[HDFS-14591] NameNode should move the replicas to the correct storages after the storage policy is changed.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Jinglun
• Reporter: Jinglun
• Created: 21/Jun/19 03:21
• Updated: 02/Oct/19 17:15
• Resolved: 22/Jun/19 10:15

Description

Our Xiaomi HDFS has a cluster storaging both HOT and COLD data. We have a backgroud process searching all the files to find those that are not accessed for a period of time. Then we set them to COLD and start a mover to move the replicas. After moving, all the replicas are consistent with the storage policy.
It's a natural idea to let the NameNode handle the move.

Issue Links

• is a child of: HDFS-14566 Quota improvement in HDFS