[KYLIN-4833] use distcp to control the speed of writting hfile data to hbase cluster

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: v3.1.1
• Fix Version/s: v3.1.2
• Component/s: Storage - HBase
• External issue URL: https://github.com/apache/kylin/pull/1494
• Assignee: fengpod
• Reporter: fengpod
• Created: 02/Dec/20 06:36
• Updated: 27/Apr/21 02:37
• Resolved: 18/Mar/21 09:40

Description

When a large data is written to hbase cluster at the same time，the cluster load will become very high，which will affect the query performance. This pr allows data to be written data to hadoop hdfs when doing step “Convert Cuboid Data to HFile”，and then hfile will be transferred to the hbase cluster by DistCp。DistCp controls the speed of write data so as to reduce the pressure of cluster。 This pr adds a new step " HFile Distcp To HBase" between “Convert Cuboid Data to HFile” and "Load HFile to HBase Table" 。As look like this：