Support Questions
Find answers, ask questions, and share your expertise
Announcements
Alert: Welcome to the Unified Cloudera Community. Former HCC members be sure to read and learn how to activate your account here.

Planned Downtime for Datanode

Planned Downtime for Datanode

Hi All,

 

I have a situation where we want to upgrade hardware of datanodes.

I know that I can decommission each of the machine and rejoin them.  

 

However, I was looking for ways to avoid replication of terabytes of data to another nodes as this is planned downtime.

 

I came across an option where I can increase heartbeat recheck interval (dfs.namenode.heartbeat.recheck-interval)  to delay the time namenode take to identify a dead datanode.

To use this option I am sure I need to restart namenode deamon.  

 

Is this the way cloudera recommends or is there any other ?

 

Thank you all in advance.

Don't have an account?
Coming from Hortonworks? Activate your account here