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From Nirmal Kumar <nirmal.ku...@impetus.co.in>
Subject Hadoop migration downtime: Hadoop 1.x to 2.x
Date Thu, 16 Jan 2014 12:14:20 GMT

I want to know while upgrading\migrating from Apache Hadoop 1.x to 2.x(MRv2+YARN) in a production
cluster of several nodes is there any *anticipated downtime* that one needs to be aware of?
I am asking this since this will hamper the *HA (High Availability)*.

IMHO as with any other upgrade\migrate process, it will have some *manual steps*(sanity checks,
backups) and need *thorough testing* before going live.

Please share your opinions on any other reasons for the downtime.



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