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https://issues.apache.org/jira/browse/AMBARI-12698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alejandro Fernandez resolved AMBARI-12698.
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Resolution: Fixed
> Update the stack by stopping and starting services in an orchestrated fashion
> -----------------------------------------------------------------------------
>
> Key: AMBARI-12698
> URL: https://issues.apache.org/jira/browse/AMBARI-12698
> Project: Ambari
> Issue Type: Epic
> Components: ambari-server
> Affects Versions: 2.3.0
> Reporter: Alejandro Fernandez
> Assignee: Alejandro Fernandez
> Priority: Critical
> Labels: branch:branch-dev-stop-all-upgrade
> Fix For: 2.3.0
>
> Attachments: AMBARI-12698_design_review.docx,
> AMBARI-12698_design_review.pdf
>
>
> Ambari needs to provide an option to upgrade the stack that is much faster,
> by taking downtime. Instead of rolling restarts, this will stop all services,
> and start them one at a time, with all hosts starting in parallel/batches.
> Benefits:
> * Relaxes requirements since NameNode HA is not needed
> * Faster since,
> ** Can upgrade an entire component by parallelizing across hosts. E.g., all
> ZK servers at once
> ** Parallelize across components. E.g., Falcon Server and Storm Nimbus
> servers in parallel
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