Map reduce history moving instance using curl

Question

Hi Team,

In case if map reduce server history goes down i would like to move history server to another instance using rest api .I got info from one of the blog"https://cwiki.apache.org/confluence/display/AMBARI/Move+Mapreduce2+History+Server" .But I would like to know pros and cons of it.Currently in confused state .What will be the impact of moving instance.Could anyone please pour your inputs here.Wil it impact the current task .How to get to know

Regards

Shilpa

Answer 1

Hi@Shilpa,

First thing, you will lose your metadata. Whenever you delete your Mapreduce History Server, means all logs will delete. Now on that point, you need to take your decision. If you think you don't need the logs, then delete it and create a new one.

Comments

Thank you !! but however if mapreduce server is only down then what is the alternative solution ,if I cant bring up the service on same host .Is it possible  to move inorder to avoid metadata lost?

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Hi@Shilpa,

First don't delete the older one. Create your new server and replace the new log file with the older file. And see it is working or not.