Updated on 2024-10-09 GMT+08:00

COMPACTION

Function

This command is used to convert row-based log files in MOR tables into column-based data files in parquet tables, accelerating record search.

Syntax

SCHEDULE COMPACTION on tableIdentifier |tablelocation;

SHOW COMPACTION on tableIdentifier |tablelocation;

RUN COMPACTION on tableIdentifier |tablelocation [at instant-time];

Parameter Description

Table 1 Parameters

Parameter

Description

tableIdentifier

Name of the Hudi table to convert log files.

tablelocation

Storage path of the Hudi table.

instant-time

Time to run the command. You can run the show compaction command to view the instant-time value.

Examples

schedule compaction  on h1;
show compaction on h1;
run compaction on h1 at 20210915170758;

schedule compaction  on '/tmp/hudi/h1';
run compaction on '/tmp/hudi/h1';

Precautions

You need to set hoodie.payload.ordering.field to the value of preCombineField when you use the Hudi CLI or API to trigger compaction for the Hudi table created by SQL.

System Response

You can view the result in driver logs or on the client.