Finalise HDFS Upgrade option disabled

kish5430 — Mon, 09 Nov 2020 17:04:59 GMT

Hi Team,

We have done the cluster upgrade to 7.1.2. After this "Finalise HDFS upgrade" option is disabled.

Need help on below points

1)How to enable "Finalise HDFS upgrade"?

2) Differenece between "Finalise HDFS upgrade" and "Finalise Metadata upgrade"

3)Is there any specifice order to upgrade HDFS and Metadata.

Thanks

Re: Finalise HDFS Upgrade option disabled

GangWar — Tue, 10 Nov 2020 15:11:18 GMT

@kish5430 You might have done that. Both are technically same means just acronyms.

https://docs.cloudera.com/cdp-private-cloud/latest/upgrade-cdh/topics/ug_cdh_upgrade.html

Finalize the HDFS Upgrade

To determine if you can finalize the upgrade, run important workloads and ensure that they are successful. After you have finalized the upgrade, you cannot roll back to a previous version of HDFS without using backups.Verifying that you are ready to finalize the upgrade can take a long time.
Make sure you have enough free disk space, keeping in mind that the following behavior continues until the upgrade is finalized:
Deleting files does not free up disk space.
Using the balancer causes all moved replicas to be duplicated.
All on-disk data representing the NameNodes metadata is retained, which could more than double the amount of space required on the NameNode and JournalNode disks.
Go to the HDFS service.
Click the Instances tab.
Click the link for the NameNode instance.The NameNode instance page displays.
Select Actions > Finalize Metadata Upgrade and click Finalize Metadata Upgrade to confirm.

This can be also done manually though if needed:
https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html

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Finalise HDFS Upgrade option disabled

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