Using a Kudu Client

Prerequisites

The cluster client has been installed. For example, the client is installed in the /opt/hadoopclient directory. The client directory in the following operations is only an example. Change it to the actual installation directory.

Procedure

1. Log in to the node where the client is installed as the client installation user.
2. Run the following command to go to the client installation directory:

   cd /opt/hadoopclient

3. Run the following command to configure environment variables:

   source bigdata_env

4. Run the Kudu command line tool.

   Run the command line tool of the Kudu component to view help information.

   kudu -h

   The command output is as follows:

   Usage: ./kudu <command> [<args>]
    
   <command> can be one of the following:
            cluster   Operate on a Kudu cluster
           diagnose   Diagnostic tools for Kudu servers and clusters
                 fs   Operate on a local Kudu filesystem
                hms   Operate on remote Hive Metastores
      local_replica   Operate on local tablet replicas via the local filesystem
             master   Operate on a Kudu Master
                pbc   Operate on PBC (protobuf container) files
               perf   Measure the performance of a Kudu cluster
     remote_replica   Operate on remote tablet replicas on a Kudu Tablet Server
              table   Operate on Kudu tables
             tablet   Operate on remote Kudu tablets
               test   Various test actions
            tserver   Operate on a Kudu Tablet Server
                wal   Operate on WAL (write-ahead log) files

   

   The Kudu command line tool does not support DDL and DML operations, but provides the refined query function for the cluster, master, tserver, fs, and table parameters.

   Common operations:

   • Check the tables in the current cluster.

     ./kudu table list KuduMaster instance IP1:7051, KuduMaster instance IP2:7051, KuduMaster instance IP3:7051

   • Query the configurations of the KuduMaster instance of the Kudu service.

     ./kudu master get_flags KuduMaster instance IP:7051

   • Query the schema of a table.

     ./kudu table describe KuduMaster instance IP1:7051, KuduMaster instance IP2:7051, KuduMaster instance IP3:7051 table name

   • Delete a table.

     ./kudu table delete KuduMaster instance IP1:7051, KuduMaster instance IP2:7051, KuduMaster instance IP3:7051 table name

     

     To obtain the IP address of the KuduMaster instance, choose Components > Kudu > Instances on the cluster details page.