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Steps to follow before and after the memory upgrade in HDP 2.6 cluster

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I am planning to upgrade memory (32 GB to 64 GB) in a 10 node cluster (both name & data nodes).

Services being used: Hive, Hbase and Spark

Need the expert advice on

1. What are the steps to follow before memory upgrade

2. What are the steps to follow after memory upgrade (configuration changes, restart/rebalancing etc)

3. step by step instructions and best practices to follow during hardware (CPU/MEMORY/DISK) upgrades?

appreciate if you could share any link on this

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