[HDFS-6004] Change DFSAdmin for rolling upgrade commands

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDFS-5535 (Rolling upgrades)
• Component/s: hdfs-client
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 24/Feb/14 11:51
• Updated: 24/Feb/14 22:05
• Resolved: 24/Feb/14 22:05

Description

When rolling upgrade is initiated, a image is created for rollback. We propose the following changes for the DFSAdmin for rolling upgrade commands:

• change "dfsadmin -rollingUpgrade start" to "dfsadmin -rollingUpgrade prepare";
• add information for the rollback image to "dfsadmin -rollingUpgrade query".