Jing Zhao created HDFS-6000:
-------------------------------
Summary: Avoid saving namespace when starting rolling upgrade
Key: HDFS-6000
URL: https://issues.apache.org/jira/browse/HDFS-6000
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently when administrator sends the "rollingUpgrade start" command to the
active NN, the NN will trigger a checkpoint (the rollback fsimage). This will
cause NN not able to serve for a period of time.
An alternative way is just to let the SBN do checkpoint, and rename the first
checkpoint after starting the rolling upgrade to rollback image. After the
rollback image is on both the ANN and the SBN, administrator can start
upgrading the software.
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)
