Hello, I'm trying to swap out a standby NameNode in a QJM / HA configuration. I believe the steps to achieve this would be something similar to:
Use the Bootstrap standby command to prep the replacment standby. Or rsync if the command fails. Somehow update the datanodes, so they push the heartbeat / journal to the new standby Update the xml configuration on all nodes to reflect the replacment standby. Start the replacment standby Use some hadoop command to refresh the datanodes to the new NameNode configuration. I am not sure how to deal with the Journal switch, or if I am going about this the right way. Can anybody give me some suggestions here? Regards, Colin Williams
