Hema writes:
> You can directly migrate from hadoop 3.2.4 (HBase 2.5.8) to Hadoop 3.4.1
> (HBase 2.5.12), No need of intermediate migration.
Great, that's what I thought.
> What is your migration plan?
Following, basically, the "HDFS Rolling upgrade" section of the Hadoop
documentation:
· 'dfsadmin -rollingUpgrade prepare'
· Upgrade the standby namenode, start with '-rollingUpgrade started'
· Fail over, upgrade the other (now) standby namenode, start with
'-rollingUpgrade started'
· For each datanode: '-shutdownDataNode', upgrade, start again, wait to settle
· Finish with 'dfsadmin -rollingUpgrade finalize'
When that is done, then following the "Rolling Upgrades" section in
the HBase book.
We used the same procedure last year when we went from Hadoop 3.1.3 to
3.2.4 and HBase 2.2.2 to 2.5.8.
> Are you going to create a new version cluster? and then move data from old
> cluster to new cluster?
> Or
> Are you going to try inplace upgrade?
We will be upgrading in place (we have 3 servers for Zookeeper/
Namenodes/Masters, and 25 for Datanodes/Regionservers ~ 470 TB
Configured Capacity).
Thanks for the input!
Best regards,
Adam
--
"No more than that, but very powerful all the Adam Sjøgren
same; simple things are good." [email protected]
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