Operating a Hudi Table Using hudi-cli.sh

Prerequisites

• You have created a user and added the user to user groups hadoop and hive on Manager.
• The Hudi client has been downloaded and installed.

Basic Operations

1. Log in to the client node as user root and run the following commands:

   cd Client installation directory

   source bigdata_env

   cd Client installation directoryHudi

   source component_env

   kinit Created user

2. Run the hudi-cli.sh command to access the Hudi client.

   cd Client installation directoryHudi

   hudi-cli.sh

   

3. Run the following example commands as required. For details about all commands, visit the Hudi official website.
   • Viewing help information

     help // View all Hudi CLI commands.

     help 'command' // View the help information and parameter list of a certain command.

   • Connecting to a table

     connect --path '/tmp/huditest/test_table'

   • Viewing table information

     desc

   • Viewing compaction plans

     compactions show all

   • Viewing cleaning plans

     cleans show

   • Performing the cleaning operation

     cleans run

   • Viewing commit information

     commits show

   • Viewing the partition where the commit is written to

     commit showpartitions --commit 20210127153356

     

     20210127153356 indicates the commit timestamp.

   • Viewing the file where the commit is written to

     commit showfiles --commit 20210127153356

   • Comparing the commit information of two tables

     commits compare --path /tmp/hudimor/mytest100

   • Rolling back a commit (Only the last commit can be rolled back.)

     commit rollback --commit 20210127164905

   • Scheduling a compaction

     compaction schedule --hoodieConfigs 'hoodie.compaction.strategy=org.apache.hudi.table.action.compact.strategy.BoundedIOCompactionStrategy,hoodie.compaction.target.io=1,hoodie.compact.inline.max.delta.commits=1'

   • Performing a compaction

     compaction run --parallelism 100 --sparkMemory 1g --retry 1 --compactionInstant 20210602101315 --hoodieConfigs 'hoodie.compaction.strategy=org.apache.hudi.table.action.compact.strategy.BoundedIOCompactionStrategy,hoodie.compaction.target.io=1,hoodie.compact.inline.max.delta.commits=1' --propsFilePath hdfs://hacluster/tmp/default/tb_test_mor/.hoodie/hoodie.properties --schemaFilePath /tmp/default/tb_test_mor/.hoodie/compact_tb_base.json

   • Creating a savepoint

     savepoint create --commit 20210318155750

   • Rolling back a specified savepoint

     savepoint rollback --savepoint 20210318155750

     

     1. If the commit operation causes metadata conflicts, you can run the commit rollback and savepoint rollback commands to roll back data, but the Hive metadata cannot be rolled back. In this case, you can delete the Hive table and manually synchronize data.
     2. The commit rollback command rolls back only the latest commit, and the savepoint rollback command rolls back only the latest savepoint. You cannot specify a commit or savepoint to roll back.