[HDFS-15254] Namenode should have a favored ssd nodes hint for ssd related storagy policy

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: block placement
• Assignee: Unassigned
• Reporter: Zheng Wang
• Created: 01/Apr/20 09:02
• Updated: 01/Apr/20 09:07

Description

We use ONE_SSD as storagy policy in HBase,but when using bulkload,i found it could not specify a datanode to placement the SSD replica,so the regionserver that hold the region will read the local DISK replica,because the SSD replica is in remote node.