data sources (MRS, Hadoop, or CloudTable) with both Kerberos and Simple authentication modes, select STANDALONE or configure different agents. Note: The STANDALONE mode is used to solve the version conflict problem. If the connector versions of the source and destination ends of the same link are different, a JAR file conflict occurs. In this case, you need to place the source or destination end in the STANDALONE process to prevent the migration failure caused by the conflict.	STANDALONE
Use Cluster Config	You can use the cluster configuration to simplify parameter settings for the Hadoop connection.	No
Cluster Config Name	This parameter is valid only when Use Cluster Config is set to Yes. Select a cluster configuration that has been created. For details, see Managing Cluster Configurations.	hbase_01